Quarkonium suppression in heavy-ion collisions: An open quantum system approach

Nora Brambilla, Miguel A. Escobedo, Joan Soto, Antonio Vairo

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111 Scopus citations


We address the evolution of heavy-quarkonium states in an expanding quark-gluon plasma by implementing effective field theory techniques in the framework of open quantum systems. In this setting we compute the nuclear modification factors for quarkonia that are S-wave Coulombic bound states in a strongly coupled quark-gluon plasma. The calculation is performed at an accuracy that is leading order in the heavy-quark density expansion and next-to-leading order in the multipole expansion. The quarkonium density-matrix evolution equations can be written in the Lindblad form, and, hence, they account for both dissociation and recombination. Thermal mass shifts, thermal widths and the Lindblad equation itself depend on only two nonperturbative parameters: the heavy-quark momentum diffusion coefficient and its dispersive counterpart. Finally, by numerically solving the Lindblad equation, we provide results for the (1S) and (2S) suppression.

Original languageEnglish
Article number034021
JournalPhysical Review D
Issue number3
StatePublished - 1 Aug 2017


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