# Measurement of J/psi and psi(2S) prompt double-differential cross sections in pp collisions at sqrt(s) = 7 TeV

Abstract : The double-differential cross sections of promptly produced J/psi and psi(2S) mesons are measured in pp collisions at sqrt(s) = 7 TeV, as a function of transverse momentum pt and absolute rapidity abs(y). The analysis uses J/psi and psi(2S) dimuon samples collected by CMS, corresponding to integrated luminosities of 4.55 and 4.90 inverse femtobarns, respectively. The results are based on a two-dimensional analysis of the dimuon invariant mass and decay length, and extend to pt=120 and 100 GeV for the J/psi and psi(2S), respectively, when integrated over the interval abs(y)<1.2. The ratio of the psi(2S) to J/psi cross sections is also reported for abs(y)<1.2, over the range 10 < pt < 100 GeV. These are the highest-pt values for which the cross sections and ratio have been measured.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-01141648
Contributor : Sylvie Flores <>
Submitted on : Monday, April 13, 2015 - 2:31:23 PM
Last modification on : Friday, June 5, 2020 - 10:52:08 AM

### Citation

V. Khachatryan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Measurement of J/psi and psi(2S) prompt double-differential cross sections in pp collisions at sqrt(s) = 7 TeV. Physical Review Letters, American Physical Society, 2015, 114, pp.191802. ⟨10.1103/PhysRevLett.114.191802⟩. ⟨in2p3-01141648⟩

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