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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/1105.0320">arXiv:1105.0320</a> <span> [<a href="https://arxiv.org/pdf/1105.0320">pdf</a>, <a href="https://arxiv.org/ps/1105.0320">ps</a>, <a href="https://arxiv.org/format/1105.0320">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 - 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.107.082004">10.1103/PhysRevLett.107.082004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Precise measurement of the top quark mass in the dilepton channel at D0 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=D0+Collaboration"> D0 Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abazov%2C+V+M">V. M. Abazov</a>, <a href="/search/hep-ex?searchtype=author&query=Abbott%2C+B">B. Abbott</a>, <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+B+S">B. S. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Adams%2C+M">M. Adams</a>, <a href="/search/hep-ex?searchtype=author&query=Adams%2C+T">T. Adams</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alkhazov%2C+G">G. Alkhazov</a>, <a href="/search/hep-ex?searchtype=author&query=Alton%2C+A">A. Alton</a>, <a href="/search/hep-ex?searchtype=author&query=Alverson%2C+G">G. Alverson</a>, <a href="/search/hep-ex?searchtype=author&query=Alves%2C+G+A">G. A. Alves</a>, <a href="/search/hep-ex?searchtype=author&query=Ancu%2C+L+S">L. S. Ancu</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+M">M. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Arov%2C+M">M. Arov</a>, <a href="/search/hep-ex?searchtype=author&query=Askew%2C+A">A. Askew</a>, <a href="/search/hep-ex?searchtype=author&query=%C3%85sman%2C+B">B. 脜sman</a>, <a href="/search/hep-ex?searchtype=author&query=Atramentov%2C+O">O. Atramentov</a>, <a href="/search/hep-ex?searchtype=author&query=Avila%2C+C">C. Avila</a>, <a href="/search/hep-ex?searchtype=author&query=BackusMayes%2C+J">J. BackusMayes</a>, <a href="/search/hep-ex?searchtype=author&query=Badaud%2C+F">F. Badaud</a>, <a href="/search/hep-ex?searchtype=author&query=Bagby%2C+L">L. Bagby</a>, <a href="/search/hep-ex?searchtype=author&query=Baldin%2C+B">B. Baldin</a>, <a href="/search/hep-ex?searchtype=author&query=Bandurin%2C+D+V">D. V. Bandurin</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">S. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barberis%2C+E">E. Barberis</a> , et al. (397 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="1105.0320v2-abstract-short" style="display: inline;"> We measure the top quark mass (mt) in ppbar collisions at a center of mass energy of 1.96 TeV using dilepton ttbar->W+bW-bbar->l+nubl-nubarbbar events, where l denotes an electron, a muon, or a tau that decays leptonically. The data correspond to an integrated luminosity of 5.4 fb-1 collected with the D0 detector at the Fermilab Tevatron Collider. We obtain mt = 174.0 +- 1.8(stat) +- 2.4(syst) GeV… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1105.0320v2-abstract-full').style.display = 'inline'; document.getElementById('1105.0320v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1105.0320v2-abstract-full" style="display: none;"> We measure the top quark mass (mt) in ppbar collisions at a center of mass energy of 1.96 TeV using dilepton ttbar->W+bW-bbar->l+nubl-nubarbbar events, where l denotes an electron, a muon, or a tau that decays leptonically. The data correspond to an integrated luminosity of 5.4 fb-1 collected with the D0 detector at the Fermilab Tevatron Collider. We obtain mt = 174.0 +- 1.8(stat) +- 2.4(syst) GeV, which is in agreement with the current world average mt = 173.3 +- 1.1 GeV. This is currently the most precise measurement of mt in the dilepton channel. