Properties of jet fragmentation using charged particles measured with the ATLAS detector in pp collisions at root s=13 TeV
AffiliationUniv Arizona, Dept Phys
MetadataShow full item record
PublisherAMER PHYSICAL SOC
CitationCollaboration, A. T. L. A. S., Barton, A. E., Bertram, I. A., Bouhova-Thacker, E. V., Fox, H., Henderson, R. C. W., ... & Muenstermann, D. (2019). Properties of jet fragmentation using charged particles measured with the ATLAS detector in pp collisions at√ s= 13 TeV. Physical Review D, 100(5).
JournalPHYSICAL REVIEW D
Rights© 2019 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
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AbstractThis paper presents a measurement of quantities related to the formation of jets from high-energy quarks and gluons (fragmentation). Jets with transverse momentum 100 GeV < p(T) < 2.5 TeV and pseudorapidity vertical bar eta vertical bar < 2.1 from an integrated luminosity of 33 fb(-1) of root s = 13 TeV proton-proton collisions are reconstructed with the ATLAS detector at the Large Hadron Collider. Charged-particle tracks with p(T) > 500 MeV and vertical bar eta vertical bar < 2.5 are used to probe the detailed structure of the jet. The fragmentation properties of the more forward and the more central of the two leading jets from each event are studied. The data are unfolded to correct for detector resolution and acceptance effects. Comparisons with parton shower Monte Carlo generators indicate that existing models provide a reasonable description of the data across a wide range of phase space, but there are also significant differences. Furthermore, the data are interpreted in the context of quark- and gluon-initiated jets by exploiting the rapidity dependence of the jet flavor fraction. A first measurement of the charged-particle multiplicity using model-independent jet labels (topic modeling) provides a promising alternative to traditional quark and gluon extractions using input from simulation. The simulations provide a reasonable description of the quark-like data across the jet p(T) range presented in-this measurement, but the gluon-like data have systematically fewer charged particles than the simulation.
NoteOpen access article
VersionFinal published version
SponsorsCERN; ANPCyT, ArgentinaANPCyT; YerPhI, Armenia; ARC, Australia, Australian Research Council; BMWFW; FWF, AustriaAustrian Science Fund (FWF); ANAS, Azerbaijan National Academy of Sciences (ANAS); SSTC, Belarus; CNPq, National Council for Scientific and Technological Development (CNPq); FAPESP, BrazilFundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); NSERCNatural Sciences and Engineering Research Council of Canada; CFI, CanadaCanada Foundation for Innovation; CONICYTComision Nacional de Investigacion Cientifica y Tecnologica (CONICYT); NSFC, ChinaNational Natural Science Foundation of China; COLCIENCIAS, ColombiaDepartamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias; MSMT CRMinistry of Education, Youth & Sports - Czech Republic; MPO CR; VSC CR, Czech RepublicCzech Republic Government; DNRF; DNSRC, DenmarkDanish Natural Science Research Council; IN2P3-CNRS, CEA-DRF/IRFU, France; BMBFFederal Ministry of Education & Research (BMBF); MPG, GermanyMax Planck Society; GSRT, GreeceGreek Ministry of Development-GSRT; RGC, Hong Kong SAR, ChinaHong Kong Research Grants Council; ISFIsrael Science Foundation; Benoziyo Center, Israel; INFN, ItalyIstituto Nazionale di Fisica Nucleare; MEXTMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT); JSPS, JapanMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSWMinistry of Science and Higher Education, Poland; NCN, Poland; FCT, PortugalFundacao para a Ciencia e a Tecnologia (FCT); MNE/IFA, Romania; NRC KI, Russian Federation; MESTD, Serbia; MSSR, Slovakia; ARRSSlovenian Research Agency - Slovenia; MIZS, Slovenia; MINECO, Spain; Wallenberg Foundation, Sweden; SNSFSwiss National Science Foundation (SNSF); MOST, TaiwanMinistry of Science and Technology, Taiwan; TAEK, TurkeyMinistry of Energy & Natural Resources - Turkey; STFC, United KingdomScience & Technology Facilities Council (STFC); DOEUnited States Department of Energy (DOE); NSFNational Science Foundation (NSF); BCKDF; CANARIE; COST, ERC; ERDFEuropean Union (EU); Marie Sklodowska-Curie Actions, European UnionEuropean Union (EU); Investissements d' Avenir LabexFrench National Research Agency (ANR); ANR, FranceFrench National Research Agency (ANR); DFGGerman Research Foundation (DFG); AvH Foundation, Germany, Alexander von Humboldt Foundation; EU-ESFEuropean Union (EU); Greek NSRF, Greece; BSF-NSF; GIF, Israel, German-Israeli Foundation for Scientific Research and Development; CERCA Programme Generalitat de Catalunya, Spain; Royal Society of London; Leverhulme Trust, United KingdomLeverhulme Trust; NDGF (Denmark, Norway, Sweden); KIT/GridKA (Germany); INFN-CNAF (Italy); NL-Tl (Netherlands), PIC (Spain); ASGC (Taiwan); BNL (USA)