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<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/2406.11937">arXiv:2406.11937</a> <span> [<a href="https://arxiv.org/pdf/2406.11937">pdf</a>, <a href="https://arxiv.org/format/2406.11937">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="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</span> </div> </div> <p class="title is-5 mathjax"> Using graph neural networks to reconstruct charged pion showers in the CMS High Granularity Calorimeter </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aamir%2C+M">M. Aamir</a>, <a href="/search/physics?searchtype=author&query=Acar%2C+B">B. Acar</a>, <a href="/search/physics?searchtype=author&query=Adamov%2C+G">G. Adamov</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+T">T. Adams</a>, <a href="/search/physics?searchtype=author&query=Adloff%2C+C">C. Adloff</a>, <a href="/search/physics?searchtype=author&query=Afanasiev%2C+S">S. Afanasiev</a>, <a href="/search/physics?searchtype=author&query=Agrawal%2C+C">C. Agrawal</a>, <a href="/search/physics?searchtype=author&query=Agrawal%2C+C">C. Agrawal</a>, <a href="/search/physics?searchtype=author&query=Ahmad%2C+A">A. Ahmad</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+H+A">H. A. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Akbar%2C+S">S. Akbar</a>, <a href="/search/physics?searchtype=author&query=Akchurin%2C+N">N. Akchurin</a>, <a href="/search/physics?searchtype=author&query=Akgul%2C+B">B. Akgul</a>, <a href="/search/physics?searchtype=author&query=Akgun%2C+B">B. Akgun</a>, <a href="/search/physics?searchtype=author&query=Akpinar%2C+R+O">R. O. Akpinar</a>, <a href="/search/physics?searchtype=author&query=Aktas%2C+E">E. Aktas</a>, <a href="/search/physics?searchtype=author&query=AlKadhim%2C+A">A. AlKadhim</a>, <a href="/search/physics?searchtype=author&query=Alexakhin%2C+V">V. Alexakhin</a>, <a href="/search/physics?searchtype=author&query=Alimena%2C+J">J. Alimena</a>, <a href="/search/physics?searchtype=author&query=Alison%2C+J">J. Alison</a>, <a href="/search/physics?searchtype=author&query=Alpana%2C+A">A. Alpana</a>, <a href="/search/physics?searchtype=author&query=Alshehri%2C+W">W. Alshehri</a>, <a href="/search/physics?searchtype=author&query=Dominguez%2C+P+A">P. Alvarez Dominguez</a>, <a href="/search/physics?searchtype=author&query=Alyari%2C+M">M. Alyari</a>, <a href="/search/physics?searchtype=author&query=Amendola%2C+C">C. Amendola</a> , et al. (550 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="2406.11937v2-abstract-short" style="display: inline;"> A novel method to reconstruct the energy of hadronic showers in the CMS High Granularity Calorimeter (HGCAL) is presented. The HGCAL is a sampling calorimeter with very fine transverse and longitudinal granularity. The active media are silicon sensors and scintillator tiles readout by SiPMs and the absorbers are a combination of lead and Cu/CuW in the electromagnetic section, and steel in the hadr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.11937v2-abstract-full').style.display = 'inline'; document.getElementById('2406.11937v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.11937v2-abstract-full" style="display: none;"> A novel method to reconstruct the energy of hadronic showers in the CMS High Granularity Calorimeter (HGCAL) is presented. The HGCAL is a sampling calorimeter with very fine transverse and longitudinal granularity. The active media are silicon sensors and scintillator tiles readout by SiPMs and the absorbers are a combination of lead and Cu/CuW in the electromagnetic section, and steel in the hadronic section. The shower reconstruction method is based on graph neural networks and it makes use of a dynamic reduction network architecture. It is shown that the algorithm is able to capture and mitigate the main effects that normally hinder the reconstruction of hadronic showers using classical reconstruction methods, by compensating for fluctuations in the multiplicity, energy, and spatial distributions of the shower's constituents. The performance of the algorithm is evaluated using test beam data collected in 2018 prototype of the CMS HGCAL accompanied by a section of the CALICE AHCAL prototype. The capability of the method to mitigate the impact of energy leakage from the calorimeter is also demonstrated. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.11937v2-abstract-full').style.display = 'none'; document.getElementById('2406.11937v2-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> 30 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </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">Prepared for submission to JINST</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.06582">arXiv:2309.06582</a> <span> [<a href="https://arxiv.org/pdf/2309.06582">pdf</a>, <a href="https://arxiv.org/format/2309.06582">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</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"> Electron Energy Regression in the CMS High-Granularity Calorimeter Prototype </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rusack%2C+R">Roger Rusack</a>, <a href="/search/physics?searchtype=author&query=Joshi%2C+B">Bhargav Joshi</a>, <a href="/search/physics?searchtype=author&query=Alpana%2C+A">Alpana Alpana</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+S">Seema Sharma</a>, <a href="/search/physics?searchtype=author&query=Vadnais%2C+T">Thomas Vadnais</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="2309.06582v1-abstract-short" style="display: