Bochum 2009 – wissenschaftliches Programm
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HK: Fachverband Hadronen und Kerne
HK 7: Nuclear Structure and Dynamics II
HK 7.6: Vortrag
Montag, 16. März 2009, 15:30–15:45, H-ZO 50
Chiral Effective Field Theory for Nuclear Matter — •Andre Lacour1, Jose Antonio Oller2, and Ulf-G. Meißner1,3 — 1Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn, Nußallee 14-16, D-53115 Bonn, Germany — 2Departamento de Fisica. Universidad de Murcia. E-30071 Murcia, Spain — 3Forschungszentrum Jülich, Institut für Kernphysik (Theorie), D-52425 Jülich, Germany
A novel chiral power counting for nuclear matter with nucleons and pions as degrees of freedom will be presented. This allows for systematic expansion taking into account both local as well as pion-mediated inter-nucleon interactions. It also identifies some non-perturbative string of diagrams, related to NN initial and final state interactions, to be resummed. We have applied this power counting to the pion self-energy in asymmetric nuclear matter.