Münster 2017 – wissenschaftliches Programm
HK 58.4: Vortrag
Freitag, 31. März 2017, 15:00–15:15, F 1
Nuclear Matter with Fluctuations beyond Local Potential Approximation — •Johannes Weyrich and Lorenz von Smekal — JLU Gießen
We describe the liquid-gas transition of nuclear matter together with chiral symmetry restoration in the high baryon-density phase considering a chiral baryon-meson model for nucleons and their parity partners in mirror assignment interacting with pions, sigma and omega mesons. Beyond mean-field fluctuations have been included within the functional renormalization group in the local potential approximation (LPA) and do not lead to major qualitative changes in the phase diagram of the model. A clear first-order chiral transition at low temperatures inside the high baryon-density phase appears to be robust. An extension beyond LPA including scale dependent wave function renormalization factors for baryons and mesons is an important step towards developing a quark-meson-baryon model for a more realistic description of nuclear matter and the transition to chiral quark matter.