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Updated measurements of exclusive J/ψ and ψ(2S) production cross-sections in pp collisions at $\sqrt{s}=7$ TeV
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LHCb Collaboration (Including: Back, J. J., Blake, Thomas, Craik, Daniel, Dossett, D., Gershon, T. J., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Wallace, Charlotte, Whitehead, M. (Mark) and Williams, M. P.). (2014) Updated measurements of exclusive J/ψ and ψ(2S) production cross-sections in pp collisions at $\sqrt{s}=7$ TeV. Journal of Physics G-Nuclear and Particle Physics, Volume 41 (Issue 5). Article number 055002 . doi:10.1088/0954-3899/41/5/055002 ISSN 0954-3899.
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WRAP_0954-3899_41_5_055002.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution. Download (960Kb) | Preview |
Official URL: http://dx.doi.org/10.1088/0954-3899/41/5/055002
Abstract
The differential cross-section as a function of rapidity has been measured for the exclusive production of J/ψ and ψ(2S) mesons in proton–proton collisions at $\sqrt{s}=7$ 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 be
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.
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