ϒ suppression at forward rapidity in Pb–Pb collisions at s<inf>NN</inf>=5.02TeV



Acharya, S, Acosta, FT, Adamová, D, Adolfsson, J, Aggarwal, MM, Aglieri Rinella, G, Agnello, M, Agrawal, N, Ahammed, Z, Ahn, SU
et al (show 90 more authors) (2019) ϒ suppression at forward rapidity in Pb–Pb collisions at s<inf>NN</inf>=5.02TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 790. 89 - 101.

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Abstract

© 2018 Inclusive ϒ(1S) and ϒ(2S) production have been measured in Pb–Pb collisions at the centre-of-mass energy per nucleon–nucleon pair sNN=5.02 TeV, using the ALICE detector at the CERN LHC. The ϒ mesons are reconstructed in the centre-of-mass rapidity interval 2.5<y<4 and in the transverse-momentum range pT<15 GeV/c, via their decays to muon pairs. In this Letter, we present results on the inclusive ϒ(1S) nuclear modification factor RAA as a function of collision centrality, transverse momentum and rapidity. The ϒ(1S) and ϒ(2S) RAA, integrated over the centrality range 0–90%, are 0.37±0.02(stat)±0.03(syst) and 0.10±0.04(stat)±0.02(syst), respectively, leading to a ratio RAAϒ(2S)/RAAϒ(1S) of 0.28±0.12(stat)±0.06(syst). The observed ϒ(1S) suppression increases with the centrality of the collision and no significant variation is observed as a function of transverse momentum and rapidity.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 15 Aug 2019 10:18
Last Modified: 10 Sep 2021 07:16
DOI: 10.1016/j.physletb.2018.11.067
Open Access URL: https://doi.org/10.1016/j.physletb.2018.11.067
URI: https://livrepository.liverpool.ac.uk/id/eprint/3051830