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Study of high-pT charged particle suppression in PbPb compared to pp collisions at √sNN = 2.76 TeV

Chatrchyan, S. and Apresyan, A. and Bornheim, A. and Bunn, J. and Chen, Y. and Gataullin, M. and Ma, Y. and Mott, A. and Newman, H. B. and Rogan, C. and Shin, K. and Timciuc, V. and Traczyk, P. and Veverka, J. and Wilkinson, R. and Yang, Y. and Zhu, R. Y. and Spiropulu, M. and Di Marco, E. and Duarte, J. (2012) Study of high-pT charged particle suppression in PbPb compared to pp collisions at √sNN = 2.76 TeV. European Physical Journal C, 72 (3). Art. No. 1945. ISSN 1434-6044. http://resolver.caltech.edu/CaltechAUTHORS:20120508-094922484

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Abstract

The transverse momentum spectra of charged particles have been measured in pp and PbPb collisions at √sNN=276 TeV by the CMS experiment at the LHC. In the transverse momentum range p_T = 5–10 GeV/c, the charged particle yield in the most central PbPb collisions is suppressed by up to a factor of 7 compared to the pp yield scaled by the number of incoherent nucleon–nucleon collisions. At higher p_T, this suppression is significantly reduced, approaching roughly a factor of 2 for particles with p_T in the range p_T=40–100 GeV/c.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1140/epjc/s10052-012-1945-xDOIUNSPECIFIED
http://www.springerlink.com/content/4k61nv67v97j1547/PublisherUNSPECIFIED
Additional Information:© 2012 CERN for the benefit of the CMS collaboration. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. Received: 12 February 2012. Revised: 26 February 2012. Published online: 29 March 2012. We wish to congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staff at CERN and other CMS institutes. This work was supported by the Austrian Federal Ministry of Science and Research; the Belgium Fonds de la Recherche Scientifique, and Fonds voor Wetenschappelijk Onderzoek; the Brazilian Funding Agencies (CNPq, CAPES, FAPERJ, and FAPESP); the Bulgarian Ministry of Education and Science; CERN; the Chinese Academy of Sciences, Ministry of Science and Technology, and National Natural Science Foundation of China; the Colombian Funding Agency (COLCIENCIAS); the Croatian Ministry of Science, Education and Sport; the Research Promotion Foundation, Cyprus; the Ministry of Education and Research, Recurrent financing contract SF0690030s09 and European Regional Development Fund, Estonia; the Academy of Finland, Finnish Ministry of Education and Culture, and Helsinki Institute of Physics; the Institut National de Physique Nucléaire et de Physique des Particules/CNRS, and Commissariat à l’Énergie Atomique et aux Énergies Alternatives/CEA, France; the Bundesministerium für Bildung und Forschung, Deutsche Forschungsgemeinschaft, and Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany; the General Secretariat for Research and Technology, Greece; the National Scientific Research Foundation, and National Office for Research and Technology, Hungary; the Department of Atomic Energy and the Department of Science and Technology, India; the Institute for Studies in Theoretical Physics and Mathematics, Iran; the Science Foundation, Ireland; the Istituto Nazionale di Fisica Nucleare, Italy; the Korean Ministry of Education, Science and Technology and the World Class University program of NRF, Korea; the Lithuanian Academy of Sciences; the Mexican Funding Agencies (CINVESTAV, CONACYT, SEP, and UASLP-FAI); the Ministry of Science and Innovation, New Zealand; the Pakistan Atomic Energy Commission; the Ministry of Science and Higher Education and the National Science Centre, Poland; the Fundação para a Ciência e a Tecnologia, Portugal; JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); the Ministry of Education and Science of the Russian Federation, the Federal Agency of Atomic Energy of the Russian Federation, Russian Academy of Sciences, and the Russian Foundation for Basic Research; the Ministry of Science and Technological Development of Serbia; the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain; the Swiss Funding Agencies (ETH Board, ETH Zurich, PSI, SNF, UniZH, Canton Zurich, and SER); the National Science Council, Taipei; the Scientific and Technical Research Council of Turkey, and Turkish Atomic Energy Authority; the Science and Technology Facilities Council, UK; the US Department of Energy, and the US National Science Foundation. Individuals have received support from the Marie-Curie programme and the European Research Council (European Union); the Leventis Foundation; the A. 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 Council of Science and Industrial Research, India; and the HOMING PLUS programme of Foundation for Polish Science, cofinanced from European Union, Regional Development Fund.
