Measurement of the inclusive W and Z production cross sections in pp collisions at ps = 7TeV with the CMS experiment

76 páginas, 29 figuras, 20 tablas.-- Open Access: This article is distributed under the terms of the Creative Commons\ud
Attribution Noncommercial License.-- CMS Collaboration: et al.A measurement of inclusive W and Z production cross sections in pp collisions\ud
at ps = 7TeV is presented. The electron and muon decay channels are analyzed in a data\ud
sample collected with the CMS detector at the LHC and corresponding to an integrated\ud
luminosity of 36 pb-1. The measured inclusive cross sections are  (pp - WX)   B(W - lv) = 10:31   0:02 (stat:)   0:09 (syst:)   0:10 (th:)   0:41 (lumi:) nb and  (pp - ZX)  \ud
B(Z - l+l-) = 0:974   0:007 (stat:)   0:007 (syst:)   0:018 (th:)   0:039 (lumi:) nb,\ud
limited to the dilepton invariant mass range 60 to 120 GeV. The luminosity-independent\ud
cross section ratios are ( (pp - WX) * B(W - lv)) / ( (pp - ZX) *  B(Z - l+l-)) =\ud
10:54   0:07 (stat:)   0:08 (syst:)   0:16 (th:) and ( (pp - W+X)   B(W+ - l+v )) /\ud
( (pp ! W-X)   B(W- ! l-v)) = 1:421 0:006 (stat:) 0:014 (syst:) 0:029 (th:). The\ud
measured values agree with next-to-next-to-leading order QCD cross section calculations\ud
based on recent parton distribution functions.This work was supported by the Austrian Federal\ud
Ministry of Science and Research; the Belgium Fonds de la Recherche Scienti que, and\ud
Fonds voor Wetenschappelijk Onderzoek; the Brazilian Funding Agencies (CNPq, CAPES,\ud
FAPERJ, and FAPESP); the Bulgarian Ministry of Education and Science; CERN; the\ud
Chinese Academy of Sciences, Ministry of Science and Technology, and National Natural\ud
Science Foundation of China; the Colombian Funding Agency (COLCIENCIAS); the\ud
Croatian Ministry of Science, Education and Sport; the Research Promotion Foundation,\ud
Cyprus; the Estonian Academy of Sciences and NICPB; the Academy of Finland, Finnish\ud
Ministry of Education and Culture, and Helsinki Institute of Physics; the Institut National\ud
de Physique Nuclèaire et de Physique des Particules / CNRS, and Commissariat á l'Énergie\ud
Atomique et aux Énergies Alternatives / CEA, France; the Bundesministerium für Bildung\ud
und Forschung, Deutsche Forschungsgemeinschaft, and Helmholtz-Gemeinschaft Deutscher\ud
Forschungszentren, Germany; the General Secretariat for Research and Technology, Greece;\ud
the National Scienti c Research Foundation, and National Office for Research and Technology,\ud
Hungary; the Department of Atomic Energy and the Department of Science and\ud
Technology, India; the Institute for Studies in Theoretical Physics and Mathematics, Iran;\ud
the Science Foundation, Ireland; the Istituto Nazionale di Fisica Nucleare, Italy; the Korean\ud
Ministry of Education, Science and Technology and the World Class University program of VESTAV,\ud
CONACYT, SEP, and UASLP-FAI); the Ministry of Science and Innovation,\ud
New Zealand; the Pakistan Atomic Energy Commission; the State Commission for Scienti\ud
 c Research, Poland; the Fundaçào para a Ciència e a Tecnologia, Portugal; JINR (Armenia,\ud
Belarus, Georgia, Ukraine, Uzbekistan); the Ministry of Science and Technologies of\ud
the Russian Federation, the Russian Ministry of Atomic Energy and the Russian Foundation\ud
for Basic Research; the Ministry of Science and Technological Development of Serbia;\ud
the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain; the\ud
Swiss Funding Agencies (ETH Board, ETH Zurich, PSI, SNF, UniZH, Canton Zurich, and\ud
SER); the National Science Council, Taipei; the Scienti c and Technical Research Council\ud
of Turkey, and Turkish Atomic Energy Authority; the Science and Technology Facilities\ud
Council, UK; the US Department of Energy, and the US National Science Foundation.\ud
Individuals have received support from the Marie-Curie programme and the European\ud
Research Council (European Union); the Leventis Foundation; the A. P. Sloan Foundation;\ud
the Alexander von Humboldt Foundation; the Associazione per lo Sviluppo Scienti co\ud
e Tecnologico del Piemonte (Italy); the Belgian Federal Science Policy Office; the Fonds\ud
pour la Formation á la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium);\ud
the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); and the\ud
Council of Science and Industrial Research, India.Peer reviewe