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arXiv · 2311.17761

Baryonic Screening Masses in High Temperature QCD

Pietro Rescigno·Leonardo Giusti·Tim Harris·Davide Laudicina·Michele Pepe
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Abstract

We compute the screening masses of fields with nucleon quantum numbers for a wide range of temperatures between $T \sim 1$ GeV and $T\sim 160$ GeV. The computation has been performed by means of Monte Carlo simulations of lattice QCD with $N_f=3$ flavors of $O(a)$-improved Wilson fermions: we exploit a novel strategy which has recently allowed to determine for the first time non-singlet mesonic screening masses up to extremely high temperatures. The baryonic screening masses are measured with a few per-mille precision in the continuum limit, and percent deviations from the free theory result $3\pi T$ are clearly visible even at the highest temperatures. The observed degeneracy of the positive and negative parity state's screening mass, expected from Ward identities associated to non-singlet axial transformations, provides further evidence for the restoration of chiral symmetry in the high temperature regime of QCD.

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Pietro Rescigno, Leonardo Giusti, Tim Harris, Davide Laudicina, Michele Pepe. 2023-11-29. Baryonic Screening Masses in High Temperature QCD. https://arxiv.org/abs/2311.17761

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