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arXiv · 2107.11368

The bottomonium melting from screening correlators at high temperature

Peter Petreczky·Sayantan Sharma·Johannes Heinrich Weber
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Abstract

We study the bottomonium screening masses in a 2+1 flavor QCD medium on the lattice using the Highly Improved Staggered Quark(HISQ) discretization for the quarks. We focus on a wide temperature range in the region $350~{\rm MeV}\le T < 1000 ~{\rm MeV}$, and perform our calculations on three different lattice spacings to control the lattice cut-off effects, corresponding to temporal lattice extent of $N_\tau=8,10,12$. From a detailed study of the temperature dependence of screening masses we conclude that while the $\eta_b(1S)$ and $\Upsilon(1S)$ states melt at $T>500$ MeV, the scalar and axial-vector states $\chi_{b0}(1P)$ and $h_b(1P)$ melt already at $T>350$ MeV.

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Peter Petreczky, Sayantan Sharma, Johannes Heinrich Weber. 2021-07-23. The bottomonium melting from screening correlators at high temperature. https://doi.org/10.1103/physrevd.104.054511

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