inline;"> We present a new publicly available dataset that contains simulated data of a novel calorimeter to be installed at the CERN Large Hadron Collider. This detector will have more than six-million channels with each channel capable of position, ionisation and precision time measurement. Reconstructing these events in an efficient way poses an immense challenge which is being addressed with the latest… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.06582v1-abstract-full').style.display = 'inline'; document.getElementById('2309.06582v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.06582v1-abstract-full" style="display: none;"> We present a new publicly available dataset that contains simulated data of a novel calorimeter to be installed at the CERN Large Hadron Collider. This detector will have more than six-million channels with each channel capable of position, ionisation and precision time measurement. Reconstructing these events in an efficient way poses an immense challenge which is being addressed with the latest machine learning techniques. As part of this development a large prototype with 12,000 channels was built and a beam of high-energy electrons incident on it. Using machine learning methods we have reconstructed the energy of incident electrons from the energies of three-dimensional hits, which is known to some precision. By releasing this data publicly we hope to encourage experts in the application of machine learning to develop efficient and accurate image reconstruction of these electrons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.06582v1-abstract-full').style.display = 'none'; document.getElementById('2309.06582v1-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> 12 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2023. </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, 6 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2211.04740">arXiv:2211.04740</a> <span> [<a href="https://arxiv.org/pdf/2211.04740">pdf</a>, <a href="https://arxiv.org/format/2211.04740">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> </div> </div> <p class="title is-5 mathjax"> Performance of the CMS High Granularity Calorimeter prototype to charged pion beams of 20$-$300 GeV/c </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Acar%2C+B">B. Acar</a>, <a href="/search/physics?searchtype=author&query=Adamov%2C+G">G. Adamov</a>, <a href="/search/physics?searchtype=author&query=Adloff%2C+C">C. Adloff</a>, <a href="/search/physics?searchtype=author&query=Afanasiev%2C+S">S. Afanasiev</a>, <a href="/search/physics?searchtype=author&query=Akchurin%2C+N">N. Akchurin</a>, <a href="/search/physics?searchtype=author&query=Akg%C3%BCn%2C+B">B. Akg眉n</a>, <a href="/search/physics?searchtype=author&query=Alhusseini%2C+M">M. Alhusseini</a>, <a href="/search/physics?searchtype=author&query=Alison%2C+J">J. Alison</a>, <a href="/search/physics?searchtype=author&query=de+Almeida%2C+J+P+F+d+s+S">J. P. Figueiredo de sa Sousa de Almeida</a>, <a href="/search/physics?searchtype=author&query=de+Almeida%2C+P+G+D">P. G. Dias de Almeida</a>, <a href="/search/physics?searchtype=author&query=Alpana%2C+A">A. Alpana</a>, <a href="/search/physics?searchtype=author&query=Alyari%2C+M">M. Alyari</a>, <a href="/search/physics?searchtype=author&query=Andreev%2C+I">I. Andreev</a>, <a href="/search/physics?searchtype=author&query=Aras%2C+U">U. Aras</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Atakisi%2C+I+O">I. O. Atakisi</a>, <a href="/search/physics?searchtype=author&query=Bach%2C+O">O. Bach</a>, <a href="/search/physics?searchtype=author&query=Baden%2C+A">A. Baden</a>, <a href="/search/physics?searchtype=author&query=Bakas%2C+G">G. Bakas</a>, <a href="/search/physics?searchtype=author&query=Bakshi%2C+A">A. Bakshi</a>, <a href="/search/physics?searchtype=author&query=Banerjee%2C+S">S. Banerjee</a>, <a href="/search/physics?searchtype=author&query=DeBarbaro%2C+P">P. DeBarbaro</a>, <a href="/search/physics?searchtype=author&query=Bargassa%2C+P">P. Bargassa</a>, <a href="/search/physics?searchtype=author&query=Barney%2C+D">D. Barney</a>, <a href="/search/physics?searchtype=author&query=Beaudette%2C+F">F. Beaudette</a> , et al. (435 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="2211.04740v2-abstract-short" style="display: inline;"> The upgrade of the CMS experiment for the high luminosity operation of the LHC comprises the replacement of the current endcap calorimeter by a high granularity sampling calorimeter (HGCAL). The electromagnetic section of the HGCAL is based on silicon sensors interspersed between lead and copper (or copper tungsten) absorbers. The hadronic section uses layers of stainless steel as an absorbing med… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.04740v2-abstract-full').style.display = 'inline'; document.getElementById('2211.04740v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.04740v2-abstract-full" style="display: none;"> The upgrade of the CMS experiment for the high luminosity operation of the LHC comprises the replacement of the current endcap calorimeter by a high granularity sampling calorimeter (HGCAL). The electromagnetic section of the HGCAL is based on silicon sensors interspersed between lead and copper (or copper tungsten) absorbers. The hadronic section uses layers of stainless steel as an absorbing medium and silicon sensors as an active medium in the regions of high radiation exposure, and scintillator tiles directly readout by