Quarkonium dissociation in perturbative QCD

Juhee Hong, Su Houng Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)


For weakly bound quarkonia, we rederive the next-to-leading order cross sections of quarkonium dissociation by partons that include the hard thermal loop (HTL) resummation. Our results calculated with an effective vertex from the Bethe-Salpeter amplitude reduce to those obtained by potential nonrelativistic QCD (pNRQCD) in the relevant kinematical limit, and they can be used in a wide temperature range applicable to heavy-quark systems in heavy-ion collisions. Based on the lattice computation of the temperature-dependent binding energy, our numerical analysis on ϒ(1S) indicates that at high temperature the dominant mechanism for quarkonium dissociation is inelastic parton scattering as expected in the quasifree approximation, while it is gluo-dissociation at low temperature. By comparing with the momentum diffusion coefficient of a heavy quark, we discuss possible O(g) corrections to the next-to-leading-order thermal width.

Original languageEnglish
Article number034905
JournalPhysical Review C
Issue number3
Publication statusPublished - 2019 Mar 15

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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