Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Physical review. D, 2017-08, Vol.96 (3), Article 034021

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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 ϒ(1S) and ϒ(2S) suppression.