Transport coefficients from in-medium quarkonium dynamics
Brambilla, N., Escobedo, M. A., Vairo, A., & Vander Griend, P. (2019). Transport coefficients from in-medium quarkonium dynamics. Physical Review D, 100(5), Article 054025. https://doi.org/10.1103/PhysRevD.100.054025
Published inPhysical Review D
© Authors, 2019
The in-medium dynamics of heavy particles are governed by transport coefficients. The heavy quark momentum diffusion coefficient, kappa, is an object of special interest in the literature, but one which has proven notoriously difficult to estimate, despite the fact that it has been computed by weak-coupling methods at next-to-leading order accuracy, and by lattice simulations of the pure SU(3) gauge theory. Another coefficient, gamma, has been recently identified. It can be understood as the dispersive counterpart of kappa. Little is known about gamma. Both kappa and gamma arc, however, of foremost importance in heavy quarkonium physics as they entirely determine the in and out of equilibrium dynamics of quarkonium in a medium, if the evolution of the density matrix is Markovian, and the motion, quantum Brownian; the medium could be a strongly or weakly coupled plasma. In this paper, using the relation between kappa, gamma and the quarkonium in-medium width and mass shift respectively, we evaluate the two coefficients from existing 2 + 1 flavor lattice QCD data. The resulting range for kappa is consistent with earlier determinations, the one for gamma is the first nonperturbative determination of this quantity. ...
PublisherAmerican Physical Society
ISSN Search the Publication Forum2470-0010
Publication in research information system
MetadataShow full item record
Related funder(s)Academy of Finland
Funding program(s)Academy Project, AoF
Additional information about fundingThis work was funded by the Bundesministerium für Bildung und Forschung Project No. 05P2018 and by the DFG cluster of excellence “Universe” (www.universe-cluster.de). The work of M. A. E. was supported by the Academy of Finland Project No. 297058, by Ministerio de Ciencia e Innovacion of Spain under Project No. FPA2017-83814-P and Maria de Maetzu Unit of Excellence MDM-2016- 0692, by Xunta de Galicia and FEDER. ...
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