J/Psi suppression at forward rapidity in Pb-Pb collisions at root s(NN)=5.02 TeV

0474054 - ÚJF 2018 RIV NL eng J - Článek v odborném periodiku
Adam, J. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Broz, M. - Čepila, J. - Contreras, J. G. - Eyyubova, G. - Ferencei, Jozef - Horák, D. - Křížek, Filip - Kučera, Vít - Mareš, Jiří A. - Petráček, V. - Pospíšil, Jan - Šumbera, Michal - Vaňát, Tomáš - Závada, Petr … celkem 1009 autorů
J/Psi suppression at forward rapidity in Pb-Pb collisions at root s(NN)=5.02 TeV.
Physics Letters. B. Roč. 766, MAR (2017), s. 212-224. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT(CZ) LG15052
Institucionální podpora: RVO:68378271 ; RVO:61389005
Klíčová slova: ALICE collaboration * heavy ion collisions * quark gluon plasma
Obor OECD: Nuclear physics; Particles and field physics (FZU-D)
Impakt faktor: 4.254, rok: 2017

The inclusive J/Psi production has been studied in Pb-Pb and pp collisions at the centre-of-mass energy per nucleon pair root sNN= 5.02TeV, using the ALICE detector at the CERN LHC. The J/Psi meson is reconstructed, in the centre-of-mass rapidity interval 2.5 < y < 4and in the transverse- momentum range p(T)< 12GeV/c, via its decay to a muon pair. In this Letter, we present results on the inclusive J/Psi cross section in pp collisions at root s= 5.02TeV and on the nuclear modification factor R-AA. The latter is presented as a function of the centrality of the collision and, for central collisions, as a function of the transverse momentum p(T) of the J/Psi. The measured R-AA values indicate a suppression of the J/Psi in nuclear collisions and are then compared to our previous results obtained in Pb-Pb collisions at root sNN= 2.76TeV. The ratio of the R-AA values at the two energies is also computed and compared to calculations of statistical and dynamical models. The numerical value of the ratio for central events (0-10% centrality) is 1.17 +/- 0.04( stat)+/- 0.20(syst). In central events, as a function of p(T), a slight increase of R-AA with collision energy is visible in the region 2 < p(T)< 6GeV/c. Theoretical calculations qualitatively describe the measurements, within uncertainties.
Trvalý link: http://hdl.handle.net/11104/0271151