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Baryons in the plasma: in-medium effects and parity doubling

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arxiv 1710.00566 v1 pith:WS53GXVU submitted 2017-10-02 hep-lat hep-phnucl-th

Gert Aarts , Chris Allton , Davide de Boni , Simon Hands , Benjamin Jäger , Chrisanthi Praki , Jon-Ivar Skullerud This is my paper · ORCID
classification hep-lathep-phnucl-th
keywords massestemperaturebaryonsdoublingnegative-parityparityplasmaseen
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We investigate the fate of baryons made out of u, d and s quarks in the hadronic gas and the quark-gluon plasma, using nonperturbative lattice simulations, employing the FASTSUM anisotropic Nf=2+1 ensembles. In the confined phase a strong temperature dependence is seen in the masses of the negative-parity groundstates, while the positive-parity groundstate masses are approximately temperature independent, within the error. At high temperature parity doubling emerges. A noticeable effect of the heavier s quark is seen. We give a simple description of the medium-dependent masses for the negative-parity states and speculate on the relevance for heavy-ion phenomenology via the hadron resonance gas.

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  1. Origin of nucleon mass in the light of PSR J0614-3329 with quark-hadron crossover

    nucl-th 2025-09 conditional novelty 5.0 of 10

    The parity doublet model combined with the new NICER radius measurement restricts the chiral invariant nucleon mass m0 to 800-860 MeV, implying it is at least 85% of the nucleon mass.

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