The measurement of charmonium states produced in proton-neon (pNe) collisions by the LHCb experiment in its fixed-target configuration is presented. The production of J/psi and psi(2S) mesons is studied with a beam of 2.5 TeV protons colliding on gaseous neon targets at rest, cvorresponding to a nucleon-nucleon centre-of-mass energy root s(NN) = 68.5GeV. The data sample corresponds to an integrated luminosity of 21.7 +/- 1.4 nb(-1). The J/psi and psi(2S) hadrons are reconstructed in mu(+) mu(-) final states. The J/psi production cross-section per target nucleon in the centre-ofmass rapidity range y(star) is an element of[-2.29, 0] is found to be 506 +/- 8 +/- 46 nb/nucleon. The ratio of J/psi and D-0 cross-sections is evaluated to (1.06 +/- 0.02 +/- 0.09)%. The psi(2S) to J/psi relative production rate is found to be (1.67 +/- 0.27 +/- 0.10)% in good agreement with other measurements involving beam and target nuclei of similar sizes.
(2023). Charmonium production in pNe collisions at √sNN=68.5 GeV [journal article - articolo]. In EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. Retrieved from https://hdl.handle.net/10446/264458
Charmonium production in pNe collisions at √sNN=68.5 GeV
Lupato, A.;Redi, F.;
2023-01-01
Abstract
The measurement of charmonium states produced in proton-neon (pNe) collisions by the LHCb experiment in its fixed-target configuration is presented. The production of J/psi and psi(2S) mesons is studied with a beam of 2.5 TeV protons colliding on gaseous neon targets at rest, cvorresponding to a nucleon-nucleon centre-of-mass energy root s(NN) = 68.5GeV. The data sample corresponds to an integrated luminosity of 21.7 +/- 1.4 nb(-1). The J/psi and psi(2S) hadrons are reconstructed in mu(+) mu(-) final states. The J/psi production cross-section per target nucleon in the centre-ofmass rapidity range y(star) is an element of[-2.29, 0] is found to be 506 +/- 8 +/- 46 nb/nucleon. The ratio of J/psi and D-0 cross-sections is evaluated to (1.06 +/- 0.02 +/- 0.09)%. The psi(2S) to J/psi relative production rate is found to be (1.67 +/- 0.27 +/- 0.10)% in good agreement with other measurements involving beam and target nuclei of similar sizes.File | Dimensione del file | Formato | |
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