Bonn 2010 – wissenschaftliches Programm
HK 3.4: Vortrag
Montag, 15. März 2010, 17:30–17:45, HG II
Chiral Effective Field Theory for Nuclear Matter — •Andre Lacour1, Jose Antonio Oller2, and Ulf-G. Meissner1,3 — 1Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn, Germany — 2Departamento de Física, Universidad de Murcia, E-30071 Murcia, Spain — 3Institut für Kernphysik, Institute for Advanced Simulation and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425 Jülich, Germany
Recently a novel chiral power counting for nuclear matter with nucleons and pions as degrees of freedom has been developed. It allows for a systematic expansion taking into account both local and pion-mediated inter-nucleon interactions. It also identifies some non-perturbative strings of diagrams, related to iterated nucleon-nucleon interactions, which have to be re-summed. Unitary chiral perturbation theory has been proven to be a useful tool for taking into account the non-perturbative nature of the nucleon-nucleon interaction. In my talk I will review the most recent progress employing both techniques and will present results of the calculations for the ground state energy density of nuclear matter and the in-medium chiral quark condensate.