Measurement of quarkonium production cross sections in pp collisions at $\sqrt{s}=$ 13 TeV

Abstract

Differential production cross sections of J/$\psi$ and $\psi$(2S) charmonium and ${\rm Y}$(nS) (n = 1, 2, 3) bottomonium states are measured in proton-proton collisions at $\sqrt{s}=$ 13 TeV, with data collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 2.3 fb${}^{-1}$ for the J/$\psi$ and 2.7 fb${}^{-1}$ for the other mesons. The five quarkonium states are reconstructed in the dimuon decay channel, for dimuon rapidity $|y|<$ 1.2. The double-differential cross sections for each state are measured as a function of $y$ and transverse momentum, and compared to theoretical expectations. In addition, ratios are presented of cross sections for prompt $\psi$(2S) to J/$\psi$, ${\rm Y}$(2S) to ${\rm Y}$(1S), and ${\rm Y}$(3S) to ${\rm Y}$(1S) production.

Replaced with the published version. Added the journal reference. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/BPH-15-005/ (CMS Public Pages)

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