Peer-Reviewed Journal Details
Mandatory Fields
Aarts G.;Allton C.;De Boni D.;Hands S.;Jäger B.;Praki C.;Skullerud J.
Journal of High Energy Physics
Light baryons below and above the deconfinement transition: medium effects and parity doubling
39 ()
Optional Fields
Lattice Quantum Field Theory Phase Diagram of QCD Quark-Gluon Plasma Thermal Field Theory
© 2017, The Author(s). We study what happens to the N , Δ and Ω baryons in the hadronic gas and the quark-gluon plasma, with particular interest in parity doubling and its emergence as the plasma is heated. This is done using simulations of lattice QCD, employing the FASTSUM anisotropic Nf= 2 + 1 ensembles, with four temperatures below and four above the deconfinement transition temperature. Below Tcwe find that the positive-parity groundstate masses are largely temperature independent, whereas the negative-parity ones are reduced considerably as the temperature increases. This may be of interest for heavy-ion phenomenology. Close to the transition, the masses are nearly degenerate, in line with the expectation from chiral symmetry restoration. Above Tcwe find a clear signal of parity doubling in all three channels, with the effect of the heavier s quark visible.
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