Exclusive J /ψ and ψ(2 S ) production in pp collisions at √s = 7 TeV

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Exclusive J /ψ and ψ(2 S ) production in pp collisions at √s = 7 TeV

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Aaij_2013_J._Phys._G _Nucl._Part._Phys._40_045001.pdf

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Date Issued

2013

Journal

Journal of Physics G: Nuclear and Particle Physics

Publisher

IOP Publishing

Citation

Aaij, R., et al. "Exclusive J/Psi and Psi(2s) Production in Pp Collisions at Root S=7 Tev." Journal of Physics G-Nuclear and Particle Physics 40 4 (2013): 17.

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Final published version

Abstract

Exclusive J/ψ and ψ(2S) vector meson production has been observed in the dimuon channel using the LHCb detector. The cross-section times branching fractions to two muons with pseudorapidities between 2.0 and 4.5 are measured to be σpp→J/ψ(→μ+ μ -)(2.0 < ημ± < 4.5) = 307 ±21 ±36 pb σpp→ψ (2S)( →μ+ μ -))(2.0 < ημ± < 4.5) = 7.8 ±1.3 ±1.0 pb where the first uncertainties are statistical and the second are systematic. The measurements are found to be in good agreement with results from previous experiments and theoretical predictions. The J/ψ photoproduction cross-section has been measured as a function of the photon-proton centre-of-mass energy. The results are consistent with measurements obtained at HERA and confirm a similar power law behaviour for the photoproduction cross-section. © CERN 2013 On behalf of the LHCb Collaboration.

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Persistent DSpace Link

https://hdl.handle.net/1721.1/133799

DOI of Published Version

10.1088/0954-3899/40/4/045001