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1105.0320v2-abstract-full').style.display = 'none'; document.getElementById('1105.0320v2-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 August, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 May, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">7 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-11-203-E </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 107, 082004 (2011) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1011.6549">arXiv:1011.6549</a> <span> [<a href="https://arxiv.org/pdf/1011.6549">pdf</a>, <a href="https://arxiv.org/ps/1011.6549">ps</a>, <a href="https://arxiv.org/format/1011.6549">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 - 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.83.032009">10.1103/PhysRevD.83.032009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the W boson helicity in top quark decays using 5.4 fb^-1 of ppbar collision data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abazov%2C+V+M">V. M. Abazov</a>, <a href="/search/hep-ex?searchtype=author&query=Abbott%2C+B">B. Abbott</a>, <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+B+S">B. S. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Adams%2C+M">M. Adams</a>, <a href="/search/hep-ex?searchtype=author&query=Adams%2C+T">T. Adams</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alkhazov%2C+G">G. Alkhazov</a>, <a href="/search/hep-ex?searchtype=author&query=Altona%2C+A">A. Altona</a>, <a href="/search/hep-ex?searchtype=author&query=Alverson%2C+G">G. Alverson</a>, <a href="/search/hep-ex?searchtype=author&query=Alves%2C+G+A">G. A. Alves</a>, <a href="/search/hep-ex?searchtype=author&query=Ancu%2C+L+S">L. S. Ancu</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+M">M. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Arnoud%2C+Y">Y. Arnoud</a>, <a href="/search/hep-ex?searchtype=author&query=Arov%2C+M">M. Arov</a>, <a href="/search/hep-ex?searchtype=author&query=Askew%2C+A">A. Askew</a>, <a href="/search/hep-ex?searchtype=author&query=Asman%2C+B">B. Asman</a>, <a href="/search/hep-ex?searchtype=author&query=Atramentov%2C+O">O. Atramentov</a>, <a href="/search/hep-ex?searchtype=author&query=Avila%2C+C">C. Avila</a>, <a href="/search/hep-ex?searchtype=author&query=BackusMayes%2C+J">J. BackusMayes</a>, <a href="/search/hep-ex?searchtype=author&query=Badaud%2C+F">F. Badaud</a>, <a href="/search/hep-ex?searchtype=author&query=Bagby%2C+L">L. Bagby</a>, <a href="/search/hep-ex?searchtype=author&query=Baldin%2C+B">B. Baldin</a>, <a href="/search/hep-ex?searchtype=author&query=Bandurin%2C+D+V">D. V. Bandurin</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">S. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barberis%2C+E">E. Barberis</a> , et al. (403 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="1011.6549v2-abstract-short" style="display: inline;"> We present a measurement of the helicity of the W boson produced in top quark decays using ttbar decays in the l+jets and dilepton final states selected from a sample of 5.4 fb^-1 of collisions recorded using the D0 detector at the Fermilab Tevatron ppbar collider. We measure the fractions of longitudinal and right-handed W bosons to be f_0 = 0.669 +- 0.102 [ +- 0.078 (stat.) +- 0.065 (syst.)] and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1011.6549v2-abstract-full').style.display = 'inline'; document.getElementById('1011.6549v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1011.6549v2-abstract-full" style="display: none;"> We present a measurement of the helicity of the W boson produced in top quark decays using ttbar decays in the l+jets and dilepton final states selected from a sample of 5.4 fb^-1 of collisions recorded using the D0 detector at the Fermilab Tevatron ppbar collider. We measure the fractions of longitudinal and right-handed W bosons to be f_0 = 0.669 +- 0.102 [ +- 0.078 (stat.) +- 0.065 (syst.)] and f_+ = 0.023 +- 0.053 [+- 0.041 (stat.) +- 0.034 (syst.)], respectively. This result is consistent at the 98% level with the standard model. A measurement with f_0 fixed to the value from the standard model yields f_+ = 0.010 +- 0.037 [+- 0.022 (stat.) +- 0.030 (syst.) ]. