dc.contributor.author CMS CollaborationAdair, A.Boulahouache, C.Cuplov, V.Ecklund, K.M.Geurts, F.J.M.Padley, B.P.Redjimi, R.Roberts, J.Zabel, J. 2015-07-14T16:10:37Z 2015-07-14T16:10:37Z 2012 CMS Collaboration, Adair, A., Boulahouache, C., et al.. "J/ψ and ψ (2S) production in pp collisions at √s=7Tev." Journal of High Energy Physics, 2012, no. 11 (2012) Springer: http://dx.doi.org/10.1007/JHEP02(2012)011. https://hdl.handle.net/1911/80973 A measurement of the J/ψ and ψ(2S) production cross sections in pp collisions at √s=7TeV with the CMS experiment at the LHC is presented. The data sample corresponds to an integrated luminosity of 37 pb−1. 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 and integrated in the kinematical regions considered in this study. 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 → ψ(2S)X decay is extracted from the ratio of the non-prompt cross sections to be: B(B→ψ(2S)X)=(3.08±0.12(stat.+syst.)±0.13(theor.)±0.42(BPDG))×10−3. eng Springer JHEP is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ J/ψ and ψ (2S) production in pp collisions at √s=7Tev Journal article Journal of High Energy Physics Hadron-Hadron Scattering 2012 11 Text http://dx.doi.org/10.1007/JHEP02(2012)011 publisher version
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