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J/ψ production as a function of charged-particle pseudorapidity density in p–Pb collisions at sNN=5.02TeV
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J/ψ production as a function of charged-particle pseudorapidity density in p–Pb collisions at sNN=5.02TeV

D. Adamová, M.M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, N. Ahmad, S.U. Ahn, S. Aiola, A. Akindinov, …
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 卷.776, 頁碼.91-104
01/2018
DOI: https://doi.org/10.1016/j.physletb.2017.11.008

摘要

Nuclear and High Energy Physics
We report measurements of the inclusive J/ψ yield and average transverse momentum as a function of charged-particle pseudorapidity density dN ch /dη in p–Pb collisions at s NN =5.02TeV with ALICE at the LHC. The observables are normalised to their corresponding averages in non-single diffractive events. An increase of the normalised J/ψ yield with normalised dN ch /dη, measured at mid-rapidity, is observed at mid-rapidity and backward rapidity. At forward rapidity, a saturation of the relative yield is observed for high charged-particle multiplicities. The normalised average transverse momentum at forward and backward rapidities increases with multiplicity at low multiplicities and saturates beyond moderate multiplicities. In addition, the forward-to-backward nuclear modification factor ratio is also reported, showing an increasing suppression of J/ψ production at forward rapidity with respect to backward rapidity for increasing charged-particle multiplicity.

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