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

MPS-Authors
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Schmelling,  M.       
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Zavertyaev,  M.       
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Citation

LHCb Collaboration, Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinén, F., Ackernley, T., et al. (2023). Open charm production and asymmetry in pNe collisions at √sNN = 68.5 GeV. European Physical Journal C - Particles and Fields, 83: 541. doi:10.1140/epjc/s10052-023-11641-5.


Cite as: https://hdl.handle.net/21.11116/0000-000D-E227-8
Abstract
A measurement of D0 meson production by the LHCb experiment in its fixed-target configuration is pre- sented. The production of D0 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 = 68.5 GeV. The sum of the D0 and D0 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 ± 4.5 μb/nucleon where the first uncertainty is statistical and the second is systematic. The D0 − D0 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.