A1 Journal article (refereed)
Quantum and Classical Dynamics of Heavy Quarks in a Quark-Gluon Plasma (2019)

Escobedo Espinosa, M., & Blaizot, J.-P. (2019). Quantum and Classical Dynamics of Heavy Quarks in a Quark-Gluon Plasma. Nuclear Physics A, 982, 707-710. https://doi.org/10.1016/j.nuclphysa.2018.10.025

JYU authors or editors

Publication details

All authors or editors: Escobedo Espinosa, Miguel; Blaizot, Jean-Paul

Journal or series: Nuclear Physics A

ISSN: 0375-9474

eISSN: 1873-1554

Publication year: 2019

Volume: 982

Issue number: 0

Pages range: 707-710

Publisher: Elsevier BV

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.nuclphysa.2018.10.025

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/62738

Additional information: Special Issue: The 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions: Quark Matter 2018 (Quark Matter 2018), 13-19 May 2018 • Lido di Venezia, Italy.


Heavy quarkonium related observables are very useful to obtain information about the medium created in relativistic heavy ion collisions. In recent years the theoretical description of quarkonium in a medium has moved towards a more dynamical picture in which decay and recombination processes are very important. In this talk we will discuss the equations that describe the evolution of the heavy quark reduced density matrix in different approximations, highlighting the color dynamics that is absent in the Abelian case, and we will study their semi-classical limit. This will allow us to obtain stochastic equations (similar to Langevin or Boltzmann equations) that can be useful to obtain phenomenological predictions. We will observe that the region of validity of the Langevin-like or Boltzmann-like equations in QCD is much smaller than the corresponding QED case. The reason for this can be understood by studying how differently the free energy evolves in these two theories, and this observation will allow us to propose an equation with a small computational cost that captures many of the essential features of quarkonium evolution in a QCD plasma. These results are based on [J.-P. Blaizot, M. A. Escobedo, Quantum and classical dynamics of heavy quarks in a quark-gluon plasma, JHEP 06 (2018) 034. arXiv:1711.10812, doi:10.1007/JHEP06(2018)034; J.-P. Blaizot, M. A. Escobedo, The approach to equilibrium of a quarkonium in a quark-gluon plasma. arXiv:1803.07996].

Keywords: particle physics; quark-gluon plasma

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Ministry reporting: Yes

Reporting Year: 2019

JUFO rating: 1

Last updated on 2021-08-06 at 19:51