Updated measurements of exclusive J /ψ and ψ(2S) production cross-sections in pp collisions at √s=7 TeV

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Updated measurements of exclusive J /ψ and ψ(2S) production cross-sections in pp collisions at √s=7 TeV

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Aaij_2014_J._Phys._G _Nucl._Part._Phys._41_055002.pdf

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Date Issued

2014

Journal

Journal of Physics G: Nuclear and Particle Physics

Publisher

IOP Publishing

Citation

Aaij, R., et al. "Updated Measurements of Exclusive J/ and (2s) Production Cross-Sections in Pp Collisions at S = 7 Tev." Journal of Physics G: Nuclear and Particle Physics 41 5 (2014): 055002 (20 pp.).

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Final published version

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 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 σpp→J/ψ→μ+ μ? (2.0 < ημ± < 4.5) = 291 ± 7 ± 19 pb, σpp→ψ(2S)→μ+ μ? (2.0 < ημ± < 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. © 2014 IOP Publishing Ltd.

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Creative Commons Attribution 3.0 unported license

https://creativecommons.org/licenses/by/3.0/

Persistent DSpace Link

https://hdl.handle.net/1721.1/133733

DOI of Published Version

10.1088/0954-3899/41/5/055002