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Meson Screening Masses in (2+1)-Flavor QCD

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arxiv 1908.09552 v2 pith:XTTQRT45 submitted 2019-08-26 hep-lat hep-phnucl-th

Meson Screening Masses in (2+1)-Flavor QCD

Alexei Bazavov , Simon Dentinger , Heng-Tong Ding , Prasad Hegde , Olaf Kaczmarek , Frithjof Karsch , Edwin Laermann , Anirban Lahiri
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Swagato Mukherjee Hiroshi Ohno Peter Petreczky Rishabh Thakkar Hauke Sandmeyer Christian Schmidt Sayantan Sharma Patrick Steinbrecher
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classification hep-lat hep-phnucl-th
keywords latticemassesquarkresultscalculationscorrespondinglesssimmass
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We present lattice QCD results for mesonic screening masses in the temperature range 140 MeV $\lesssim T \lesssim$ 2500 MeV. Our calculations were carried out using (2+1)-flavors of the Highly Improved Staggered Quark (HISQ) action, with a physical value for the strange quark mass and two values of the light quark mass corresponding to pion masses of 160 MeV and 140 MeV. Continuum-extrapolated results were obtained using calculations with a variety of lattice spacings corresponding to temporal lattice extents $N_\tau = 6 - 16$. We discuss the implications of these results for the effective restoration of various symmetries in the high temperature phase of QCD, as well as the approach toward the perturbative limit.

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