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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.02309">arXiv:2203.02309</a> <span> [<a href="https://arxiv.org/pdf/2203.02309">pdf</a>, <a href="https://arxiv.org/format/2203.02309">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1361-6471/ac841a">10.1088/1361-6471/ac841a <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aalbers%2C+J">J. Aalbers</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Aerne%2C+V">V. Aerne</a>, <a href="/search/hep-ex?searchtype=author&query=Agostini%2C+F">F. Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=Maouloud%2C+S+A">S. Ahmed Maouloud</a>, <a href="/search/hep-ex?searchtype=author&query=Akerib%2C+D+S">D. S. Akerib</a>, <a href="/search/hep-ex?searchtype=author&query=Akimov%2C+D+Y">D. Yu. Akimov</a>, <a href="/search/hep-ex?searchtype=author&query=Akshat%2C+J">J. Akshat</a>, <a href="/search/hep-ex?searchtype=author&query=Musalhi%2C+A+K+A">A. K. Al Musalhi</a>, <a href="/search/hep-ex?searchtype=author&query=Alder%2C+F">F. Alder</a>, <a href="/search/hep-ex?searchtype=author&query=Alsum%2C+S+K">S. K. Alsum</a>, <a href="/search/hep-ex?searchtype=author&query=Althueser%2C+L">L. Althueser</a>, <a href="/search/hep-ex?searchtype=author&query=Amarasinghe%2C+C+S">C. S. Amarasinghe</a>, <a href="/search/hep-ex?searchtype=author&query=Amaro%2C+F+D">F. D. Amaro</a>, <a href="/search/hep-ex?searchtype=author&query=Ames%2C+A">A. Ames</a>, <a href="/search/hep-ex?searchtype=author&query=Anderson%2C+T+J">T. J. Anderson</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieu%2C+B">B. Andrieu</a>, <a href="/search/hep-ex?searchtype=author&query=Angelides%2C+N">N. Angelides</a>, <a href="/search/hep-ex?searchtype=author&query=Angelino%2C+E">E. Angelino</a>, <a href="/search/hep-ex?searchtype=author&query=Angevaare%2C+J">J. Angevaare</a>, <a href="/search/hep-ex?searchtype=author&query=Antochi%2C+V+C">V. C. Antochi</a>, <a href="/search/hep-ex?searchtype=author&query=Martin%2C+D+A">D. Ant贸n Martin</a>, <a href="/search/hep-ex?searchtype=author&query=Antunovic%2C+B">B. Antunovic</a>, <a href="/search/hep-ex?searchtype=author&query=Aprile%2C+E">E. Aprile</a>, <a href="/search/hep-ex?searchtype=author&query=Ara%C3%BAjo%2C+H+M">H. M. Ara煤jo</a> , et al. (572 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.02309v1-abstract-short" style="display: inline;"> The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leading technology to cover the available parameter space for Weakly Interacting Massive Particles (WIMPs), while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neut… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.02309v1-abstract-full').style.display = 'inline'; document.getElementById('2203.02309v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.02309v1-abstract-full" style="display: none;"> The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leading technology to cover the available parameter space for Weakly Interacting Massive Particles (WIMPs), while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neutrinos through neutrinoless double-beta decay and through a variety of astrophysical sources. A next-generation xenon-based detector will therefore be a true multi-purpose observatory to significantly advance particle physics, nuclear physics, astrophysics, solar physics, and cosmology. This review article presents the science cases for such a detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.02309v1-abstract-full').style.display = 'none'; document.getElementById('2203.02309v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">77 pages, 40 figures, 1262 references</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> INT-PUB-22-003 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Phys. G: Nucl. Part. Phys. 50 (2023) 013001 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.12712">arXiv:2111.12712</a> <span> [<a href="https://arxiv.org/pdf/2111.12712">pdf</a>, <a href="https://arxiv.org/format/2111.12712">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.105.115005">10.1103/PhysRevD.105.115005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Strange Physics of Dark Baryons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alonso-%C3%81lvarez%2C+G">Gonzalo Alonso-脕lvarez</a>, <a href="/search/hep-ex?searchtype=author&query=Elor%2C+G">Gilly Elor</a>, <a href="/search/hep-ex?searchtype=author&query=Escudero%2C+M">Miguel Escudero</a>, <a href="/search/hep-ex?searchtype=author&query=Fornal%2C+B">Bartosz Fornal</a>, <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjam铆n Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Camalich%2C+J+M">Jorge Martin Camalich</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2111.12712v2-abstract-short" style="display: inline;"> Dark sector particles at the GeV scale carrying baryon number provide an attractive framework for understanding the origin of dark matter and the matter-antimatter asymmetry of the universe. We demonstrate that dark decays of hadronic states containing strange quarks -- hyperons -- offer excellent prospects for discovering such dark baryons. Building up on novel calculations of the matrix elements… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.12712v2-abstract-full').style.display = 'inline'; document.getElementById('2111.12712v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.12712v2-abstract-full" style="display: none;"> Dark sector particles at the GeV scale carrying baryon number provide an attractive framework for understanding the origin of dark matter and the matter-antimatter asymmetry of the universe. We demonstrate that dark decays of hadronic states containing strange quarks -- hyperons -- offer excellent prospects for discovering such dark baryons. Building up on novel calculations of the matrix elements relevant for hyperon dark decays, and in view of various collider, flavor, and astrophysical constraints, we determine the expected rates at hyperon factories like BESIII and LHCb. We also highlight the interesting theoretical connections of hyperon dark decays to the neutron lifetime anomaly and Mesogenesis. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.12712v2-abstract-full').style.display = 'none'; document.getElementById('2111.12712v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">24 pages, 14 figures, 12 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> TUM-HEP-1373/21, MITP-21-060 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 105, 115005 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.10285">arXiv:2108.10285</a> <span> [<a href="https://arxiv.org/pdf/2108.10285">pdf</a>, <a href="https://arxiv.org/format/2108.10285">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Lattice">hep-lat</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2022.137435">10.1016/j.physletb.2022.137435 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A novel determination of the $B_c$ lifetime </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aebischer%2C+J">Jason Aebischer</a>, <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjam铆n Grinstein</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.10285v2-abstract-short" style="display: inline;"> To reduce the current theory uncertainties a novel way to determine the $B_c$ lifetime, $蟿_{B_c}$, is proposed. Taking the difference of the $B_c$, and $B$ and $D$ meson decay rates eliminates the leading contributions from the calculation, which exhibit large scale and scheme dependence. The uncertainties in the proposed determination of $蟿_{B_c}$ are analyzed and improvements are proposed. The m… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.10285v2-abstract-full').style.display = 'inline'; document.getElementById('2108.10285v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.10285v2-abstract-full" style="display: none;"> To reduce the current theory uncertainties a novel way to determine the $B_c$ lifetime, $蟿_{B_c}$, is proposed. Taking the difference of the $B_c$, and $B$ and $D$ meson decay rates eliminates the leading contributions from the calculation, which exhibit large scale and scheme dependence. The uncertainties in the proposed determination of $蟿_{B_c}$ are analyzed and improvements are proposed. The method predicts a value of $蟿_{B_c}$ in tension with the experimental determination. Several explanations are considered, including underestimation of uncertainties, duality violation and new physics. We discuss quantitative evidence that our method is vitiated by duality violation in the large mass OPE used to calculate nonleptonic decay rates of $B$ and $D$ mesons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.10285v2-abstract-full').style.display = 'none'; document.getElementById('2108.10285v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 3 figures, matches published version</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.12738">arXiv:2103.12738</a> <span> [<a href="https://arxiv.org/pdf/2103.12738">pdf</a>, <a href="https://arxiv.org/format/2103.12738">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.104.035029">10.1103/PhysRevD.104.035029 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Implications of new evidence for lepton-universality violation in $b\to s\ell^+\ell^-$ decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Geng%2C+L">Li-Sheng Geng</a>, <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjam铆n Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=J%C3%A4ger%2C+S">Sebastian J盲ger</a>, <a href="/search/hep-ex?searchtype=author&query=Li%2C+S">Shuang-Yi Li</a>, <a href="/search/hep-ex?searchtype=author&query=Camalich%2C+J+M">Jorge Martin Camalich</a>, <a href="/search/hep-ex?searchtype=author&query=Shi%2C+R">Rui-Xiang Shi</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2103.12738v4-abstract-short" style="display: inline;"> Motivated by renewed evidence for new physics in $b \to s\ell\ell$ transitions in the form of LHCb's new measurements of theoretically clean lepton-universality ratios and the purely leptonic $B_s\to渭^+渭^-$ decay, we quantify the combined level of discrepancy with the Standard Model and fit values of short-distance Wilson coefficients. A combination of the clean observables $R_K$, $R_{K^*}$, and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.12738v4-abstract-full').style.display = 'inline'; document.getElementById('2103.12738v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.12738v4-abstract-full" style="display: none;"> Motivated by renewed evidence for new physics in $b \to s\ell\ell$ transitions in the form of LHCb's new measurements of theoretically clean lepton-universality ratios and the purely leptonic $B_s\to渭^+渭^-$ decay, we quantify the combined level of discrepancy with the Standard Model and fit values of short-distance Wilson coefficients. A combination of the clean observables $R_K$, $R_{K^*}$, and $B_s\to 渭渭$ alone results in a discrepancy with the Standard Model at $4.0蟽$, up from $3.5蟽$ in 2017. One-parameter scenarios with purely left-handed or with purely axial coupling to muons fit the data well and result in a $\sim 5 蟽$ pull from the Standard Model. In a two-parameter fit of %$C_9$ and $C_{10}$, new-physics contributions with both vector and axial-vector couplings to muons the allowed region is much more restricted than in 2017, principally due to the much more precise result on $B_s \to 渭^+ 渭^-$, which probes the axial coupling to muons.Including angular observables data restricts the allowed region further.A by-product of our analysis is an updated average of $\text{BR}(B_s \to 渭^+ 渭^-) = (2.8\pm 0.3) \times 10^{-9}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.12738v4-abstract-full').style.display = 'none'; document.getElementById('2103.12738v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">In the Appendix, we update the clean fits by considering the latest measurements of the branching fraction ratios $R_{K^0_s}$ and $R_{K^{*+}}$ by the LHCb Collaboration and show that two one-parameter scenarios and a two-parameter scenario fit the data well and result in a pull from the SM crossing the 5.0$蟽$ threshold</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 104, 035029 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.04240">arXiv:2005.04240</a> <span> [<a href="https://arxiv.org/pdf/2005.04240">pdf</a>, <a href="https://arxiv.org/format/2005.04240">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2020.135869">10.1016/j.physletb.2020.135869 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Dark Matter Capture by Atomic Nuclei </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Fornal%2C+B">Bartosz Fornal</a>, <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Zhao%2C+Y">Yue Zhao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2005.04240v1-abstract-short" style="display: inline;"> We propose a new strategy to search for a particular type of dark matter via nuclear capture. If the dark matter particle carries baryon number, as motivated by a class of theoretical explanations of the matter-antimatter asymmetry of the universe, it can mix with the neutron and be captured by an atomic nucleus. The resulting state de-excites by emitting a single photon or a cascade of photons wi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.04240v1-abstract-full').style.display = 'inline'; document.getElementById('2005.04240v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.04240v1-abstract-full" style="display: none;"> We propose a new strategy to search for a particular type of dark matter via nuclear capture. If the dark matter particle carries baryon number, as motivated by a class of theoretical explanations of the matter-antimatter asymmetry of the universe, it can mix with the neutron and be captured by an atomic nucleus. The resulting state de-excites by emitting a single photon or a cascade of photons with a total energy of up to several MeV. The exact value of this energy depends on the dark matter mass. We investigate the prospects for detecting dark matter capture signals in current and future neutrino and dark matter direct detection experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.04240v1-abstract-full').style.display = 'none'; document.getElementById('2005.04240v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 1 figure</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Lett. B 811 (2020) 135869 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.08498">arXiv:1905.08498</a> <span> [<a href="https://arxiv.org/pdf/1905.08498">pdf</a>, <a href="https://arxiv.org/format/1905.08498">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP12(2019)065">10.1007/JHEP12(2019)065 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Revisiting the new-physics interpretation of the $b\to c蟿谓$ data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Shi%2C+R">Rui-Xiang Shi</a>, <a href="/search/hep-ex?searchtype=author&query=Geng%2C+L">Li-Sheng Geng</a>, <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjam铆n Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=J%C3%A4ger%2C+S">Sebastian J盲ger</a>, <a href="/search/hep-ex?searchtype=author&query=Camalich%2C+J+M">Jorge Martin Camalich</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.08498v3-abstract-short" style="display: inline;"> We revisit the status of the new-physics interpretations of the anomalies in semileptonic $B$ decays in light of the new data reported by Belle on the lepton-universality ratios $R_{D^{(*)}}$ using the semileptonic tag and on the longitudinal polarization of the $D^*$ in $B\to D^*蟿谓$, $F_L^{D^*}$. The preferred solutions involve new left-handed currents or tensor contributions. Interpretations wit… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.08498v3-abstract-full').style.display = 'inline'; document.getElementById('1905.08498v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.08498v3-abstract-full" style="display: none;"> We revisit the status of the new-physics interpretations of the anomalies in semileptonic $B$ decays in light of the new data reported by Belle on the lepton-universality ratios $R_{D^{(*)}}$ using the semileptonic tag and on the longitudinal polarization of the $D^*$ in $B\to D^*蟿谓$, $F_L^{D^*}$. The preferred solutions involve new left-handed currents or tensor contributions. Interpretations with pure right-handed currents are disfavored by the LHC data, while pure scalar models are disfavored by the upper limits derived either from the LHC or from the $B_c$ lifetime. The observable $F_L^{D^*}$ also gives an important constraint leading to the exclusion of large regions of parameter space. Finally, we investigate the sensitivity of different observables to the various scenarios and conclude that a measurement of the tau polarization in the decay mode $B\to D蟿谓$ would effectively discriminate among them. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.08498v3-abstract-full').style.display = 'none'; document.getElementById('1905.08498v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">matches publised version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 12 (2019) 065 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1812.07638">arXiv:1812.07638</a> <span> [<a href="https://arxiv.org/pdf/1812.07638">pdf</a>, <a href="https://arxiv.org/format/1812.07638">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Opportunities in Flavour Physics at the HL-LHC and HE-LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Cerri%2C+A">A. Cerri</a>, <a href="/search/hep-ex?searchtype=author&query=Gligorov%2C+V+V">V. V. Gligorov</a>, <a href="/search/hep-ex?searchtype=author&query=Malvezzi%2C+S">S. Malvezzi</a>, <a href="/search/hep-ex?searchtype=author&query=Camalich%2C+J+M">J. Martin Camalich</a>, <a href="/search/hep-ex?searchtype=author&query=Zupan%2C+J">J. Zupan</a>, <a href="/search/hep-ex?searchtype=author&query=Akar%2C+S">S. Akar</a>, <a href="/search/hep-ex?searchtype=author&query=Alimena%2C+J">J. Alimena</a>, <a href="/search/hep-ex?searchtype=author&query=Allanach%2C+B+C">B. C. Allanach</a>, <a href="/search/hep-ex?searchtype=author&query=Altmannshofer%2C+W">W. Altmannshofer</a>, <a href="/search/hep-ex?searchtype=author&query=Anderlini%2C+L">L. Anderlini</a>, <a href="/search/hep-ex?searchtype=author&query=Archilli%2C+F">F. Archilli</a>, <a href="/search/hep-ex?searchtype=author&query=Azzi%2C+P">P. Azzi</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">S. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barter%2C+W">W. Barter</a>, <a href="/search/hep-ex?searchtype=author&query=Barton%2C+A+E">A. E. Barton</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Belyaev%2C+I">I. Belyaev</a>, <a href="/search/hep-ex?searchtype=author&query=Benson%2C+S">S. Benson</a>, <a href="/search/hep-ex?searchtype=author&query=Bettler%2C+M">M. Bettler</a>, <a href="/search/hep-ex?searchtype=author&query=Bhattacharya%2C+R">R. Bhattacharya</a>, <a href="/search/hep-ex?searchtype=author&query=Bifani%2C+S">S. Bifani</a>, <a href="/search/hep-ex?searchtype=author&query=Birnkraut%2C+A">A. Birnkraut</a>, <a href="/search/hep-ex?searchtype=author&query=Bishara%2C+F">F. Bishara</a>, <a href="/search/hep-ex?searchtype=author&query=Blake%2C+T">T. Blake</a>, <a href="/search/hep-ex?searchtype=author&query=Blusk%2C+S">S. Blusk</a> , et al. (278 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1812.07638v2-abstract-short" style="display: inline;"> Motivated by the success of the flavour physics programme carried out over the last decade at the Large Hadron Collider (LHC), we characterize in detail the physics potential of its High-Luminosity and High-Energy upgrades in this domain of physics. We document the extraordinary breadth of the HL/HE-LHC programme enabled by a putative Upgrade II of the dedicated flavour physics experiment LHCb and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.07638v2-abstract-full').style.display = 'inline'; document.getElementById('1812.07638v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1812.07638v2-abstract-full" style="display: none;"> Motivated by the success of the flavour physics programme carried out over the last decade at the Large Hadron Collider (LHC), we characterize in detail the physics potential of its High-Luminosity and High-Energy upgrades in this domain of physics. We document the extraordinary breadth of the HL/HE-LHC programme enabled by a putative Upgrade II of the dedicated flavour physics experiment LHCb and the evolution of the established flavour physics role of the ATLAS and CMS general purpose experiments. We connect the dedicated flavour physics programme to studies of the top quark, Higgs boson, and direct high-$p_T$ searches for new particles and force carriers. We discuss the complementarity of their discovery potential for physics beyond the Standard Model, affirming the necessity to fully exploit the LHC's flavour physics potential throughout its upgrade eras. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.07638v2-abstract-full').style.display = 'none'; document.getElementById('1812.07638v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Report from Working Group 4 on the Physics of the HL-LHC, and Perspectives at the HE-LHC, 292 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1704.05446">arXiv:1704.05446</a> <span> [<a href="https://arxiv.org/pdf/1704.05446">pdf</a>, <a href="https://arxiv.org/format/1704.05446">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.96.093006">10.1103/PhysRevD.96.093006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Towards the discovery of new physics with lepton-universality ratios of $b\to s\ell\ell$ decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Geng%2C+L">Li-Sheng Geng</a>, <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjam铆n Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=J%C3%A4ger%2C+S">Sebastian J盲ger</a>, <a href="/search/hep-ex?searchtype=author&query=Camalich%2C+J+M">Jorge Martin Camalich</a>, <a href="/search/hep-ex?searchtype=author&query=Ren%2C+X">Xiu-Lei Ren</a>, <a href="/search/hep-ex?searchtype=author&query=Shi%2C+R">Rui-Xiang Shi</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1704.05446v3-abstract-short" style="display: inline;"> Tests of lepton-universality as rate ratios in $b\to s \ell\ell$ transitions can be predicted very accurately in the Standard Model. The deficits with respect to expectations reported by the LHCb experiment in muon-to-electron ratios of the $B\to K^{(*)}\ell\ell$ decay rates thus point to genuine manifestations of lepton non-universal new physics. In this paper, we analyse these measurements in th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.05446v3-abstract-full').style.display = 'inline'; document.getElementById('1704.05446v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1704.05446v3-abstract-full" style="display: none;"> Tests of lepton-universality as rate ratios in $b\to s \ell\ell$ transitions can be predicted very accurately in the Standard Model. The deficits with respect to expectations reported by the LHCb experiment in muon-to-electron ratios of the $B\to K^{(*)}\ell\ell$ decay rates thus point to genuine manifestations of lepton non-universal new physics. In this paper, we analyse these measurements in the context of effective field theory. First, we discuss the interplay of the different operators in $R_K$ and $R_{K^*}$ and provide predictions for $R_{K^*}$ in the Standard Model and in new-physics scenarios that can explain $R_K$. We also provide approximate numerical formulas for these observables in bins of interest as functions of the relevant Wilson coefficients. Secondly, we perform frequentist fits to $R_{K}$ and $R_{K^*}$. The SM disagrees with these measurements at $3.7蟽$ significance. We find excellent fits in scenarios with combinations of $\mathcal O_{9(10)}^\ell=\bar s纬^渭b_L~\ell纬_渭(纬_5) \ell$ operators, with pulls relative to the Standard Model in the region of $4蟽$. An important conclusion of our analysis is that a lepton-specific contribution to $\mathcal O_{10}$ is essential to understand the data. Under the hypothesis that new-physics couples selectively to the muons, we also present fits to other $b\to s渭渭$ data with a conservative error assessment, and comment on more general scenarios. Finally, we discuss new lepton universality ratios that, if new physics is the origin of the observed discrepancy, should contribute to the statistically significant discovery of new physics in the near future. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.05446v3-abstract-full').style.display = 'none'; document.getElementById('1704.05446v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 January, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Matches published version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 96, 093006 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1611.06676">arXiv:1611.06676</a> <span> [<a href="https://arxiv.org/pdf/1611.06676">pdf</a>, <a href="https://arxiv.org/format/1611.06676">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.118.081802">10.1103/PhysRevLett.118.081802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The lifetime of the $B_c^-$ meson and the anomalies in $B\to D^{(*)}蟿谓$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alonso%2C+R">Rodrigo Alonso</a>, <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjam铆n Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Camalich%2C+J+M">Jorge Martin Camalich</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1611.06676v1-abstract-short" style="display: inline;"> We investigate a new constraint on new-physics interpretations of the anomalies observed in $B\to D^{(*)}蟿谓$ decays making use of the lifetime of the $B_c^-$ meson. A constraint is obtained by demanding that the rate for $B_c^-\to蟿^-\bar谓$ does not exceed the fraction of the total width that is allowed by the calculation of the lifetime in the standard model. This leads to a very strong bound on n… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.06676v1-abstract-full').style.display = 'inline'; document.getElementById('1611.06676v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1611.06676v1-abstract-full" style="display: none;"> We investigate a new constraint on new-physics interpretations of the anomalies observed in $B\to D^{(*)}蟿谓$ decays making use of the lifetime of the $B_c^-$ meson. A constraint is obtained by demanding that the rate for $B_c^-\to蟿^-\bar谓$ does not exceed the fraction of the total width that is allowed by the calculation of the lifetime in the standard model. This leads to a very strong bound on new-physics scenarios involving scalar operators since they lift the slight, but not negligible, chiral suppression of the $B_c^-\to蟿^-\bar谓$ amplitude in the standard model. The new constraint renders a scalar interpretation of the enhancement measured in $R_{D^*}$ implausible, including explanations implementing extra Higgs doublets or certain classes of leptoquarks. We also discuss the complementarity of $R_{D^{(*)}}$ and a measurement of the longitudinal polarization of the $蟿$ in the $B\to D^*蟿谓$ decay in light of our findings. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.06676v1-abstract-full').style.display = 'none'; document.getElementById('1611.06676v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 November, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 2 figs</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 118, 081802 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1509.05049">arXiv:1509.05049</a> <span> [<a href="https://arxiv.org/pdf/1509.05049">pdf</a>, <a href="https://arxiv.org/ps/1509.05049">ps</a>, <a href="https://arxiv.org/format/1509.05049">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Lattice">hep-lat</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.116.141801">10.1103/PhysRevLett.116.141801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Weak decays of unstable $b$-mesons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjam铆n Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Camalich%2C+J+M">Jorge Martin Camalich</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1509.05049v1-abstract-short" style="display: inline;"> We investigate the decays of the excited $(b\bar q)$ mesons as probes of the short-distance structure of the weak $螖B=1$ transitions. These states are unstable under the electromagnetic or strong interactions although their widths are typically suppressed by phase space. As compared to the pseudoscalar $B$ meson, the purely leptonic decays of the vector $B^*$ are not chirally suppressed and are se… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.05049v1-abstract-full').style.display = 'inline'; document.getElementById('1509.05049v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.05049v1-abstract-full" style="display: none;"> We investigate the decays of the excited $(b\bar q)$ mesons as probes of the short-distance structure of the weak $螖B=1$ transitions. These states are unstable under the electromagnetic or strong interactions although their widths are typically suppressed by phase space. As compared to the pseudoscalar $B$ meson, the purely leptonic decays of the vector $B^*$ are not chirally suppressed and are sensitive to different combinations of the underlying weak effective operators. An interesting example is $B^*_s\to \ell^+\ell^-$, which has a rate that can be accurately predicted in the standard model. The branching fraction is $\mathcal{B}\sim10^{-11}$, irrespective of the lepton flavor and where the main uncertainty stems from the unmeasured and theoretically not-well known $B_s^*$ width. We discuss the prospects for producing this decay mode at the LHC and explore the possibility of measuring the $B_s^*\to\ell\ell$ amplitude, instead, through scattering experiments at the $B_s^*$ resonance peak. Finally we also discuss the charged-current $B_{u,c}^*\to\ell谓$ decay which can provide complementary information on the $b\to u\ell谓$ and $b\to c\ell谓$ transitions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.05049v1-abstract-full').style.display = 'none'; document.getElementById('1509.05049v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 116, 141801 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1501.05283">arXiv:1501.05283</a> <span> [<a href="https://arxiv.org/pdf/1501.05283">pdf</a>, <a href="https://arxiv.org/format/1501.05283">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> TASI-2013 Lectures on Flavor Physics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1501.05283v1-abstract-short" style="display: inline;"> A somewhat eclectic choice of topics: Review of Flavor in the quark sector of the SM, the appearance of the CKM matrix and determination of its elements, FCNCs, the GIM mechanism. Minimal Flavor Violation. A close look at neutral meson mixing. CP asymmetries. Effective Field Theory in Weak interactions. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1501.05283v1-abstract-full" style="display: none;"> A somewhat eclectic choice of topics: Review of Flavor in the quark sector of the SM, the appearance of the CKM matrix and determination of its elements, FCNCs, the GIM mechanism. Minimal Flavor Violation. A close look at neutral meson mixing. CP asymmetries. Effective Field Theory in Weak interactions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.05283v1-abstract-full').style.display = 'none'; document.getElementById('1501.05283v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Lectures on Flavor Physics delivered at TASI 2013</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1308.2143">arXiv:1308.2143</a> <span> [<a href="https://arxiv.org/pdf/1308.2143">pdf</a>, <a href="https://arxiv.org/format/1308.2143">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Muon Collider Higgs Factory for Snowmass 2013 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexahin%2C+Y">Yuri Alexahin</a>, <a href="/search/hep-ex?searchtype=author&query=Ankenbrandt%2C+C+M">Charles M. Ankenbrandt</a>, <a href="/search/hep-ex?searchtype=author&query=Cline%2C+D+B">David B. Cline</a>, <a href="/search/hep-ex?searchtype=author&query=Conway%2C+A">Alexander Conway</a>, <a href="/search/hep-ex?searchtype=author&query=Cummings%2C+M+A">Mary Anne Cummings</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Benedetto%2C+V">Vito Di Benedetto</a>, <a href="/search/hep-ex?searchtype=author&query=Eichten%2C+E">Estia Eichten</a>, <a href="/search/hep-ex?searchtype=author&query=Gatto%2C+C">Corrado Gatto</a>, <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Gunion%2C+J">Jack Gunion</a>, <a href="/search/hep-ex?searchtype=author&query=Han%2C+T">Tao Han</a>, <a href="/search/hep-ex?searchtype=author&query=Hanson%2C+G">Gail Hanson</a>, <a href="/search/hep-ex?searchtype=author&query=Hill%2C+C+T">Christopher T. Hill</a>, <a href="/search/hep-ex?searchtype=author&query=Ignatov%2C+F">Fedor Ignatov</a>, <a href="/search/hep-ex?searchtype=author&query=Johnson%2C+R+P">Rolland P. Johnson</a>, <a href="/search/hep-ex?searchtype=author&query=Lebedev%2C+V">Valeri Lebedev</a>, <a href="/search/hep-ex?searchtype=author&query=Lipton%2C+R">Ron Lipton</a>, <a href="/search/hep-ex?searchtype=author&query=Liu%2C+Z">Zhen Liu</a>, <a href="/search/hep-ex?searchtype=author&query=Markiewicz%2C+T">Tom Markiewicz</a>, <a href="/search/hep-ex?searchtype=author&query=Mazzacane%2C+A">Anna Mazzacane</a>, <a href="/search/hep-ex?searchtype=author&query=Mokhov%2C+N">Nikolai Mokhov</a>, <a href="/search/hep-ex?searchtype=author&query=Nagaitsev%2C+S">Sergei Nagaitsev</a>, <a href="/search/hep-ex?searchtype=author&query=Neuffer%2C+D">David Neuffer</a>, <a href="/search/hep-ex?searchtype=author&query=Palmer%2C+M">Mark Palmer</a>, <a href="/search/hep-ex?searchtype=author&query=Purohit%2C+M+V">Milind V. Purohit</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1308.2143v1-abstract-short" style="display: inline;"> We propose the construction of, and describe in detail, a compact Muon Collider s-channel Higgs Factory. