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HK: Fachverband Hadronen und Kerne
HK 7: Nuclear Structure and Dynamics II
HK 7.1: Invited Group Report
Monday, March 16, 2009, 14:00–14:30, H-ZO 50
Applications of in-medium chiral dynamics — •Paolo Finelli1, Norbert Kaiser2, Dario Vretenar3, and Wolfram Weise2 — 1Physics Department, University of Bologna and INFN (Italy) — 2Physik Department, Technische Universität München — 3Physics Department, University of Zagreb (Croatia)
A relativistic nuclear energy density functional is developed, guided by two important features that establish connections with chiral dynamics and the symmetry breaking pattern of low-energy QCD:
a) strong scalar and vector fields related to in-medium changes of QCD vacuum condensates;
b) long- and intermediate-range interactions generated by one-and two-pion exchange, derived from in-medium chiral perturbation theory, with explicit inclusion of Δ(1232) excitations.
Applications are presented for the the description of ground-state properties and collective excitations of medium and heavy nuclei.
The extension to hypernuclei will also be presented, showing a new interpretation of the Λ-nucleus spin-orbit potential.
Work supported by MIUR and INFN (Italy) and BMBF, GSI and DFG Cluster of Excellence "Origin and Structure of the Universe" (Germany).