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High Energy Physics - Lattice

arXiv:2111.11237 (hep-lat)
[Submitted on 22 Nov 2021]

Title:Phase diagram of QCD in a magnetic background

Authors:Massimo D'Elia, Lorenzo Maio, Francesco Sanfilippo, Alfredo Stanzione
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Abstract:We provide numerical evidence that the thermal QCD crossover turns into a first order transition in the presence of large enough magnetic background fields. The critical endpoint is found to be located between $eB = 4$ GeV$^2$ (where the pseudocritical temperature is $T_c = (98 \pm 3)$ MeV) and $eB = 9$ GeV$^2$ (where the critical temperature is $T_c = (63 \pm 5)$ MeV). Results are based on the analysis of quark condensates and number susceptibilities, determined by lattice simulations of $N_f = 2+1$ QCD at the physical point, discretized with three different lattice spacings, $a = 0.114, 0.086$ and $0.057$ fm, via rooted stout staggered fermions and a Symanzik tree level improved pure gauge action. We also present preliminary results regarding the confining properties of the thermal theory, suggesting that they could change drastically going across the phase transition
Comments: 11 pages, 14 figures
Subjects: High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th)
Cite as: arXiv:2111.11237 [hep-lat]
  (or arXiv:2111.11237v1 [hep-lat] for this version)
  https://doi.org/10.48550/arXiv.2111.11237
Related DOI: https://doi.org/10.1103/PhysRevD.105.034511

Submission history

From: Lorenzo Maio [view email]
[v1] Mon, 22 Nov 2021 14:37:11 UTC (3,072 KB)
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