Suppression of psi(2S) production in p-Pb collisions at root s(NN)=5.02 TeV

0440761 - ÚJF 2015 RIV NL eng J - Článek v odborném periodiku
Abelev, B. - Adam, J. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Broz, M. - Čepila, J. - Ferencei, Jozef - Hladký, Jan - Křelina, M. - Křížek, Filip - Kučera, Vít - Kushpil, Svetlana - Mareš, Jiří A. - Pachr, M. - Petráček, V. - Petráň, M. - Schulc, M. - Špaček, M. - Šumbera, Michal - Vajzer, Michal - Wagner, V. - Zach, Č. - Závada, Petr … celkem 947 autorů
Suppression of psi(2S) production in p-Pb collisions at root s(NN)=5.02 TeV.
Journal of High Energy Physics. Roč. 2014, č. 12 (2014), s. 073. ISSN 1126-6708
Grant CEP: GA MŠMT(CZ) LG13031
Institucionální podpora: RVO:68378271 ; RVO:61389005
Klíčová slova: charm physics * heavy ions * ALICE collaboration
Obor OECD: Nuclear physics; Particles and field physics (FZU-D)
Impakt faktor: 5.618, rok: 2012

Abstract: The ALICE Collaboration has studied the inclusive production of the charmonium state psi(2S) in proton-lead (p-Pb) collisions at the nucleon-nucleon centre of mass energy (formula presented.) = 5.02 TeV at the CERN LHC. The measurement was performed at forward (2.03 < ycms< 3.53) and backward (−4.46 < ycms< −2.96) centre of mass rapidities, studying the decays into muon pairs. In this paper, we present the inclusive production cross sections σψ(2S), both integrated and as a function of the transverse momentum pT, for the two ycms domains. The results are compared to those obtained for the 1S vector state (J/psi), by showing the ratios between the production cross sections, as well as the double ratios between p-Pb and proton-proton collisions. Finally, the nuclear modification factor for inclusive ψ(2S) is evaluated and compared to the measurement of the same quantity for J/ψ and to theoretical models including parton shadowing and coherent energy loss mechanisms. The results show a significantly larger suppression of the psi(2S) compared to that measured for J/ψ and to models. These observations represent a clear indication for sizeable final state effects on psi(2S) production
Trvalý link: http://hdl.handle.net/11104/0243854