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Measurement of the relative prompt production rate of χ_(c2) and χ_(c1) in pp collisions at √s =7 TeV

Chatrchyan, S. and Apresyan, A. and Bornheim, A. and Chen, Y. and Di Marco, E. and Duarte, J. and Gataullin, M. and Ma, Y. and Mott, A. and Newman, H. B. and Rogan, C. and Spiropulu, M. and Timciuc, V. and Veverka, J. and Wilkinson, R. and Xie, S. and Yang, Y. and Zhu, R. Y. and Dias, F. A. and Dubinin, M. (2012) Measurement of the relative prompt production rate of χ_(c2) and χ_(c1) in pp collisions at √s =7 TeV. European Physical Journal C, 72 (12). Art. No. 2251. ISSN 1434-6044. http://resolver.caltech.edu/CaltechAUTHORS:20130326-142449532

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Abstract

A measurement is presented of the relative prompt production rate of χ c2 and χ c1 with 4.6 fb^(−1) of data collected by the CMS experiment at the LHC in pp collisions at s√=7 TeV . The two states are measured via their radiative decays χ_c→J/ψ+γ, with the photon converting into an e^+e^− pair for J/ψ rapidity |y(J/ψ)|<1.0 and photon transverse momentum p_T(γ)>0.5 GeV/c. The measurement is given for six intervals of p_T(J/ψ) between 7 and 25 GeV/c. The results are compared to theoretical predictions.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1140/epjc/s10052-012-2251-3DOIUNSPECIFIED
http://link.springer.com/article/10.1140/epjc/s10052-012-2251-3PublisherUNSPECIFIED
Additional Information:© 2012 CERN for the benefit of the CMS collaboration. Received: 2 October 2012. Revised: 17 November 2012. Published online: 14 December 2012. 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. The authors would like to thank Sergey Baranov for providing theoretical calculations in the kT-factorization scheme and Kuang-Ta Chao and Yan-Qing Ma for their NRQCD predictions. 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 Estonian Academy of Sciences and NICPB; 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 Onderzoek 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
Estonian Academy of Sciences and NICPB UNSPECIFIED
Academy of FinlandUNSPECIFIED
Finnish Ministry of Education and Culture, and Helsinki Institute of PhysicsUNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules / CNRS, and Commissariat à l’Énergie Atomique et aux Énergies Alternatives / CEA, FranceUNSPECIFIED
Bundesministerium für Bildung und Forschung (GErmany)UNSPECIFIED
Deutsche Forschungsgemeinschaft (Germany)UNSPECIFIED
Helmholtz- Gemeinschaft Deutscher Forschungszentren, GermanyUNSPECIFIED
General Secretariat for Research and Technology, GreeceUNSPECIFIED
National Scientific Research Foundation, and National Office for Research and Technology, HungaryUNSPECIFIED
Department of Atomic Energy and the Department of Science and Technology, IndiaUNSPECIFIED
Institute for Studies in Theoretical Physics and Mathematics, IranUNSPECIFIED
Science Foundation, IrelandUNSPECIFIED
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 (Mexico)UNSPECIFIED
UASLP-FAI (Mexico)UNSPECIFIED
Ministry of Science and Innovation, New ZealandUNSPECIFIED
Pakistan Atomic Energy CommissionUNSPECIFIED
Ministry of Science and Higher Education and the National Science Centre, PolandUNSPECIFIED
Fundação para a Ciência e a Tecnologia, PortugalUNSPECIFIED
JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan)UNSPECIFIED
Ministry of Education and Science of the Russian Federation UNSPECIFIED
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 Serbia UNSPECIFIED
Ministerio de Ciencia e Innovacion, and Programa Consolider-Ingenio 2010, Spain UNSPECIFIED
Swiss Funding Agencies (Switzerland)UNSPECIFIED
ETH Board UNSPECIFIED
ETH Zurich UNSPECIFIED
PSIUNSPECIFIED
SNFUNSPECIFIED
UniZH UNSPECIFIED
Canton Zurich and SERUNSPECIFIED
National Science Council, TaipeiUNSPECIFIED
Scientific and Technical Research Council of TurkeyUNSPECIFIED
Turkish Atomic Energy Authority UNSPECIFIED
Science and Technology Facilities Council (UK)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Marie-Curie programme and the European Research Council (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:20130326-142449532
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130326-142449532
Official Citation:Measurement of the relative prompt production rate of χ c2 and χ c1 in pp collisions at s√=7 TeV S. Chatrchyan, V. Khachatryan, A. M. Sirunyan…
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37633
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:26 Mar 2013 22:46
Last Modified:26 Mar 2013 22:46

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