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1308.2143v1-abstract-full" style="display: none;"> We propose the construction of, and describe in detail, a compact Muon Collider s-channel Higgs Factory. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1308.2143v1-abstract-full').style.display = 'none'; document.getElementById('1308.2143v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 August, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">43 pages, 20 figures, 10 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-CONF-13-245-T </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1203.4410">arXiv:1203.4410</a> <span> [<a href="https://arxiv.org/pdf/1203.4410">pdf</a>, <a href="https://arxiv.org/format/1203.4410">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP09(2012)005">10.1007/JHEP09(2012)005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> An expansion for Neutrino Phenomenology </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Trott%2C+M">Michael Trott</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1203.4410v2-abstract-short" style="display: inline;"> We develop a formalism for constructing the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) matrix and neutrino masses using an expansion that originates when a sequence of heavy right handed neutrinos are integrated out, assuming a seesaw mechanism for the origin of neutrino masses. The expansion establishes relationships between the structure of the PMNS matrix and the mass differences of neutrinos, and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1203.4410v2-abstract-full').style.display = 'inline'; document.getElementById('1203.4410v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1203.4410v2-abstract-full" style="display: none;"> We develop a formalism for constructing the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) matrix and neutrino masses using an expansion that originates when a sequence of heavy right handed neutrinos are integrated out, assuming a seesaw mechanism for the origin of neutrino masses. The expansion establishes relationships between the structure of the PMNS matrix and the mass differences of neutrinos, and allows symmetry implications for measured deviations from tri-bimaximal form to be studied systematically. Our approach does not depend on choosing the rotation between the weak and mass eigenstates of the charged lepton fields to be diagonal. We comment on using this expansion to examine the symmetry implications of the recent results from the Daya-Bay collaboration reporting the discovery of a non zero value for theta_{13}, indicating a deviation from tri-bimaximal form, with a significance of 5.2 sigma. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1203.4410v2-abstract-full').style.display = 'none'; document.getElementById('1203.4410v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 August, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 March, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pp, 1 figure v2: Jhep version, more exposition/description,results unchanged</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-PH-TH/2012-069 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1108.4027">arXiv:1108.4027</a> <span> [<a href="https://arxiv.org/pdf/1108.4027">pdf</a>, <a href="https://arxiv.org/format/1108.4027">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP10(2011)072">10.1007/JHEP10(2011)072 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Flavor Symmetric Sectors and Collider Physics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Kagan%2C+A+L">Alexander L. Kagan</a>, <a href="/search/hep-ex?searchtype=author&query=Trott%2C+M">Michael Trott</a>, <a href="/search/hep-ex?searchtype=author&query=Zupan%2C+J">Jure Zupan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1108.4027v1-abstract-short" style="display: inline;"> We discuss the phenomenology of effective field theories with new scalar or vector representations of the Standard Model quark flavor symmetry group, allowing for large flavor breaking involving the third generation. Such field content can have a relatively low mass scale \lesssim TeV and O(1) couplings to quarks, while being naturally consistent with both flavor violating and flavor diagonal cons… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1108.4027v1-abstract-full').style.display = 'inline'; document.getElementById('1108.4027v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1108.4027v1-abstract-full" style="display: none;"> We discuss the phenomenology of effective field theories with new scalar or vector representations of the Standard Model quark flavor symmetry group, allowing for large flavor breaking involving the third generation. Such field content can have a relatively low mass scale \lesssim TeV and O(1) couplings to quarks, while being naturally consistent with both flavor violating and flavor diagonal constraints. These theories therefore have the potential for early discovery at LHC, and provide a flavor safe "tool box" for addressing anomalies at colliders and low energy experiments. We catalogue the possible flavor symmetric representations, and consider applications to the anomalous Tevatron t-tbar forward backward asymmetry and B_s mixing measurements, individually or concurrently. Collider signatures and constraints on flavor symmetric models are also studied more generally. In our examination of the t-tbar forward backward asymmetry we determine model independent acceptance corrections appropriate for comparing against CDF data that can be applied to any model seeking to explain the t-tbar forward backward asymmetry. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1108.4027v1-abstract-full').style.display = 'none'; document.getElementById('1108.4027v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 August, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">71 pages, 14 Figures, 12 Tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UCHEP-11-06 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1102.4011">arXiv:1102.4011</a> <span> [<a href="https://arxiv.org/pdf/1102.4011">pdf</a>, <a href="https://arxiv.org/ps/1102.4011">ps</a>, <a href="https://arxiv.org/format/1102.4011">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Theory">hep-th</span> </div> </div> <p class="title is-5 mathjax"> What if? On the interplay between Serendipity, Intuition and Conjecture </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1102.4011v1-abstract-short" style="display: inline;"> While the Standard Model is in good shape, there are many reasons to believe it is incomplete. There are high expectations that the LHC will shed light on some well studied possibilities, like technicolor and supersymmetry. Emboldened by this optimism, we consider some non-mainstream ideas that if established would change dramatically the way we view the world. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1102.4011v1-abstract-full" style="display: none;"> While the Standard Model is in good shape, there are many reasons to believe it is incomplete. There are high expectations that the LHC will shed light on some well studied possibilities, like technicolor and supersymmetry. Emboldened by this optimism, we consider some non-mainstream ideas that if established would change dramatically the way we view the world. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1102.4011v1-abstract-full').style.display = 'none'; document.getElementById('1102.4011v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 February, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Talk give at the conference on Flavor Physics and CP Violation - FPCP 2010, May 25-29, 2010, Turin, Italy</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UCSD/PTH 10-15 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> PoS FPCP2010:060,2010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1102.3374">arXiv:1102.3374</a> <span> [<a href="https://arxiv.org/pdf/1102.3374">pdf</a>, <a href="https://arxiv.org/format/1102.3374">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.107.012002">10.1103/PhysRevLett.107.012002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Forward-backward asymmetry in t anti-t production from flavour symmetries </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Kagan%2C+A+L">Alexander L. Kagan</a>, <a href="/search/hep-ex?searchtype=author&query=Trott%2C+M">Michael Trott</a>, <a href="/search/hep-ex?searchtype=author&query=Zupan%2C+J">Jure Zupan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1102.3374v2-abstract-short" style="display: inline;"> We show that the forward-backward asymmetry in top quark pair production can be enhanced by fields that transform nontrivially under the flavour group and satisfy Minimal Flavour Violation, while at the same time the constraints from associated effects on the d 蟽(t anti-t)/d M_{t anti-t} distribution, dijet resonance searches, same sign top pair production and other phenomenology are satisfied. We… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1102.3374v2-abstract-full').style.display = 'inline'; document.getElementById('1102.3374v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1102.3374v2-abstract-full" style="display: none;"> We show that the forward-backward asymmetry in top quark pair production can be enhanced by fields that transform nontrivially under the flavour group and satisfy Minimal Flavour Violation, while at the same time the constraints from associated effects on the d 蟽(t anti-t)/d M_{t anti-t} distribution, dijet resonance searches, same sign top pair production and other phenomenology are satisfied. We work out two examples in detail, one where a scalar colour anti-sextet field, that is also an anti-sextet of SU(3)_U, enhances the forward-backward asymmetry, and one where the enhancement arises from a vector colour octet field that is also an octet of SU(3)_U. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1102.3374v2-abstract-full').style.display = 'none'; document.getElementById('1102.3374v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 May, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 February, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 3 figures, v2: PRL version, scalar numerics fixed, conclusions unchanged</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UCHEP-11-11 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.107:012002,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1009.2049">arXiv:1009.2049</a> <span> [<a href="https://arxiv.org/pdf/1009.2049">pdf</a>, <a href="https://arxiv.org/format/1009.2049">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Theory">hep-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP11(2010)067">10.1007/JHEP11(2010)067 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Low Scale Flavor Gauge Symmetries </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjam铆n Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Redi%2C+M">Michele Redi</a>, <a href="/search/hep-ex?searchtype=author&query=Villadoro%2C+G">Giovanni Villadoro</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1009.2049v3-abstract-short" style="display: inline;"> We study the possibility of gauging the Standard Model flavor group. Anomaly cancellation leads to the addition of fermions whose mass is inversely proportional to the known fermion masses. In this case all flavor violating effects turn out to be controlled roughly by the Standard Model Yukawa, suppressing transitions for the light generations. Due to the inverted hierarchy the scale of new gauge… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1009.2049v3-abstract-full').style.display = 'inline'; document.getElementById('1009.2049v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1009.2049v3-abstract-full" style="display: none;"> We study the possibility of gauging the Standard Model flavor group. Anomaly cancellation leads to the addition of fermions whose mass is inversely proportional to the known fermion masses. In this case all flavor violating effects turn out to be controlled roughly by the Standard Model Yukawa, suppressing transitions for the light generations. Due to the inverted hierarchy the scale of new gauge flavor bosons could be as low as the electroweak scale without violating any existing bound but accessible at the Tevatron and the LHC. The mechanism of flavor protection potentially provides an alternative to Minimal Flavor Violation, with flavor violating effects suppressed by hierarchy of scales rather than couplings. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1009.2049v3-abstract-full').style.display = 'none'; document.getElementById('1009.2049v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 January, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 September, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2010. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">24 pages + appendices; v2) Refs. added and numerical examples improved. Results unchanged; v3) small typos in appendix B corrected</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-PH-TH/2010-202, UCSD PTH/10-07 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 1011:067,2010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ph/0510104">arXiv:hep-ph/0510104</a> <span> [<a href="https://arxiv.org/pdf/hep-ph/0510104">pdf</a>, <a href="https://arxiv.org/ps/hep-ph/0510104">ps</a>, <a href="https://arxiv.org/format/hep-ph/0510104">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.73.014013">10.1103/PhysRevD.73.014013 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The CP asymmetry in B^0(t) -> K_S 蟺^0 纬in the Standard Model </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Pirjol%2C+D">Dan Pirjol</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="hep-ph/0510104v3-abstract-short" style="display: inline;"> The time-dependent CP asymmetry in exclusive B^0(t) -> K^{*0}纬decays has been proposed as a probe of new physics in B decays. Recently, this method was extended to radiative decays into multibody hadronic final states such as B^0(t)-> K_S蟺^0纬and B^0(t)-> 蟺^+蟺^-纬. The CP asymmetry in these decays vanishes to the extent that the photon is completely polarized. In the Standard Model, the photon emi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/0510104v3-abstract-full').style.display = 'inline'; document.getElementById('hep-ph/0510104v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ph/0510104v3-abstract-full" style="display: none;"> The time-dependent CP asymmetry in exclusive B^0(t) -> K^{*0}纬decays has been proposed as a probe of new physics in B decays. Recently, this method was extended to radiative decays into multibody hadronic final states such as B^0(t)-> K_S蟺^0纬and B^0(t)-> 蟺^+蟺^-纬. The CP asymmetry in these decays vanishes to the extent that the photon is completely polarized. In the Standard Model, the photon emitted in b-> s纬has high left-handed polarization, but right-handed contamination enters already at leading order in 螞/m_b even for vanishing light quark masses. We compute here the magnitude of this effect and the time dependent CP asymmetry parameter S_{K_S 蟺^0纬}. We find that the Standard Model can easily accomodate values of S as large as 10%, but a precise value cannot be obtained at present because of strong interactions uncertainties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/0510104v3-abstract-full').style.display = 'none'; document.getElementById('hep-ph/0510104v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 January, 2006; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 October, 2005; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2005. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 4 figures. Final version to appear in Physical Review D</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UCSD/PTH 05-12, MIT-CTP 3674 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.D73:014013,2006 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ph/0504209">arXiv:hep-ph/0504209</a> <span> [<a href="https://arxiv.org/pdf/hep-ph/0504209">pdf</a>, <a href="https://arxiv.org/ps/hep-ph/0504209">ps</a>, <a href="https://arxiv.org/format/hep-ph/0504209">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Lattice">hep-lat</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.95.071802">10.1103/PhysRevLett.95.071802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Precision Model Independent Determination of |Vub| from B -> pi e nu </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Arnesen%2C+M+C">M. Christian Arnesen</a>, <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Ben Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Rothstein%2C+I+Z">Ira Z. Rothstein</a>, <a href="/search/hep-ex?searchtype=author&query=Stewart%2C+I+W">Iain W. Stewart</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="hep-ph/0504209v1-abstract-short" style="display: inline;"> A precision method for determining |Vub| using the full range in q^2 of B-> pi \ell nu data is presented. At large q^2 the form factor is taken from unquenched lattice QCD, at q^2=0 we impose a model independent constraint obtained from B-> pi pi using the soft-collinear effective theory, and the shape is constrained using QCD dispersion relations. We find |Vub| =(3.54\pm 0.17\pm 0.44) x 10^{-3}… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/0504209v1-abstract-full').style.display = 'inline'; document.getElementById('hep-ph/0504209v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ph/0504209v1-abstract-full" style="display: none;"> A precision method for determining |Vub| using the full range in q^2 of B-> pi \ell nu data is presented. At large q^2 the form factor is taken from unquenched lattice QCD, at q^2=0 we impose a model independent constraint obtained from B-> pi pi using the soft-collinear effective theory, and the shape is constrained using QCD dispersion relations. We find |Vub| =(3.54\pm 0.17\pm 0.44) x 10^{-3}. With 5% experimental error and 12% theory error, this is competitive with inclusive methods. Theory error is dominated by the input points, with negligible uncertainty from the dispersion relations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/0504209v1-abstract-full').style.display = 'none'; document.getElementById('hep-ph/0504209v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 April, 2005; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2005. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> MIT-CTP 3620, CMU-HEP-0504, UCSD-PTH-05-04 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett. 95 (2005) 071802 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ph/0412019">arXiv:hep-ph/0412019</a> <span> [<a href="https://arxiv.org/pdf/hep-ph/0412019">pdf</a>, <a href="https://arxiv.org/ps/hep-ph/0412019">ps</a>, <a href="https://arxiv.org/format/hep-ph/0412019">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.71.011504">10.1103/PhysRevD.71.011504 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The photon polarization in B -> X gamma in the standard model </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Grossman%2C+Y">Yuval Grossman</a>, <a href="/search/hep-ex?searchtype=author&query=Ligeti%2C+Z">Zoltan Ligeti</a>, <a href="/search/hep-ex?searchtype=author&query=Pirjol%2C+D">Dan Pirjol</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="hep-ph/0412019v2-abstract-short" style="display: inline;"> The standard model prediction for the $B\to X_{s,d}纬$ decay amplitude with a right-handed photon is believed to be tiny, suppressed by $m_{s,d}/m_b$, compared to the amplitude with a left-handed photon. We show that this suppression is fictitious: in inclusive decays, the ratio of these two amplitudes is only suppressed by $g_s/(4蟺)$, and in exclusive decays by $螞_{QCD}/m_b$. The suppression is… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/0412019v2-abstract-full').style.display = 'inline'; document.getElementById('hep-ph/0412019v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ph/0412019v2-abstract-full" style="display: none;"> The standard model prediction for the $B\to X_{s,d}纬$ decay amplitude with a right-handed photon is believed to be tiny, suppressed by $m_{s,d}/m_b$, compared to the amplitude with a left-handed photon. We show that this suppression is fictitious: in inclusive decays, the ratio of these two amplitudes is only suppressed by $g_s/(4蟺)$, and in exclusive decays by $螞_{QCD}/m_b$. The suppression is not stronger in $B\to X_d纬$ decays than it is in $B\to X_s纬$. We estimate that the time dependent CP asymmetries in $B\to K^*纬$, $蟻纬$, $K_S蟺^0纬$, and $蟺^+蟺^-纬$ are of order 0.1 and that they have significant uncertainties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/0412019v2-abstract-full').style.display = 'none'; document.getElementById('hep-ph/0412019v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 December, 2004; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 December, 2004; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2004. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Clarifications in the exclusive section, references added</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UCSD/PTH 04-21, LBNL-56648, MIT-CTP 3571 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.D71:011504,2005 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ph/0212164">arXiv:hep-ph/0212164</a> <span> [<a href="https://arxiv.org/pdf/hep-ph/0212164">pdf</a>, <a href="https://arxiv.org/ps/hep-ph/0212164">ps</a>, <a href="https://arxiv.org/format/hep-ph/0212164">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.68.054002">10.1103/PhysRevD.68.054002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Detector resolution effects on hadronic mass moments in B -> X l nu </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+C+W">Christian W. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="hep-ph/0212164v2-abstract-short" style="display: inline;"> We show how to relate moments of the reconstructed hadronic invariant mass distribution to the moments of the physical spectrum in a model independent way. The only information needed on detector resolution functions are their first few moments. Theoretical predictions for the first three moments as functions of non-perturbative parameters are given for various lepton energy cuts. </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ph/0212164v2-abstract-full" style="display: none;"> We show how to relate moments of the reconstructed hadronic invariant mass distribution to the moments of the physical spectrum in a model independent way. The only information needed on detector resolution functions are their first few moments. Theoretical predictions for the first three moments as functions of non-perturbative parameters are given for various lepton energy cuts. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/0212164v2-abstract-full').style.display = 'none'; document.getElementById('hep-ph/0212164v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 July, 2003; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 December, 2002; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2002. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Some details as well as one reference added. Version to be published in PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UCSD/PTH 02-28 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev. D68 (2003) 054002 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ph/0208034">arXiv:hep-ph/0208034</a> <span> [<a href="https://arxiv.org/pdf/hep-ph/0208034">pdf</a>, <a href="https://arxiv.org/ps/hep-ph/0208034">ps</a>, <a href="https://arxiv.org/format/hep-ph/0208034">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.67.014010">10.1103/PhysRevD.67.014010 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Testing factorization in B -> D(*)X decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+C+W">C. W. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">B. Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Pirjol%2C+D">D. Pirjol</a>, <a href="/search/hep-ex?searchtype=author&query=Stewart%2C+I+W">I. W. Stewart</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="hep-ph/0208034v2-abstract-short" style="display: inline;"> In QCD the amplitude for B0 -> D(*)+pi- factorizes in the large Nc limit or in the large energy limit Q >> Lambda_QCD where Q = {m_b, m_c, m_b-m_c}. Data also suggests factorization in exclusive processes B-> D* pi+ pi- pi- pi0 and B-> D* omega pi-, however by themselves neither large Nc nor large Q can account for this. Noting that the condition for large energy release in B0-> D+ pi- is enforc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/0208034v2-abstract-full').style.display = 'inline'; document.getElementById('hep-ph/0208034v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ph/0208034v2-abstract-full" style="display: none;"> In QCD the amplitude for B0 -> D(*)+pi- factorizes in the large Nc limit or in the large energy limit Q >> Lambda_QCD where Q = {m_b, m_c, m_b-m_c}. Data also suggests factorization in exclusive processes B-> D* pi+ pi- pi- pi0 and B-> D* omega pi-, however by themselves neither large Nc nor large Q can account for this. Noting that the condition for large energy release in B0-> D+ pi- is enforced by the SV limit, m_b, m_c >> m_b-m_c >> Lambda, we propose that the combined large Nc and SV limits justify factorization in B -> D(*) X. This combined limit is tested with the inclusive decay spectrum measured by CLEO. We also give exact large Nc relations among isospin amplitudes for B -> D(*)X and B -> D(*) D-bar(*)X, which can be used to test factorization through exclusive or inclusive measurements. Predictions for the modes B-> D(*) pi pi, B-> D(*)K K-bar and B-> D(*) D-bar(*) K are discussed using available data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/0208034v2-abstract-full').style.display = 'none'; document.getElementById('hep-ph/0208034v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 August, 2002; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 August, 2002; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2002. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 3 included .eps figures, minor changes</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UCSD/PTH 02-17, INT-PUB 02-43 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.D67:014010,2003 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ph/0111392">arXiv:hep-ph/0111392</a> <span> [<a href="https://arxiv.org/pdf/hep-ph/0111392">pdf</a>, <a href="https://arxiv.org/ps/hep-ph/0111392">ps</a>, <a href="https://arxiv.org/format/hep-ph/0111392">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/S0370-2693(01)01517-9">10.1016/S0370-2693(01)01517-9 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Heavy quark symmetry in B -> D(*) ell nu spectra </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Ligeti%2C+Z">Zoltan Ligeti</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="hep-ph/0111392v2-abstract-short" style="display: inline;"> We calculate heavy quark symmetry breaking in the slopes and curvatures of the $B\to D^{(*)}\ell\bar谓$ spectra at zero recoil, including the order $伪_s^2尾_0$ corrections. We point out that the theoretical uncertainties in the differences between $B\to D$ and $B\to D^*$ slopes and curvatures are smaller than in the deviations of the slopes and curvatures themselves from their infinite mass limits… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/0111392v2-abstract-full').style.display = 'inline'; document.getElementById('hep-ph/0111392v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ph/0111392v2-abstract-full" style="display: none;"> We calculate heavy quark symmetry breaking in the slopes and curvatures of the $B\to D^{(*)}\ell\bar谓$ spectra at zero recoil, including the order $伪_s^2尾_0$ corrections. We point out that the theoretical uncertainties in the differences between $B\to D$ and $B\to D^*$ slopes and curvatures are smaller than in the deviations of the slopes and curvatures themselves from their infinite mass limits. We find that the central values of the current experimental results for the difference of the slopes differ from our calculations when QCD sum rules are used to estimate subleading Isgur-Wise functions. A better understanding of the shapes of the $B\to D^{(*)}\ell\bar谓$ spectra may also help to reduce the error of $|V_{cb}|$ extracted from the zero recoil limit of $B\to D^*\ell\bar谓$. We argue that heavy quark symmetry requires that the same fitting procedure be used in the experimental determinations of the shape parameters and $|V_{cb}|$ from the $B\to D\ell\bar谓$ and $B\to D^{*}\ell\bar谓$ spectra. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/0111392v2-abstract-full').style.display = 'none'; document.getElementById('hep-ph/0111392v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 February, 2004; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 November, 2001; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2001. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LBNL-49173, UCSD/PTH 01-20 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Lett.B526:345-354,2002; Erratum-ibid.B601:236-237,2004 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ph/9910245">arXiv:hep-ph/9910245</a> <span> [<a href="https://arxiv.org/pdf/hep-ph/9910245">pdf</a>, <a href="https://arxiv.org/ps/hep-ph/9910245">ps</a>, <a href="https://arxiv.org/format/hep-ph/9910245">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.84.4545">10.1103/PhysRevLett.84.4545 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Method For Extracting cos伪 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Grinstein%2C+B">Benjamin Grinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Nolte%2C+D+R">Detlef R. Nolte</a>, <a href="/search/hep-ex?searchtype=author&query=Rothstein%2C+I+Z">Ira Z. Rothstein</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="hep-ph/9910245v1-abstract-short" style="display: inline;"> We show that it is possible to extract the weak mixing angle alpha via a measurement of the rate for B^+(-) -> 蟺^+(-) e^+e^-. The sensitivity to cos(alpha) results from the interference between the long and short distance contributions. The short distance contribution can be computed, using heavy quark symmetry, in terms of semi-leptonic form factors. More importantly, we show that, using Ward i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/9910245v1-abstract-full').style.display = 'inline'; document.getElementById('hep-ph/9910245v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ph/9910245v1-abstract-full" style="display: none;"> We show that it is possible to extract the weak mixing angle alpha via a measurement of the rate for B^+(-) -> 蟺^+(-) e^+e^-. The sensitivity to cos(alpha) results from the interference between the long and short distance contributions. The short distance contribution can be computed, using heavy quark symmetry, in terms of semi-leptonic form factors. More importantly, we show that, using Ward identities and a short distance operator product expansion, the long distance contribution can be calculated without recourse to light cone wave functions when the invariant mass of the lepton pair, q^2, is much larger than LQCDs. We find that for q^2 > 2 GeV^2 the branching fraction is approximately 1 * 10^{-8}|V_{td}/0.008|^2. The shape of the differential rate is very sensitive to the value of cos(alpha) at small values of q^2 with dGamma /dq^2 varying up to 50% in the interval -1< cos(alpha)< 1 at q^2= 2 GeV^2. The size of the variation depends upon the ratio V_{ub}/V_{td}. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ph/9910245v1-abstract-full').style.display = 'none'; document.getElementById('hep-ph/9910245v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 October, 1999; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 1999. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages,2 figures, Latex</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UCSD/PTH 99--15 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.84:4545-4548,2000 </p> </li> 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