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1011.6549v2-abstract-full').style.display = 'none'; document.getElementById('1011.6549v2-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 September, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 November, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">To be submitted to Phys. Rev. D</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Fermilab-Pub-10/484-E </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.D83:032009,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1009.5950">arXiv:1009.5950</a> <span> [<a href="https://arxiv.org/pdf/1009.5950">pdf</a>, <a href="https://arxiv.org/ps/1009.5950">ps</a>, <a href="https://arxiv.org/format/1009.5950">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 - 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/j.physletb.2010.12.052">10.1016/j.physletb.2010.12.052 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for pair production of the scalar top quark in the electron-muon final state </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abazov%2C+V+M">V. M. Abazov</a>, <a href="/search/hep-ex?searchtype=author&query=Abbott%2C+B">B. Abbott</a>, <a href="/search/hep-ex?searchtype=author&query=Abolins%2C+M">M. Abolins</a>, <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+B+S">B. S. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Adams%2C+M">M. Adams</a>, <a href="/search/hep-ex?searchtype=author&query=Adams%2C+T">T. Adams</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alkhazov%2C+G">G. Alkhazov</a>, <a href="/search/hep-ex?searchtype=author&query=Altona%2C+A">A. Altona</a>, <a href="/search/hep-ex?searchtype=author&query=Alverson%2C+G">G. Alverson</a>, <a href="/search/hep-ex?searchtype=author&query=Alves%2C+G+A">G. A. Alves</a>, <a href="/search/hep-ex?searchtype=author&query=Ancu%2C+L+S">L. S. Ancu</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+M">M. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Arnoud%2C+Y">Y. Arnoud</a>, <a href="/search/hep-ex?searchtype=author&query=Arov%2C+M">M. Arov</a>, <a href="/search/hep-ex?searchtype=author&query=Askew%2C+A">A. Askew</a>, <a href="/search/hep-ex?searchtype=author&query=%C3%85sman%2C+B">B. 脜sman</a>, <a href="/search/hep-ex?searchtype=author&query=Atramentov%2C+O">O. Atramentov</a>, <a href="/search/hep-ex?searchtype=author&query=Avila%2C+C">C. Avila</a>, <a href="/search/hep-ex?searchtype=author&query=BackusMayes%2C+J">J. BackusMayes</a>, <a href="/search/hep-ex?searchtype=author&query=Badaud%2C+F">F. Badaud</a>, <a href="/search/hep-ex?searchtype=author&query=Bagby%2C+L">L. Bagby</a>, <a href="/search/hep-ex?searchtype=author&query=Baldin%2C+B">B. Baldin</a>, <a href="/search/hep-ex?searchtype=author&query=Bandurin%2C+D+V">D. V. Bandurin</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">S. Banerjee</a> , et al. (406 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="1009.5950v1-abstract-short" style="display: inline;"> We report the result of a search for the pair production of the lightest supersymmetric partner of the top quark ($\tilde{t}_1$) in $p\bar{p}$ collisions at a center-of-mass energy of 1.96 TeV at the Fermilab Tevatron collider corresponding to an integrated luminosity of 5.4 fb$^{-1}$. The scalar top quarks are assumed to decay into a $b$ quark, a charged lepton, and a scalar neutrino (… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1009.5950v1-abstract-full').style.display = 'inline'; document.getElementById('1009.5950v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1009.5950v1-abstract-full" style="display: none;"> We report the result of a search for the pair production of the lightest supersymmetric partner of the top quark ($\tilde{t}_1$) in $p\bar{p}$ collisions at a center-of-mass energy of 1.96 TeV at the Fermilab Tevatron collider corresponding to an integrated luminosity of 5.4 fb$^{-1}$. The scalar top quarks are assumed to decay into a $b$ quark, a charged lepton, and a scalar neutrino ($\tilde谓$), and the search is performed in the electron plus muon final state. No significant excess of events above the standard model prediction is detected, and improved exclusion limits at the 95% C.L. are set in the the ($M_{\tilde{t}_1}$,$M_{\tilde谓}$) mass plane. