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Production of muons from heavy-flavour hadron decays in p–Pb collisions at sNN=5.02 TeV
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Production of muons from heavy-flavour hadron decays in p–Pb collisions at sNN=5.02 TeV

S. Acharya, D. Adamová, M.M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, N. Ahmad, S.U. Ahn, S. Aiola, …
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 卷.770, 頁碼.459-472
07/2017
DOI: https://doi.org/10.1016/j.physletb.2017.03.049

摘要

Nuclear and High Energy Physics
The production of muons from heavy-flavour hadron decays in p–Pb collisions at s <sub>NN</sub> =5.02 TeV was studied for 2<p <sub>T</sub> <16 GeV/c with the ALICE detector at the CERN LHC. The measurement was performed at forward (p-going direction) and backward (Pb-going direction) rapidity, in the ranges of rapidity in the centre-of-mass system (cms) 2.03<y <sub>cms</sub> <3.53 and −4.46<y <sub>cms</sub> <−2.96, respectively. The production cross sections and nuclear modification factors are presented as a function of transverse momentum (p <sub>T</sub> ). At forward rapidity, the nuclear modification factor is compatible with unity while at backward rapidity, in the interval 2.5<p <sub>T</sub> <3.5 GeV/c, it is above unity by more than 2σ. The ratio of the forward-to-backward production cross sections is also measured in the overlapping interval 2.96<|y <sub>cms</sub> |<3.53 and is smaller than unity by 3.7σ in 2.5<p <sub>T</sub> <3.5 GeV/c. The data are described by model calculations including cold nuclear matter effects.

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