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

AuthorsBrochero Cifuentes, J. A. ; Cabrillo, I. J. ; Calderon, Alicia ; Chuang, S. H. ; Duarte Campderros, J. ; Felcini, Marta ; Fernández, M. ; Gómez, G. ; González Sánchez, J. ; Jorda, C. ; Lobelle Pardo, P. ; López Virto, A. ; Marco, Jesús ; Marco, Rafael ; Martínez-Rivero, Celso ; Matorras, Francisco ; Muñoz Sánchez, F. J. ; Piedra, Jonatan ; Rodrigo, Teresa ; Rodríguez Marrero, Ana Y. ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Sobron Sañudo, M. ; Vila, Iván ; Vilar, Rocío
KeywordsHadron-Hadron Scattering
Issue DateOct-2011
CitationJournal of High Energy Physics (10): 132 (2011)
AbstractA measurement of inclusive W and Z production cross sections in pp collisions at ps = 7TeV is presented. The electron and muon decay channels are analyzed in a data sample collected with the CMS detector at the LHC and corresponding to an integrated 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) B(Z - l+l-) = 0:974 0:007 (stat:) 0:007 (syst:) 0:018 (th:) 0:039 (lumi:) nb, limited to the dilepton invariant mass range 60 to 120 GeV. The luminosity-independent cross section ratios are ( (pp - WX) * B(W - lv)) / ( (pp - ZX) * B(Z - l+l-)) = 10:54 0:07 (stat:) 0:08 (syst:) 0:16 (th:) and ( (pp - W+X) B(W+ - l+v )) / ( (pp ! W-X) B(W- ! l-v)) = 1:421 0:006 (stat:) 0:014 (syst:) 0:029 (th:). The measured values agree with next-to-next-to-leading order QCD cross section calculations based on recent parton distribution functions.
Description76 páginas, 29 figuras, 20 tablas.-- Open Access: This article is distributed under the terms of the Creative Commons Attribution Noncommercial License.-- CMS Collaboration: et al.
Publisher version (URL)http://dx.doi.org/10.1007/JHEP10(2011)132
Appears in Collections:(IFCA) Artículos
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