Jet Shapes of Isolated Photon-Tagged Jets in Pb-Pb and pp Collisions at sNN =5.02 TeV

(CMS Collaboration)

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Abstract

The modification of jet shapes in Pb-Pb collisions, relative to those in pp collisions, is studied for jets associated with an isolated photon. The data were collected with the CMS detector at the LHC at a nucleon-nucleon center-of-mass energy of 5.02 TeV. Jet shapes are constructed from charged particles with track transverse momenta (pT) above 1 GeV/c in annuli around the axes of jets with pTjet>30 GeV/c associated with an isolated photon with pTγ>60 GeV/c. The jet shape distributions are consistent between peripheral Pb-Pb and pp collisions, but are modified for more central Pb-Pb collisions. In these central Pb-Pb events, a larger fraction of the jet momentum is observed at larger distances from the jet axis compared to pp, reflecting the interaction between the partonic medium created in heavy ion collisions and the traversing partons.

Original languageEnglish
Article number152001
JournalPhysical review letters
Volume122
Issue number15
DOIs
Publication statusPublished - 2019 Apr 17

Bibliographical note

Funding Information:
The modification of jet shapes in Pb-Pb collisions, relative to those in p p collisions, is studied for jets associated with an isolated photon. The data were collected with the CMS detector at the LHC at a nucleon-nucleon center-of-mass energy of 5.02 TeV. Jet shapes are constructed from charged particles with track transverse momenta ( p T ) above 1     GeV / c in annuli around the axes of jets with p T jet > 30     GeV / c associated with an isolated photon with p T γ > 60     GeV / c . The jet shape distributions are consistent between peripheral Pb-Pb and p p collisions, but are modified for more central Pb-Pb collisions. In these central Pb-Pb events, a larger fraction of the jet momentum is observed at larger distances from the jet axis compared to p p , reflecting the interaction between the partonic medium created in heavy ion collisions and the traversing partons. BMBWF (Bundesministerium für Bildung, Wissenschaft, Forschung) Austrian Science Fund 10.13039/501100002428 Fonds De La Recherche Scientifique - FNRS 10.13039/501100002661 Fonds Wetenschappelijk Onderzoek 10.13039/501100003130 Conselho Nacional de Desenvolvimento Científico e Tecnológico 10.13039/501100003593 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior 10.13039/501100002322 Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro 10.13039/501100004586 Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul 10.13039/501100004263 Fundação de Amparo à Pesquisa do Estado de São Paulo 10.13039/501100001807 Ministry of Education and Science 10.13039/501100005992 CERN 10.13039/100012470 Chinese Academy of Sciences 10.13039/501100002367 Ministry of Science and Technology of the People’s Republic of China 10.13039/501100002855 National Natural Science Foundation of China 10.13039/501100001809 Departamento Administrativo de Ciencia, Tecnología e Innovación 10.13039/100007637 Ministarstvo Znanosti, Obrazovanja i Sporta 10.13039/501100006588 Hrvatska Zaklada za Znanost 10.13039/501100004488 Research Promotion Foundation 10.13039/501100001810 Secretaría de Educación Superior, Ciencia, Tecnología e Innovación 10.13039/501100004299 Haridus- ja Teadusministeerium 10.13039/501100003510 Eesti Teadusagentuur 10.13039/501100002301 European Regional Development Fund 10.13039/501100008530 Academy of Finland 10.13039/501100002341 H2020 European Research Council 10.13039/100010663 Finnish Ministry of Education and Culture (MEC), (Finland) Helsinki Institute of Physics (Finland) Institut National de Physique Nucléaire et de Physique des Particules Centre National de la Recherche Scientifique 10.13039/501100004794 Commissariat à l’Énergie Atomique et aux Énergies Alternatives 10.13039/501100006489 Bundesministerium für Bildung und Forschung 10.13039/501100002347 Deutsche Forschungsgemeinschaft 10.13039/501100001659 Helmholtz-Gemeinschaft 10.13039/501100001656 General Secretariat for Research and Technology 10.13039/501100003448 National Research, Development and Innovation Fund (Hungary) Department of Atomic Energy, Government of India 10.13039/501100001502 Department of Science and Technology, Ministry of Science and Technology 10.13039/501100001409 Institute for Research in Fundamental Sciences 10.13039/501100006115 Science Foundation Ireland 10.13039/501100001602 Instituto Nazionale di Fisica Nucleare 10.13039/501100004007 Ministry of Education, Science and Technology 10.13039/501100004085 National Research Foundation