학술논문
Open charm production and asymmetry in pNe collisions at sNN=68.5GeV.
Document Type
Article
Author
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou, C.; Aidala, C. A.; Ajaltouni, Z.; Akar, S.; Akiba, K.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.; Aliouche, Z.; Alvarez Cartelle, P.
Source
Subject
*PARTICLES (Nuclear physics)
*MESONS
*PROTONS
*NEON
*PROTON-proton interactions
*FORECASTING
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Language
ISSN
1434-6044
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 Te V protons colliding on a gaseous neon target at rest, corresponding to a nucleon–nucleon centre-of-mass energy of s NN = 68.5 Ge V . The sum of the D 0 and D ¯ 0 production cross-section in p Ne collisions in the centre-of-mass rapidity range y ⋆ ∈ [ - 2.29 , 0 ] is found to be σ D 0 y ⋆ ∈ [ - 2.29 , 0 ] = 48.2 ± 0.3 ± 4.5 μ b / nucleon where the first uncertainty is statistical and the second is systematic. The D 0 - D ¯ 0 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. [ABSTRACT FROM AUTHOR]