Abstract
The differential cross-section as a function of rapidity has been measured for the exclusive production of J/psi and psi(2S) mesons in proton-proton collisions at root s = 7 TeV, using data collected by the LHCb experiment, corresponding to an integrated luminosity of 930 pb(-1). The cross-sections times branching fractions to two muons having pseudorapidities between 2.0 and 4.5 are measured to besigma (pp -> J/psi -> mu+mu-)(2.0 < eta(mu +/-) < 4.5) = 291 +/- 7 +/- 19 pb, sigma (pp ->psi(2S)->mu+mu-)(2.0 < eta(mu +/-) < 4.5) = 6.5 +/- 0.9 +/- 0.4 pb,where the first uncertainty is statistical and the second is systematic. The measurements agree with next-to-leading order QCD predictions as well as with models that include saturation effects.
Original language | English |
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Article number | 055002 |
Number of pages | 20 |
Journal | Journal of Physics G-Nuclear and Particle Physics |
Volume | 41 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1 May 2014 |
Externally published | Yes |
Keywords
- inclusive production with identified hadrons
- quarkonia
- QCD
- diffraction
- central exclusive production
- DIFFRACTIVE PHOTOPRODUCTION
- MESONS