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

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URI: https://hdl.handle.net/10902/26623
ISSN: 1126-6708
ISSN: 1029-8479
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Autoría
Chatrchyan, S.; Brochero Cifuentes, Javier AndrésAutoridad Unican; Cabrillo Bartolomé, José IbanAutoridad Unican; Calderón Tazón, AliciaAutoridad Unican; Chuang, S. H.; Duarte Campderros, JorgeAutoridad Unican; Felcini, Marta; Fernández García, MarcosAutoridad Unican; Gómez Gramuglio, GervasioAutoridad Unican; González Sánchez, Francisco JavierAutoridad Unican; Jordá Lope, Clara; Lobelle Pardo, Patricia; López Virto, María Amparo; Marco de Lucas, JesúsAutoridad Unican; Marco de Lucas, Rafael José; Martínez Rivero, Celso; Matorras Weinig, FranciscoAutoridad Unican; Muñoz Sánchez, Francisca Javiela; Piedra Gómez, JonatanAutoridad Unican; [et al.]
Fecha
2012-05-14
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Attribution 4.0 International. ©CERN, for the benefit of the CMS collaboration
Publicado en
Journal of High Energy Physics 2012, 2012(5), 63
Editorial
Springer Verlag
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Palabras clave
Heavy Ions
Resumen/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.
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