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1009.5950v1-abstract-full').style.display = 'none'; document.getElementById('1009.5950v1-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> 29 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">Report number:</span> FERMILAB-PUB-10-393-E </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Lett.B696:321-327,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1009.5686">arXiv:1009.5686</a> <span> [<a href="https://arxiv.org/pdf/1009.5686">pdf</a>, <a href="https://arxiv.org/ps/1009.5686">ps</a>, <a href="https://arxiv.org/format/1009.5686">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 - 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.106.022001">10.1103/PhysRevLett.106.022001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Determination of the width of the top quark </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abazov%2C+V+M">V. M. Abazov</a>, <a href="/search/hep-ex?searchtype=author&query=Abbott%2C+B">B. Abbott</a>, <a href="/search/hep-ex?searchtype=author&query=Abolins%2C+M">M. Abolins</a>, <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+B+S">B. S. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Adams%2C+M">M. Adams</a>, <a href="/search/hep-ex?searchtype=author&query=Adams%2C+T">T. Adams</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alkhazov%2C+G">G. Alkhazov</a>, <a href="/search/hep-ex?searchtype=author&query=Altona%2C+A">A. Altona</a>, <a href="/search/hep-ex?searchtype=author&query=Alverson%2C+G">G. Alverson</a>, <a href="/search/hep-ex?searchtype=author&query=Alves%2C+G+A">G. A. Alves</a>, <a href="/search/hep-ex?searchtype=author&query=Ancu%2C+L+S">L. S. Ancu</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+M">M. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Arnoud%2C+Y">Y. Arnoud</a>, <a href="/search/hep-ex?searchtype=author&query=Arov%2C+M">M. Arov</a>, <a href="/search/hep-ex?searchtype=author&query=Askew%2C+A">A. Askew</a>, <a href="/search/hep-ex?searchtype=author&query=%C3%85sman%2C+B">B. 脜sman</a>, <a href="/search/hep-ex?searchtype=author&query=Atramentov%2C+O">O. Atramentov</a>, <a href="/search/hep-ex?searchtype=author&query=Avila%2C+C">C. Avila</a>, <a href="/search/hep-ex?searchtype=author&query=BackusMayes%2C+J">J. BackusMayes</a>, <a href="/search/hep-ex?searchtype=author&query=Badaud%2C+F">F. Badaud</a>, <a href="/search/hep-ex?searchtype=author&query=Bagby%2C+L">L. Bagby</a>, <a href="/search/hep-ex?searchtype=author&query=Baldin%2C+B">B. Baldin</a>, <a href="/search/hep-ex?searchtype=author&query=Bandurin%2C+D+V">D. V. Bandurin</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">S. Banerjee</a> , et al. (406 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="1009.5686v1-abstract-short" style="display: inline;"> We extract the total width of the top quark, Gamma_t, from the partial decay width Gamma(t -> W b) measured using the t-channel cross section for single top quark production and from the branching fraction B(t -> W b) measured in ttbar events using up to 2.3 fb^-1 of integrated luminosity collected by the D0 Collaboration at the Tevatron ppbar Collider. The result is Gamma_t = 1.99 +0.69 -0.55 GeV… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1009.5686v1-abstract-full').style.display = 'inline'; document.getElementById('1009.5686v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1009.5686v1-abstract-full" style="display: none;"> We extract the total width of the top quark, Gamma_t, from the partial decay width Gamma(t -> W b) measured using the t-channel cross section for single top quark production and from the branching fraction B(t -> W b) measured in ttbar events using up to 2.3 fb^-1 of integrated luminosity collected by the D0 Collaboration at the Tevatron ppbar Collider. The result is Gamma_t = 1.99 +0.69 -0.55 GeV, which translates to a top-quark lifetime of tau_t = (3.3 +1.3 -0.9) x 10^-25 s. Assuming a high mass fourth generation b' quark and unitarity of the four-generation quark-mixing matrix, we set the first upper limit on |Vtb'| < 0.63 at 95% C.L. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1009.5686v1-abstract-full').style.display = 'none'; document.getElementById('1009.5686v1-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, 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">submitted to Phys. Rev. Letters</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-10/394-E </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.106:022001,2011 </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact 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