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Title

Prompt and non-prompt J/ψ production in pp collisions at √s =7 TeV

AuthorsKhachatryan, V.; Brochero Cifuentes, J. A. ; Cabrillo, I. J. ; Cabrillo, I. J. ; Calderon, Alicia ; Chamizo Llatas, M.; Chuang, S. H. ; Duarte Campderros, J. ; Felcini, Marta ; Fernández, M. ; Gómez, G. ; González Sánchez, J. ; González Suárez, R. ; Jorda, C. ; Lobelle Pardo, P. ; López Virto, A. ; Marco, Rafael ; Marco, Jesús ; Martínez-Rivero, Celso ; Matorras, Francisco ; Piedra, Jonatan ; Rodrigo, Teresa ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Sobron Sañudo, M. ; Vila, Iván ; Vilar, Rocío
Issue Date2011
PublisherSpringer
CitationEuropean Physical Journal C 71(3): 1575 (2011)
AbstractThe production of J/ψ mesons is studied in pp collisions at √s = 7 TeV with the CMS experiment at the LHC. The measurement is based on a dimuon sample corresponding to an integrated luminosity of 314 nb−1. The J/ψ differential cross section is determined, as a function of the J/ψ transverse momentum, in three rapidity ranges. A fit to the decay length distribution is used to separate the prompt from the non-prompt (b hadron to J/ψ) component. Integrated over J/ψ transverse momentum from 6.5 to 30 GeV/c and over rapidity in the range |y| < 2.4, the measured cross sections, times the dimuon decay branching fraction, are 70.9 ± 2.1(stat.) ± 3.0(syst.) ± 7.8(luminosity) nb for prompt J/ψ mesons assuming unpolarized production and 26.0 ± 1.4(stat.) ± 1.6(syst.) ± 2.9(luminosity) nb for J/ψ mesons from b-hadron decays.
Description26 páginas, 7 figuras, 7 tablas.-- CMS collaboration: et al.-- Open Access: This article is distributed under the terms of the Creative Commons Attribution Noncommercial License
Publisher version (URL)http://dx.doi.org/10.1140/epjc/s10052-011-1575-8
URIhttp://hdl.handle.net/10261/52046
DOIhttp://dx.doi.org/10.1140/epjc/s10052-011-1575-8
ISSN1434-6044
E-ISSN1434-6052
Appears in Collections:(IFCA) Artículos
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