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Abstract: The cross sections for ?(1S), ?(2S), and ?(3S) production in lead?lead (PbPb) and proton?proton (pp) collisions at ?sNN=5.02 TeV have been measured using the CMS detector at the LHC. The nuclear modification factors, RAA, derived from the PbPb-to-pp ratio of yields for each state, are studied as functions of meson rapidity and transverse momentum, as well as PbPb collision centrality. The yields of all three states are found to be significantly suppressed, and compatible with a sequential ordering of the suppression, RAA(?(1S))>RAA(?(2S))>RAA(?(3S)). The suppression of ?(1S) is larger than that seen at ?sNN=2.76TeV, although the two are compatible within uncertainties. The upper limit on the RAA of ?(3S) integrated over pT, rapidity and centrality is 0.096 at 95% confidence level, which is the strongest suppression observed for a quarkonium state in heavy ion collisions to date.
Fuente: Physics Letters B, 790, 270?293 (2019)
Editorial: Elsevier
Fecha de publicación: 01/03/2019
Nº de páginas: 24
Tipo de publicación: Artículo de Revista
DOI: 10.1016/j.physletb.2019.01.006
ISSN: 0370-2693,1873-2445
Url de la publicación: https://doi.org/10.1016/j.physletb.2019.01.006
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SIRUNYAN, A. M.
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
BARBARA CHAZIN QUERO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
PEDRO JOSE FERNANDEZ MANTECA
ANDREA GARCIA ALONSO
JUAN GARCIA FERRERO
GERVASIO GOMEZ GRAMUGLIO
MARIA AMPARO LOPEZ VIRTO
JESUS MARCO DE LUCAS
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
NICOLO TREVISANI
IVAN VILA ALVAREZ
ROCIO VILAR CORTABITARTE
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