silicon photomultipliers in the remaining regions. As part of the development of the detector and its readout electronic components, a section of a silicon-based HGCAL prototype detector along with a section of the CALICE AHCAL prototype was exposed to muons, electrons and charged pions in beam test experiments at the H2 beamline at the CERN SPS in October 2018. The AHCAL uses the same technology as foreseen for the HGCAL but with much finer longitudinal segmentation. The performance of the calorimeters in terms of energy response and resolution, longitudinal and transverse shower profiles is studied using negatively charged pions, and is compared to GEANT4 predictions. This is the first report summarizing results of hadronic showers measured by the HGCAL prototype using beam test data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.04740v2-abstract-full').style.display = 'none'; document.getElementById('2211.04740v2-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 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">Accepted for publication by JINST</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.06855">arXiv:2111.06855</a> <span> [<a href="https://arxiv.org/pdf/2111.06855">pdf</a>, <a href="https://arxiv.org/format/2111.06855">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="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/10.1088/1748-0221/17/05/P05022">10.1088/1748-0221/17/05/P05022 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Response of a CMS HGCAL silicon-pad electromagnetic calorimeter prototype to 20-300 GeV positrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Acar%2C+B">B. Acar</a>, <a href="/search/physics?searchtype=author&query=Adamov%2C+G">G. Adamov</a>, <a href="/search/physics?searchtype=author&query=Adloff%2C+C">C. Adloff</a>, <a href="/search/physics?searchtype=author&query=Afanasiev%2C+S">S. Afanasiev</a>, <a href="/search/physics?searchtype=author&query=Akchurin%2C+N">N. Akchurin</a>, <a href="/search/physics?searchtype=author&query=Akg%C3%BCn%2C+B">B. Akg眉n</a>, <a href="/search/physics?searchtype=author&query=Khan%2C+F+A">F. Alam Khan</a>, <a href="/search/physics?searchtype=author&query=Alhusseini%2C+M">M. Alhusseini</a>, <a href="/search/physics?searchtype=author&query=Alison%2C+J">J. Alison</a>, <a href="/search/physics?searchtype=author&query=Alpana%2C+A">A. Alpana</a>, <a href="/search/physics?searchtype=author&query=Altopp%2C+G">G. Altopp</a>, <a href="/search/physics?searchtype=author&query=Alyari%2C+M">M. Alyari</a>, <a href="/search/physics?searchtype=author&query=An%2C+S">S. An</a>, <a href="/search/physics?searchtype=author&query=Anagul%2C+S">S. Anagul</a>, <a href="/search/physics?searchtype=author&query=Andreev%2C+I">I. Andreev</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Atakisi%2C+I+O">I. O. Atakisi</a>, <a href="/search/physics?searchtype=author&query=Bach%2C+O">O. Bach</a>, <a href="/search/physics?searchtype=author&query=Baden%2C+A">A. Baden</a>, <a href="/search/physics?searchtype=author&query=Bakas%2C+G">G. Bakas</a>, <a href="/search/physics?searchtype=author&query=Bakshi%2C+A">A. Bakshi</a>, <a href="/search/physics?searchtype=author&query=Bannerjee%2C+S">S. Bannerjee</a>, <a href="/search/physics?searchtype=author&query=Bargassa%2C+P">P. Bargassa</a>, <a href="/search/physics?searchtype=author&query=Barney%2C+D">D. Barney</a>, <a href="/search/physics?searchtype=author&query=Beaudette%2C+F">F. Beaudette</a> , et al. (364 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="2111.06855v3-abstract-short" style="display: inline;"> The Compact Muon Solenoid Collaboration is designing a new high-granularity endcap calorimeter, HGCAL, to be installed later this decade. As part of this development work, a prototype system was built, with an electromagnetic section consisting of 14 double-sided structures, providing 28 sampling layers. Each sampling layer has an hexagonal module, where a multipad large-area silicon sensor is glu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.06855v3-abstract-full').style.display = 'inline'; document.getElementById('2111.06855v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.06855v3-abstract-full" style="display: none;"> The Compact Muon Solenoid Collaboration is designing a new high-granularity endcap calorimeter, HGCAL, to be installed later this decade. As part of this development work, a prototype system was built, with an electromagnetic section consisting of 14 double-sided structures, providing 28 sampling layers. Each sampling layer has an hexagonal module, where a multipad large-area silicon sensor is glued between an electronics circuit board and a metal baseplate. The sensor pads of approximately 1 cm$^2$ are wire-bonded to the circuit board and are readout by custom integrated circuits. The prototype was extensively tested with beams at CERN's Super Proton Synchrotron in 2018. Based on the data collected with beams of positrons, with energies ranging from 20 to 300 GeV, measurements of the energy resolution and linearity, the position and angular resolutions, and the shower shapes are presented and compared to a detailed Geant4 simulation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.06855v3-abstract-full').style.display = 'none'; document.getElementById('2111.06855v3-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 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </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 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