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Transverse momentum spectra of inclusive b jets in pPb collisions at √sNN = 5.02 TeV

Khachatryan, V. and Anderson, D. and Apresyan, A. and Bornheim, A. and Bunn, J. and Chen, Y. and Duarte, J. and Mott, A. and Newman, H. B. and Pena, C. and Pierini, M. and Spiropulu, M. and Vlimant, J. R. and Xie, S. and Zhu, R. Y. (2016) Transverse momentum spectra of inclusive b jets in pPb collisions at √sNN = 5.02 TeV. Physics Letters B, 754 . pp. 59-80. ISSN 0370-2693. http://resolver.caltech.edu/CaltechAUTHORS:20160401-080656780

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Abstract

We present a measurement of b jet transverse momentum (p_T) spectra in proton-lead (pPb) collisions using a dataset corresponding to about 35 nb^(−1) collected with the CMS detector at the LHC. Jets from b quark fragmentation are found by exploiting the long lifetime of hadrons containing a b quark through tagging methods using distributions of the secondary vertex mass and displacement. Extracted cross sections for b jets are scaled by the effective number of nucleon–nucleon collisions and are compared to a reference obtained from pythia simulations of pp collisions. The pythia-based estimate of the nuclear modification factor is found to be 1.22±0.15(stat+syst pPb)±0.27(syst PYTHIA) averaged over all jets with p_T between 55 and c400 GeV/c and with |η_(lab)|<2. We also compare this result to predictions from models using perturbative calculations in quantum chromodynamics.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.physletb.2016.01.010DOIArticle
http://www.sciencedirect.com/science/article/pii/S0370269316000149PublisherArticle
http://arxiv.org/abs/1510.03373arXivDiscussion Paper
ORCID:
AuthorORCID
Spiropulu, M.0000-0001-8172-7081
Additional Information:© 2016 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Received 12 October 2015, Revised 10 January 2016, Accepted 12 January 2016, Available online 14 January 2016. Editor: M. Doser. Funded by SCOAP3. We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centres and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construc-tion and operation of the LHC and the CMS detector provided by the following funding agencies: BMWFW and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MOST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); MoER, ERC IUT and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); LAS (Lithuania); MOE and UM (Malaysia); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS and RFBR (Russia); MESTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie pro-gramme and the European Research Council and EPLANET (European Union); the Leventis Foundation; the Alfred P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture(FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Council of Science and Industrial Re-search, India; the HOMING PLUS programme of the Foundation for Polish Science, cofinanced from European Union, Regional Development Fund; the OPUS programme of the National Science Centre(Poland); the Compagnia di San Paolo (Torino); the Con-sorzio per la Fisica (Trieste); MIUR project 20108T4XTM (Italy); the Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF; the National Priorities Research Program by Qatar National Research Fund; the Rachadapisek Sompot Fund for Post-doctoral Fellowship, Chulalongkorn University (Thailand); and the Welch Foundation, contract C-1845.
Group:CMS@Caltech
Funders:
Funding AgencyGrant Number
Bundesministerium für Wissenschaft, Forschung und Wirtschaft (BMWFW)UNSPECIFIED
Fonds de la Recherche Scientifique (FNRS)UNSPECIFIED
Fonds Wetenschappelijk Onderzoek - Vlaanderen (FWO)UNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)UNSPECIFIED
Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)UNSPECIFIED
Fundação de Amparo à Pesquisa do Estado de Sao Paulo (FAPESP)UNSPECIFIED
Bulgarian Ministry of Education and Science (MES)UNSPECIFIED
CERNUNSPECIFIED
Chinese Academy of SciencesUNSPECIFIED
Ministry of Science and Technology (China)UNSPECIFIED
National Natural Science Foundation of ChinaUNSPECIFIED
COLCIENCIAS (Colombia)UNSPECIFIED
Croatian Ministry of Science, Education and SportUNSPECIFIED
Croatian Science FoundationUNSPECIFIED
Research Promotion Foundation, CyprusUNSPECIFIED
