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HK: Hadronen und Kerne
HK 54: Structure of Baryons, Mesons VII, Theory
HK 54.3: Group Report
Wednesday, March 18, 1998, 15:00–15:30, H
Bound η- and ω-states in nuclei — •Thomas Waas, Frank Klingl, and Wolfram Weise — Technische Universität München, Physik Department T39
Following previous investigations of deeply bound pionic states in nuclei,
we develop realistic potentials for the η- and ω-mesons in nuclear
matter based on a chiral SU(3) effective Lagrangian. We find in both cases an attractive interaction which leads to bound
states of these mesons in nuclei. Using a Green’s function approach we
investigate the possibility of detecting these bound states in the A(d,3 He)
pick-up reaction. The dependence on the incoming beam energy and the target
nuclei A is discussed. We also comment on the option of producing such states
with a pion beam. The role of the in-medium width of the η- and
ω-mesons will be examined in this context.
Work supported in part by GSI and BMBF