A measurement of D-0 meson production by the LHCb experiment in its fixed-target configuration is presented. The production of D-0 mesons is studied with a beam of 2.5 TeV protons colliding on a gaseous neon target at rest, corresponding to a nucleon-nucleon centre-of-mass energy of root s(NN) = 68.5 GeV. The sum of the D-0 and (D-0) over bar production cross-section in pNe collisions in the centre-of-mass rapidity range y(star) is an element of[-2.29, 0] is found to be sigma(y star is an element of[-2.29, 0])(D0) = 48.2 +/- 0.3 +/- 4.5 mu b/nucleon where the first uncertainty is statistical and the second is systematic. The D-0 - (D-0) over bar production asymmetry is also evaluated and suggests a trend towards negative values at large negative y(star). The considered models do not account precisely for all the features observed in the LHCb data, but theoretical predictions including 1% intrinsic charm and 10% recombination contributions better describe the data than the other models considered.

Aaij, R., Abdelmotteleb, A., Beteta, C.a., Abudinen, F., Ackernley, T., Adeva, B., et al. (2023). Open charm production and asymmetry in pNe collisions at √sNN=68.5 GeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 83(6) [10.1140/epjc/s10052-023-11641-5].

Open charm production and asymmetry in pNe collisions at √sNN=68.5 GeV

Archilli, F.;Santovetti, E.;
2023-06-27

Abstract

A measurement of D-0 meson production by the LHCb experiment in its fixed-target configuration is presented. The production of D-0 mesons is studied with a beam of 2.5 TeV protons colliding on a gaseous neon target at rest, corresponding to a nucleon-nucleon centre-of-mass energy of root s(NN) = 68.5 GeV. The sum of the D-0 and (D-0) over bar production cross-section in pNe collisions in the centre-of-mass rapidity range y(star) is an element of[-2.29, 0] is found to be sigma(y star is an element of[-2.29, 0])(D0) = 48.2 +/- 0.3 +/- 4.5 mu b/nucleon where the first uncertainty is statistical and the second is systematic. The D-0 - (D-0) over bar production asymmetry is also evaluated and suggests a trend towards negative values at large negative y(star). The considered models do not account precisely for all the features observed in the LHCb data, but theoretical predictions including 1% intrinsic charm and 10% recombination contributions better describe the data than the other models considered.
27-giu-2023
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/01
English
Con Impact Factor ISI
DECAY
10.1140/epjc/s10052-023-11815-1
Aaij, R., Abdelmotteleb, A., Beteta, C.a., Abudinen, F., Ackernley, T., Adeva, B., et al. (2023). Open charm production and asymmetry in pNe collisions at √sNN=68.5 GeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 83(6) [10.1140/epjc/s10052-023-11641-5].
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