Measurement of J/psi and psi(2S) prompt double-differential cross sections in pp collisions at root s=7 TeV
Type :
Article
Publication Status :
published
Access :
restrictedAccess
Abstract
The double-differential cross sections of promptly produced J/ψ and ψ(2S) mesons are measured in pp collisions at s√=7 TeV, as a function of transverse momentum pT and absolute rapidity |y|. The analysis uses J/ψ and ψ(2S) dimuon samples collected by the CMS experiment, corresponding to integrated luminosities of 4.55 and 4.90 fb−1, 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/ψ and ψ(2S), respectively, when integrated over the interval |y|<1.2. The ratio of the ψ(2S) to J/ψ cross sections is also reported for |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.
Source :
Physical Review Letters
Date :
2015-05-15
Volume :
114
Issue :
19
Publisher :
American Physical Society
URI
http://hdl.handle.net/10679/4380http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.191802
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