A measurement of D meson production by the LHCb experiment in its fixed-target configuration is presented. The production of D 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 sNN=68.5GeV . The sum of the D and D¯ production cross-section in pNe collisions in the centre-of-mass rapidity range y⋆∈ [- 2.29 , 0] is found to be σD0y⋆∈[-2.29,0]=48.2±0.3±4.5μb/nucleon where the first uncertainty is statistical and the second is systematic. The D- D¯ production asymmetry is also evaluated and suggests a trend towards negative values at large negative y⋆ . 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.

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

Graverini E.;Punzi G.;
2023-01-01

Abstract

A measurement of D meson production by the LHCb experiment in its fixed-target configuration is presented. The production of D 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 sNN=68.5GeV . The sum of the D and D¯ production cross-section in pNe collisions in the centre-of-mass rapidity range y⋆∈ [- 2.29 , 0] is found to be σD0y⋆∈[-2.29,0]=48.2±0.3±4.5μb/nucleon where the first uncertainty is statistical and the second is systematic. The D- D¯ production asymmetry is also evaluated and suggests a trend towards negative values at large negative y⋆ . 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.
2023
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinen, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou,...espandi
File in questo prodotto:
File Dimensione Formato  
s10052-023-11641-5.pdf

accesso aperto

Tipologia: Versione finale editoriale
Licenza: Creative commons
Dimensione 1.91 MB
Formato Adobe PDF
1.91 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1220680
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 6
social impact