Khachatryan, V. ; Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Bergauer, T. ; Dragicevic, M. ; Erö, J. ; Fabjan, C. ; Friedl, M. ; Mondal, N. K. ; et., al (2011) Prompt and non-prompt J/ψ production in pp collisions at √s = 7 TeV European Physical Journal C (EPJ C), The - Particles and Fields, 71 (3). p. 1575. ISSN 1434-6044
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Official URL: http://www.springerlink.com/content/v287172w5w5070...
Related URL: http://dx.doi.org/10.1140/epjc/s10052-011-1575-8
Abstract
The production of J/ψ mesons is studied in pp collisions at √s =7s 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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Springer. |
| ID Code: | 66921 |
| Deposited On: | 28 Oct 2011 03:57 |
| Last Modified: | 28 Oct 2011 03:57 |
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