# J/psi and psi(2S) production in pp collisions at sqrt(s) = 7 TeV

7 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
Abstract : A measurement of the J/psi and psi(2S) production cross sections in pp collisions at sqrt(s)=7 TeV with the CMS experiment at the LHC is presented. The data sample corresponds to an integrated luminosity of 37 inverse picobarns. Using a fit to the invariant mass and decay length distributions, production cross sections have been measured separately for prompt and non-prompt charmonium states, as a function of the meson transverse momentum in several rapidity ranges. In addition, cross sections restricted to the acceptance of the CMS detector are given, which are not affected by the polarization of the charmonium states. The ratio of the differential production cross sections of the two states, where systematic uncertainties largely cancel, is also determined. The branching fraction of the inclusive B to psi(2S) X decay is extracted from the ratio of the non-prompt cross sections to be: BR(B to psi(2S) X) = (3.08 +/- 0.12(stat.+syst.) +/- 0.13(theor.) +/- 0.42(BR[PDG])) 10^-3
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00639029
Contributor : Sylvie Flores <>
Submitted on : Tuesday, November 8, 2011 - 7:22:42 AM
Last modification on : Wednesday, January 6, 2021 - 6:44:02 PM

### Citation

S. Chatrchyan, D. Sillou, M. Besancon, S. Choudhury, M. Dejardin, et al.. J/psi and psi(2S) production in pp collisions at sqrt(s) = 7 TeV. Journal of High Energy Physics, Springer, 2012, 02, pp.011. ⟨10.1007/JHEP02(2012)011⟩. ⟨in2p3-00639029⟩

Record views