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  • ϒ suppression at forward ra...
    Acharya, S.; Aiola, S.; Anaam, M.N.; Antinori, F.; Aphecetche, L.; Arcelli, S.; Batyunya, B.; Batzing, P.C.; Bello Martinez, H.; Bercuci, A.; Bianchi, A.; Bianchi, L.; Bielčíková, J.; Biro, G.; Biswas, R.; Blair, J.T.; Bombara, M.; Bourjau, C.; Buncic, P.; Caliva, A.; Carena, F.; Chartier, M.; Chattopadhyay, S.; Colella, D.; Cormier, T.M.; Cosentino, M.R.; Danisch, M.C.; De, S.; de Conti, C.; Dietel, T.; Eum, J.; Faivre, J.; Figueredo, M.A.S.; Floris, M.; Gaardhøje, J.J.; Gajdosova, K.; Garabatos, C.; Gotovac, S.; Grigoras, C.; Gupta, A.; Haake, R.; Hadjidakis, C.; Hellbär, E.; Hillemanns, H.; Huang, C.; Izucheev, V.; Khabanova, Z.; Kim, D.; Kiselev, S.; Klein, J.; Knospe, A.G.; Konyushikhin, M.; Kučera, V.; Kumar, S.; Kurepin, A.; Li, X.L.; Marchisone, M.; Martínez García, G.; Massacrier, L.; Meza, C.S.; Miake, Y.; Mohammadi, N.; Mohanty, A.P.; Muhuri, S.; Munhoz, M.G.; Myrcha, J.W.; Nappi, E.; Ng, F.; Nomokonov, P.; Oravec, M.; Oyama, K.; Pacik, V.; Palni, P.; Paul, B.; Pillot, P.; Rehman, A.; Ren, X.; Rohr, D.; Rosas, E.D.; Saarinen, S.; Šafařík, K.; Scapparone, E.; Schaefer, B.; Shaikh, W.; Sharma, M.; Shigaki, K.; Shou, Q.; Sielewicz, K.M.; Siemiarczuk, T.; Tariq, M.; Thakur, S.; Tropp, L.; Trubnikov, V.; van Leeuwen, M.; Vértesi, R.; Vinogradov, A.; Weiser, D.F.; Wilkinson, J.; Zimmermann, M.B.; Zou, S.

    Physics letters. B, 03/2019, Letnik: 790
    Journal Article

    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.