Ministry of Education and Research, Estonian Research Council, via IUTUNSPECIFIED
European Regional Development Fund, EstoniaUNSPECIFIED
Academy of FinlandUNSPECIFIED
Ministry of Education and Culture (Finland)UNSPECIFIED
Helsinki Institute of Physics UNSPECIFIED
Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA) FranceUNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)UNSPECIFIED
Bundesministerium für Bildung und Forschung (BMBF)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)UNSPECIFIED
General Secretariat for Research and Technology (GSRT)UNSPECIFIED
National Scientific Research Foundation (Hungary)UNSPECIFIED
Department of Atomic Energy (India)UNSPECIFIED
Institute for Studies in Theoretical Physics and Mathematics, IranUNSPECIFIED
Science Foundation, IrelandUNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Ministry of Science, ICT and Future Planning (Korea)UNSPECIFIED
National Research Foundation of KoreaUNSPECIFIED
Lithuanian Academy of Sciences UNSPECIFIED
Ministry of Education (Malaysia)UNSPECIFIED
CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico)UNSPECIFIED
Ministry of Business, Innovation and Employment, New ZealandUNSPECIFIED
Pakistan Atomic Energy CommissionUNSPECIFIED
Ministry of Science and Higher Education (Poland)UNSPECIFIED
Fundação para a Ciência e a Tecnologia (FCT)UNSPECIFIED
Joint Institute for Nuclear Research (JINR)UNSPECIFIED
Ministry of Education and Science of the Russian FederationUNSPECIFIED
Federal Agency of Atomic Energy of the Russian FederationUNSPECIFIED
Russian Academy of SciencesUNSPECIFIED
Russian Foundation for Basic ResearchUNSPECIFIED
Ministry of Education, Science and Technological Development of SerbiaUNSPECIFIED
ETH Board, ETH Zurich, PSI, SNF, UniZH, Canton Zurich, and SERUNSPECIFIED
Ministry of Science and Technology (Taipei)UNSPECIFIED
Thailand center of Excellence in PhysicsUNSPECIFIED
Institute for the Promotion of Teaching Science and Technology of ThailandUNSPECIFIED
Special Task Force for Activating Research and the National Science and Technology Development Agency of ThailandUNSPECIFIED
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu (TÜBİTAK)UNSPECIFIED
National Academy of Sciences of Ukraine and State Fund for Fundamental Researches, UkraineUNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Marie-Curie programUNSPECIFIED
European Research Council (ERC)UNSPECIFIED
EPLANETUNSPECIFIED
Leventis Foundation UNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Belgian Federal Science Policy OfficeUNSPECIFIED
Fonds pour la Formation à la Recherche dans l’índustrie et dans l’Ágriculture (FRIA-Belgium)UNSPECIFIED
Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)UNSPECIFIED
Ministry of Education, Youth and Sports (MEYS) of Czech RepublicUNSPECIFIED
Council of Science and Industrial Research, IndiaUNSPECIFIED
HOMING PLUS programme of Foundation for Polish ScienceUNSPECIFIED
European Union Regional Development FundUNSPECIFIED
OPUS programme of the National Science Center (Poland)UNSPECIFIED
Compagnia di San Paolo (Torino)UNSPECIFIED
Consorzio per la Fisica (Trieste)UNSPECIFIED
Ministero dell'Istruzione, dell'Università e della Ricerca (MUIR)UNSPECIFIED
Thalis programmeUNSPECIFIED
Aristeia programmeUNSPECIFIED
EU-ESFUNSPECIFIED
Greek National Strategic Reference Framework (NSRF)UNSPECIFIED
Qatar National Research Fund National Priorities Research ProgramUNSPECIFIED
Rachadapisek Sompot Fund for Postdoctoral Fellowship Chulalongkorn University (Thailand)UNSPECIFIED
Welch FoundationC-1845
Türkiye Atom Enerjisi Kurumu (TAEK)UNSPECIFIED
National Innovation Office (Hungary)UNSPECIFIED
SCOAP3UNSPECIFIED
Subject Keywords:CMS; Physics; Heavy ions; b-tagging
Record Number:CaltechAUTHORS:20160401-080656780
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160401-080656780
Official Citation:Transverse momentum spectra of inclusive b jets in pPb collisions at, Physics Letters B, Volume 754, 10 March 2016, Pages 59-80, ISSN 0370-2693, http://dx.doi.org/10.1016/j.physletb.2016.01.010. (http://www.sciencedirect.com/science/article/pii/S0370269316000149)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65835
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:04 Apr 2016 17:19
Last Modified:04 Apr 2016 17:19

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