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Measurement of the muon charge asymmetry in inclusive pp → W + X production at √s = 7  TeV and an improved determination of light parton distribution functions

Chatrchyan, S. and Apresyan, A. and Bornheim, A. and Bunn, J. and Chen, Y. and Di Marco, E. and Duarte, J. and Kcira, D. and Mott, A. and Newman, H. B. and Pena, C. and Rogan, C. and Spiropulu, M. and Timciuc, V. and Wilkinson, R. and Xie, S. and Zhu, R. Y. and Dias, F. A. and Dubinin, M. (2014) Measurement of the muon charge asymmetry in inclusive pp → W + X production at √s = 7  TeV and an improved determination of light parton distribution functions. Physical Review D, 90 (3). Art. No. 032004 . ISSN 1550-7998 . http://resolver.caltech.edu/CaltechAUTHORS:20141015-125323846

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Abstract

Measurements of the muon charge asymmetry in inclusive pp→W+X production at √s =7 TeV are presented. The data sample corresponds to an integrated luminosity of 4.7 fb^(−1) recorded with the CMS detector at the LHC. With a sample of more than 20 million W→μν events, the statistical precision is greatly improved in comparison to previous measurements. These new results provide additional constraints on the parton distribution functions of the proton in the range of the Bjorken scaling variable x from 10^(−3) to 10^(−1). These measurements and the recent CMS measurement of associated W+ charm production are used together with the cross sections for inclusive deep inelastic e ± p scattering at HERA in a next-to-leading-order QCD analysis. The determination of the valence quark distributions is improved, and the strange-quark distribution is probed directly through the leading-order process g+s→W+c in proton-proton collisions at the LHC.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.90.032004 DOIArticle
http://journals.aps.org/prd/abstract/10.1103/PhysRevD.90.032004PublisherArticle
http://arxiv.org/abs/1312.6283arXivDiscussion Paper
http://journals.aps.org/prd/abstract/10.1103/PhysRevD.90.032004#supplementalPublisherSupporting Information
Alternate Title:Measurement of the muon charge asymmetry in inclusive pp -> W plus X production at root s=7 TeV and an improved determination of light parton distribution functions
Additional Information:© 2014 CERN, for the CMS Collaboration. Received 21 December 2013; Published 13 August 2014. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published articles title, journal citation, and DOI. 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: the Austrian Federal Ministry of Science and Research and the Austrian Science Fund; the Belgian 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, and the Croatian Science Foundation; 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 Innovation Office, 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, Republic of Korea; the Lithuanian Academy of Sciences; the Mexican Funding Agencies (CINVESTAV, CONACYT, SEP, and UASLPFAI); theMinistry of Business, Innovation and Employment, 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, Dubna; 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 Education, Science and Technological Development of Serbia; the Secretaría de Estado de Investigación, Desarrollo 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 Thailand Center of Excellence in Physics, the Institute for the Promotion of Teaching Science and Technology of Thailand, Special Task Force for Activating Research and the National Science and Technology Development Agency of Thailand; the Scientific and Technical Research Council of Turkey, and Turkish Atomic Energy Authority; the Science and Technology Facilities Council, UK; the U.S. Department of Energy, and the U.S. National Science Foundation. Individuals have received support from the Marie-Curie programme and the European Research Council and EPLANET (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 (IWTBelgium); the Ministry of Education, Youth and Sports (MEYS) of Czech Republic; the Council of Science and Industrial Research, India; the Compagnia di San Paolo (Torino); the HOMING PLUS programme of Foundation for Polish Science, cofinanced by EU, Regional Development Fund; and the Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF.
Group:CMS@Caltech
Funders:
Funding AgencyGrant Number
Austrian Federal Ministry of Science and Research and the Austrian Science FundUNSPECIFIED
Belgian Fonds de la Recherche Scientifique and Fonds voor Wetenschappelijk OrderzoekUNSPECIFIED
CNPq, CAPES, FAPERJ, and 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
Colombian Funding Agency (COLCIENCIAS) UNSPECIFIED
Croatian Ministry of Science, Education and Sport UNSPECIFIED
Croatian Science FoundationUNSPECIFIED
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, and Helsinki Institute of PhysicsUNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules/CNRSUNSPECIFIED
Commissariat à l’Energie Atomique et aux Énergies Alternatives/CEA, FranceUNSPECIFIED
Bundesministerium für Bildung und ForschungUNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Helmholtz-Gemeinschaft Deutscher Forschungszentren (Germany)UNSPECIFIED
General Secretariat for Research and Technology, Greece UNSPECIFIED
National Scientific Research Foundation and National Innovation Office, HungaryUNSPECIFIED
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 (Italy)UNSPECIFIED
Korean Ministry of Education, Science and Technology and the World Class University program of NRF, Republic of KoreaUNSPECIFIED
Lithuanian Academy of Sciences UNSPECIFIED
CINVESTAV, CONACYT, SEP, and UASLPFAI (Mexico)UNSPECIFIED
Ministry of Business, Innovation and Employment, 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 (FCT)UNSPECIFIED
JINR (Dubna)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 Education, Science and Technological Development of SerbiaUNSPECIFIED
Secretaría de Estado de Investigación, Desarrollo e Innovación and Programa Consolider-Ingenio 2010, SpainUNSPECIFIED
Swiss Funding Agencies (Switzerland)UNSPECIFIED
ETH Board, ETH Zurich, PSI, SNF, UniZH, Canton Zurich, and SERUNSPECIFIED
National Science Council, TaipeiUNSPECIFIED
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
Scientific and Technical Research Council of TurkeyUNSPECIFIED
Turkish Atomic Energy Authority UNSPECIFIED
Science and Technology Facilities Council (STFC) (UK)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Marie Curie EIF (European Union)UNSPECIFIED
European Research Council (European Union)UNSPECIFIED
EPLANET (European Union)UNSPECIFIED
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
Compagnia di San Paolo (Torino)UNSPECIFIED
HOMING PLUS programme of Foundation for Polish Science UNSPECIFIED
European UnionUNSPECIFIED
Regional Development FundUNSPECIFIED
Thalis and Aristeia programmes cofinanced by EU-ESFUNSPECIFIED
Greek NSRFUNSPECIFIED
Classification Code:PACS: 13.38.-b; 13.85.Qk; 12.38.-t.
Record Number:CaltechAUTHORS:20141015-125323846
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141015-125323846
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50411
Collection:CaltechAUTHORS
Deposited By: Joanne McCole
Deposited On:16 Oct 2014 22:32
Last Modified:18 Dec 2014 19:37

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