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Υ suppression at forward rapidity in Pb-Pb collisions at √sNN = 5.02 TeV

(ALICE Collaboration) Acharya, S.; Antičić, Tome; Erhardt, Filip; Gotovac, Sven; Jerčić, Marko; Lončar, Petra; Mudnić, Eugen; Planinić, Mirko; Poljak, Nikola; Simatović, Goran; Utrobičić, Antonija; Vicković, Linda; Zou, s. (2019) Υ suppression at forward rapidity in Pb-Pb collisions at √sNN = 5.02 TeV. Physics Letters B, 790 . pp. 89-101. ISSN 0370-2693

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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 y<2.5, 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
Uncontrolled Keywords: heavy ion: scattering ; muon: pair ; rapidity ; transverse momentum ; suppression ; nucleon nucleon ; CERN LHC Coll ; CERN Lab ; nucleus ; ALICE ; meson
Subjects: NATURAL SCIENCES > Physics
Divisions: Division of Experimental Physics
Depositing User: Vuko Brigljević
Date Deposited: 22 Aug 2019 13:26
DOI: 10.1016/j.physletb.2018.11.067

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