In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2012, No. 5 ( 2012-05)
Abstract:
Yields of prompt and non-prompt J/ ψ , as well as $ \Upsilon $ (1S) mesons, are measured by the CMS experiment via their μ + μ − decays in PbPb and pp collisions at $ \sqrt {{{s_{\text{NN}}}}} = 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 $ \Upsilon $ (1S) mesons are suppressed in PbPb collisions.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP05(2012)063
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2012
detail.hit.zdb_id:
2027350-2
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