Suppression of non-prompt J/ψ, prompt J/ψ, and Υ (1S) in PbPb collisions at sNN−−−√=2.76 TeV (CROSBI ID 200659)
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Podaci o odgovornosti
Chatrchyan, S. ; ... ; Godinović, Nikola ; Lelas, Damir ; Pleština, Roko ; Polić, Dunja ; Puljak, Ivica ; Antunović, Željko ; Dželalija, Mile ; Kovač, Marko ; Brigljević, Vuko ; Đurić, Senka ; Kadija, Krešo ; Luetić, Jelena ; Morović, Srećko ; ... ; Mekterović, Darko ; ... ; Swanson, J.
engleski
Suppression of non-prompt J/ψ, prompt J/ψ, and Υ (1S) in PbPb collisions at sNN−−−√=2.76 TeV
Yields of prompt and non-prompt J/ψ, as well as Υ (1S) mesons, are measured by the CMS experiment via their μ + μ − decays in PbPb and pp collisions at sNN−−−√=2.76 TeV for quarkonium rapidity |y| < 2.4. Differential cross sections and nuclear modification factors are reported as functions of y and transverse momentum p T, as well as collision centrality. For prompt J/ψ with relatively high p T (6.5 < p T < 30 GeV/c), a strong, centrality-dependent suppression is observed in PbPb collisions, compared to the yield in pp collisions scaled by the number of inelastic nucleon-nucleon collisions. In the same kinematic range, a suppression of non-prompt J/ψ, which is sensitive to the in-medium b-quark energy loss, is measured for the first time. Also the low-p T Υ (1S) mesons are suppressed in PbPb collisions.
CMS; physics; heavy-ions
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