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2026-02-19
Momentum Measurement of Charged Particles in FASER's Emulsion Detector at the LHC
FASER CollaborationRoshan Mammen AbrahamXiaocong AiSaul Alonso MonsalveJohn AndersEmma Kate AndersonClaire AntelAkitaka ArigaTomoko ArigaJeremy AtkinsonFlorian U. BernlochnerTobias BoeckhEliot BornandJamie BoydLydia BrennerAngela BurgerFranck CadouxRoberto CardellaDavid W. CasperCharlotte CavanaghShiyang ChenXin ChenXing ChengKohei ChinoneDhruv ChouhanAndrea CoccaroStephane DébieuxAnsh DesaiSergey DmitrievskyRadu DobreMonica D'OnofrioSinead EleyYannick FavreJonathan L. FengCarlo Alberto FenoglioDidier FerrereMax FiegWissal FilaliElena FiruHaruhi FujimoriEdward GalantayAli GarabagluStephen GibsonSergio Gonzalez-SevillaYuri GornushkinYotam GranovJinjing GuCarl GwilliamElie HammouDaiki HayakawaMichael HolzbockShih-Chieh HsuZhen HuGiuseppe IacobucciTomohiro InadaLuca IodiceSune JakobsenCesar Jesus-VallsArash JofreheiHans JoosEnrique KajomovitzTakumi KanaiHiroaki KawaharaAlex KeykenFelix KlingDaniela KöckPantelis KontaxakisJelle KoornUmut KosePeter KrackSusanne KuehnThanushan KugathasanSebastian LaudageLorne LevinsonBotao LiJinfeng LiuYi LiuMargaret S. LutzJack MacDonaldJoern MahlstedtToni MäkeläAnna MascellaniLawson McCoyJosh McFaydenAndrea Pizarro MedinaThéo MorettiKeiko MoriyamaToshiyuki NakanoLaurie NevayMotoya NonakaYuma OharaKen OhashiKazuaki OkuiHidetoshi OtonoLorenzo PaolozziAnnabelle ParryPawan PawanBrian PetersenTiti PredaMarkus PrimJunkai QinMichaela Queitsch-MaitlandJuan RojoHiroki RokujoAndré RubbiaOsamu SatoPaola ScampoliKristof SchmiedenMatthias SchottCristiano SebastianiAnna SfyrlaDavide SgalabernaMansoora ShamimYosuke TakuboNoshin TarannumSimon ThorEric TorrenceOscar Ivan Valdes MartinezSvetlana VasinaBenedikt VormwaldChi WangYuxiao WangEli WelchAaron WhiteMonika WielersBenjamin James WilsonYue XuHeng YangLekai YaoDaichi YoshikawaStefano ZambitoShunliang ZhangYuxuan ZhangXingyu ZhaoZijian Zhao
文献摘要
We present a momentum measurement method based on multiple Coulomb scattering (MCS) in the FASER emulsion detector. The measurement of charged-particle momenta is essential for studying neutrino interactions in the TeV energy range at the FASER experiment. This method exploits the sub-micron spatial resolution and long tracking length of the FASER detector, enabling momentum determination from a few GeV up to a few TeV. The performance was evaluated using Geant4-based Monte Carlo simulations and validated with muon test beam data in the momentum range 100-300 GeV. As a first probe of the method for higher momentum muons, background muons recorded by the FASER detector were examined, showing reconstructed momenta consistent with expectations from their angular spread.
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