CMS-PAS-HIN-14-009

CMS-PAS-HIN-14-009
$\mathrm{J}/\psi$ production in pPb collisions
CMS Collaboration
August 2015

Abstract: This document reports on the measurement of the prompt and non-prompt $\mathrm{J}/\psi$ in proton-lead collisions at a center-of-mass energy per nucleon pair of 5.02 TeV with an integrated luminosity of 34.6 nb $^{-1}$ recorded by the CMS experiment at the LHC in 2013. Prompt $\mathrm{J}/\psi$ and non-prompt $\mathrm{J}/\psi$ from b-hadron decays are measured and investigated separately, via their $\mu^{+} \mu^{-}$ decay mode. The differential production cross section is presented in the range 2 $< p_{\mathrm T} <$ 30 GeV/ $c$ and rapidity -2.87 $< y_{CM} <$ 1.93 in the proton-nucleon center-of-mass frame. The ratio of the forward and backward production yields is measured in bins of $p_{\mathrm T}$ , rapidity and a variable describing the event activity. The prompt and non-prompt $\mathrm{J}/\psi$ yields at forward rapidities are smaller than those at backward rapidities, with a dependence on the event activity. These results point to the presence of cold nuclear matter effects expected for pPb collisions.
Links: CDS record (PDF) ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; These preliminary results are superseded in this paper, EPJC 77 (2017) 269. The superseded preliminary plots can be found here.

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