Speaker
Alexander Rothkopf
(Heidelberg University)
Description
We measured recently the complex heavy quark potential at high temperature in lattice simulations [1].
After reviewing shortly the method used, I will discuss the results obtained, explain how to understand them in terms of in-medium screening and show that this potential can be used to obtain a gauge invariant definition of the Debye screening mass [2].
This finite temperature potential also enables a description of quarkonium in a thermal medium with a Schrödinger equation, similar to what is done for the spectroscopy at zero temperature. I will show how these physical spectra inform us about the phenomenology of quarkonium melting and recombination [3] in heavy ion collision. In particular I will show first estimates for the $\Psi'$ to $J/\Psi$ ratio in nucleus-nucleus collision at RHIC and LHC, assuming production at the phase boundary and discuss the disappearance of excited states of bottomonium at the LHC.
[1] Y. Burnier, O. Kaczmarek and A. Rothkopf, Phys. Rev. Lett. 114 (2015) 8, 082001 [arXiv:1410.2546 [hep-lat]].
[2] Y. Burnier and A. Rothkopf, arXiv:1506.08684 [hep-ph].
[3] Y. Burnier, O. Kaczmarek and A. Rothkopf, in preparation.
| On behalf of collaboration: | NONE |
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Author
Dr
Yannis Olivier Burnier
(Ecole polytechnique fédérale de Lausanne)
Co-author
Alexander Rothkopf
(Heidelberg University)
