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Suppression of non-prompt J/?, prompt J/?, and ?(1S) in PbPb collisions at sNN????=2.76 TeV

Abstract: Yields of prompt and non-prompt J/?, as well as ?(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 pT, as well as collision centrality. For prompt J/? with relatively high pT (6.5 < pT < 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/?, which is sensitive to the in-medium b-quark energy loss, is measured for the first time. Also the low-pT ?(1S) mesons are suppressed in PbPb collisions.

Authorship: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hammer J., Hoch M., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Krammer M., Liko D., Mikulec I., Pernicka M., Rahbaran B., Rohringer C., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Teischinger F., Wagner P., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V

Fuente: Journal of High Energy Physics, 2012, 2012(5), 63

Publisher: Springer Verlag

Publication date: 01/05/2012

No. of pages: 54

Publication type: Article

DOI: 10.1007/JHEP05(2012)063

ISSN: 1126-6708,1029-8479

Publication Url: https://doi.org/10.1007/JHEP05(2012)063

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