In-medium P-wave quarkonium from the complex lattice QCD potential

Yannis Burnier (Institute of Theoretical Physics, EPFL, CH-1015, Lausanne, Switzerland) ; Olaf Kaczmarek (Fakultät für Physik, Universität Bielefeld, D-33615, Bielefeld, Germany) ; Alexander Rothkopf (Institute for Theoretical Physics, Heidelberg University, Philosophenweg 16, 69120, Heidelberg, Germany)

We extend our lattice QCD potential based study [1] of the in-medium properties of heavy quark bound states to P-wave bottomonium and charmonium. Similar to the behavior found in the S-wave channel their spectra show a characteristic broadening, as well as mass shifts to lower energy with increasing temperature. In contrast to the S-wave states, finite angular momentum leads to the survival of spectral peaks even at temperatures, where the continuum threshold reaches below the bound state remnant mass. We elaborate on the ensuing challenges in defining quarkonium dissolution and present estimates of melting temperatures for the spin averaged χ b and χ c states. As an application to heavy-ion collisions we further estimate the contribution of feed down to S-wave quarkonium through the P-wave states after freezeout.

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      "value": "We extend our lattice QCD potential based study [1] of the in-medium properties of heavy quark bound states to P-wave bottomonium and charmonium. Similar to the behavior found in the S-wave channel their spectra show a characteristic broadening, as well as mass shifts to lower energy with increasing temperature. In contrast to the S-wave states, finite angular momentum leads to the survival of spectral peaks even at temperatures, where the continuum threshold reaches below the bound state remnant mass. We elaborate on the ensuing challenges in defining quarkonium dissolution and present estimates of melting temperatures for the spin averaged \u03c7 b and \u03c7 c states. As an application to heavy-ion collisions we further estimate the contribution of feed down to S-wave quarkonium through the P-wave states after freezeout."
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Published on:
07 October 2016
Publisher:
Springer/SISSA
Published in:
Journal of High Energy Physics (2016)

DOI:
https://doi.org/10.1007/JHEP10(2016)032
arXiv:
1606.06211
Copyrights:
The Author(s)
Licence:
CC-BY-4.0

Fulltext files: