Aarts, Gert and Allton, Chris and Hands, Simon and Jager, Benjamin and Praki, Chrisanthi and Skullerud, Jon-Ivar
(2015)
Nucleons and parity doubling across the deconfinement transition.
Physical Review D, 92 (014503).
pp. 1-6.
ISSN 1550-7998
Abstract
It is expected that nucleons and their parity partners become degenerate when chiral symmetry is
restored. We investigate this question in the context of the thermal transition from the hadronic phase to the
quark-gluon plasma, using lattice QCD simulations with Nf ¼ 2 þ 1 flavors. We observe a clear sign of
parity doubling in the quark-gluon plasma. Besides, we find that the nucleon ground state is, within the
uncertainty, largely independent of the temperature, whereas temperature effects are substantial in the
negative-parity (N*) channel, already in the confined phase.
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