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 σ(pp → J/ψ (→ μ+ μ−))(2.0 < η_μ± < 4.5) = 307 ± 21 ± 36 pb, σ(pp → ψ(2S) (→ μ+ μ−))(2.0 < η_μ± < 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.

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2013). Exclusive J/ψ and ψ(2S) Production in pp Collisions at √s = 7 TeV. JOURNAL OF PHYSICS. G, NUCLEAR AND PARTICLE PHYSICS, 40(4), 1-17 [10.1088/0954-3899/40/4/045001].

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

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2013

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 σ(pp → J/ψ (→ μ+ μ−))(2.0 < η_μ± < 4.5) = 307 ± 21 ± 36 pb, σ(pp → ψ(2S) (→ μ+ μ−))(2.0 < η_μ± < 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.
2013
R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2013). Exclusive J/ψ and ψ(2S) Production in pp Collisions at √s = 7 TeV. JOURNAL OF PHYSICS. G, NUCLEAR AND PARTICLE PHYSICS, 40(4), 1-17 [10.1088/0954-3899/40/4/045001].
R. Aaij; C. Abellan Beteta; A. Adametz; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/134341
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