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

Understand

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.