Group:CMS@Caltech
Funders:
Funding AgencyGrant Number
Austrian Federal Ministry of Science and ResearchUNSPECIFIED
Belgium Fonds de la Recherche Scientifique, and Fonds voor Wetenschappelijk Onder-zoek UNSPECIFIED
CNPq (Brazil)UNSPECIFIED
CAPES (Brazil)UNSPECIFIED
FAPERJ (Brazil)UNSPECIFIED
FAPESP (Brazil)UNSPECIFIED
Bulgarian Ministry of Education and ScienceUNSPECIFIED
CERNUNSPECIFIED
Chinese Academy of SciencesUNSPECIFIED
Ministry of Science and Technology UNSPECIFIED
National Natural Science Foundation of ChinaUNSPECIFIED
COLCIENCIAS (Colombia)UNSPECIFIED
Croatian Ministry of Science, Education and Sport UNSPECIFIED
Research Promotion Foundation, Cyprus UNSPECIFIED
Ministry of Education and Research SF0690030s09
European Regional Development Fund, EstoniaUNSPECIFIED
Academy of FinlandUNSPECIFIED
Finnish Ministry of Education and Culture UNSPECIFIED
Helsinki Institute of Physics UNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules/CNRSUNSPECIFIED
Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA) France UNSPECIFIED
Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany)UNSPECIFIED
Helmholtz-Gemeinschaft Deutscher Forschungszentren, GermanyUNSPECIFIED
General Secretariat for Research and Technology, Greece UNSPECIFIED
National Scientific Research Foundation, and National Office for Research and Technology (Hungary) UNSPECIFIED
Department of Atomic Energy and Department of Science and Technology of IndiaUNSPECIFIED
Institute for Studies in Theoretical Physics and Mathematics (Iran)UNSPECIFIED
Science Foundation, Ireland UNSPECIFIED
Istituto Nazionale di Fisica Nucleare, ItalyUNSPECIFIED
Korean Ministry of Education, Science and Technology and the World Class University Program of NRF (KOREA)UNSPECIFIED
Lithuanian Academy of Sciences UNSPECIFIED
CINVESTAV (Mexico)UNSPECIFIED
CONACyT (Mexico)UNSPECIFIED
SEP and UASLP-FAI (Mexico)UNSPECIFIED
Ministry of Science and Innovation, New ZealandUNSPECIFIED
Pakistan Atomic Energy CommissionUNSPECIFIED
Ministry of Science and Higher Education (Poland)UNSPECIFIED
National Science Centre, PolandUNSPECIFIED
Fundação para a Ciência e a Tecnologia (Portugal)UNSPECIFIED
JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan)UNSPECIFIED
Ministry of Education and Science of the Russian FederationUNSPECIFIED
Federal Agency of Atomic Energy of the Russian Federation UNSPECIFIED
Russian Academy of SciencesUNSPECIFIED
Russian Foundation for Basic ResearchUNSPECIFIED
Ministry of Science and Technological Development of SerbiaUNSPECIFIED
Ministerio de Ciencia e Innovacion, and Programa Consolider-Ingenio 2010, Spain UNSPECIFIED
ETH Board UNSPECIFIED
ETH Zurich UNSPECIFIED
PSIUNSPECIFIED
SNFUNSPECIFIED
UniZH UNSPECIFIED
Canton Zurich and SERUNSPECIFIED
National Science Council (Taipei)UNSPECIFIED
Scientific and Technical Research Council of TurkeyUNSPECIFIED
Turkish Atomic Energy Authority UNSPECIFIED
Science and Technology Facilities Council (United Kingdom)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Marie Curie EIF (European Union)UNSPECIFIED
Leventis Foundation UNSPECIFIED
A.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
Council of Science and Industrial Research, IndiaUNSPECIFIED
HOMING PLUS programme of Foundation for Polish Science UNSPECIFIED
European UnionUNSPECIFIED
Regional Development FundUNSPECIFIED
Record Number:CaltechAUTHORS:20120508-094922484
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120508-094922484
Official Citation:Study of high-pT charged particle suppression in PbPb compared to pp collisions at sNN=276 TeV ...momentum spectra of charged particles have been...T , this suppression is significantly... The CMS Collaboration, S. Chatrchyan, V. Khachatryan, A. M. Sirunyan and A. Tumasyan, et al. 2012, Volume 72, Number 3, 1945
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31343
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:08 May 2012 18:23
Last Modified:25 Feb 2013 23:30

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