of Korea 10.13039/501100003725 Ministry of Education and Science (MES, Latvia) Lietuvos Moksl Akademija 10.13039/501100008523 Ministry of Higher Education, Malaysia 10.13039/501100003093 Universiti Malaya 10.13039/501100004386 Benemérita Universidad Autónoma de Puebla 10.13039/501100006348 Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional 10.13039/501100008688 Consejo Nacional de Ciencia y Tecnología 10.13039/501100003141 Laboratorio Nacional de Supercómputo del Sureste (Mexico) Secretaría de Educación Pública 10.13039/100010096 Universidad Autónoma de San Luis Potosí 10.13039/501100005324 Ministry of Science (Montenegro) Ministry of Business, Innovation and Employment 10.13039/501100003524 Pakistan Atomic Energy Commission 10.13039/501100008689 Ministerstwo Nauki i Szkolnictwa Wy?szego 10.13039/501100004569 Narodowe Centrum Nauki 10.13039/501100004281 Fundação para a Ciência e a Tecnologia 10.13039/501100001871 Joint Institute for Nuclear Research 10.13039/501100003822 Ministry of Education and Science of the Russian Federation 10.13039/501100003443 State Atomic Energy Corporation ROSATOM 10.13039/501100008687 Russian Academy of Sciences 10.13039/501100002674 Russian Foundation for Basic Research 10.13039/501100002261 National Research Center “Kurchatov Institute” Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja 10.13039/501100004564 Secretaría de Estado de Investigacion, Desarrollo e Innovacion 10.13039/501100003330 Programa Consolider-Ingenio 2010 Plan de Ciencia, Tecnología e Innovación 2013-2017 del Principado de Asturias European Regional Development Fund 10.13039/501100008530 Ministry of Science, Technology, and Research (Sri Lanka) ETH Board Eidgenössische Technische Hochschule Zürich 10.13039/501100003006 Paul Scherrer Institut 10.13039/501100004219 Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung 10.13039/501100001711 UniZH Canton Zurich State Secretariat for Education and Research Swiss Funding Agencies (Switzerland) Ministry of Science and Technology, Taiwan 10.13039/501100004663 Thailand Center of Excellence in Physics 10.13039/100012863 Institute for the Promotion of Teaching Science and Technology of Thailand Special Task Force for Activating Research National Science and Technology Development Agency 10.13039/501100004192 Türkiye Bilimsel ve Teknolojik Ara?tirma Kurumu 10.13039/501100004410 Türkiye Atom Enerjisi Kurumu 10.13039/100010440 National Academy of Sciences of Ukraine 10.13039/501100004742 State Fund for Fundamental Research of Ukraine 10.13039/501100008690 Science and Technology Facilities Council 10.13039/501100000271 U.S. Department of Energy 10.13039/100000015 National Science Foundation 10.13039/100000001 Marie-Curie programme European Research Council and EPLANET (European Union) 10.13039/501100000781 Horizon 2020 Framework Programme 10.13039/100010661 A.G. Leventis Foundation 10.13039/501100004117 Alfred P. Sloan Foundation 10.13039/100000879 Alexander von Humboldt-Stiftung 10.13039/100005156 Belgian Federal Science Policy Office 10.13039/501100002749 Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture 10.13039/501100003134 Agentschap voor Innovatie door Wetenschap en Technologie 10.13039/501100003132 Fonds De La Recherche Scientifique - FNRS 10.13039/501100002661 Fonds Wetenschappelijk Onderzoek 10.13039/501100003130 Beijing Municipal Science and Technology Commission 10.13039/501100009592 Ministerstvo Školství, Mládeže a Telovýchovy 10.13039/501100001823 Magyar Tudományos Akadémia 10.13039/501100003825 New National Excellence Program Council of Scientific and Industrial Research 10.13039/501100001412 Fundacja na rzecz Nauki Polskiej 10.13039/501100001870 Narodowe Centrum Nauki 10.13039/501100004281 Qatar National Research Fund 10.13039/100008982 Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu Programa Severo Ochoa del Principado de Asturias European Social Fund 10.13039/501100004895 Chulalongkorn University 10.13039/501100002873 Welch Foundation 10.13039/100000928 Weston Havens Foundation 10.13039/100011223

Funding Information:
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 centers 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 construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); SENESCYT (Ecuador); 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); NKFIA (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR, and NRC KI (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI, and FEDER (Spain); MOSTR (Sri Lanka); 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).

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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