DPG Phi
Verhandlungen
Verhandlungen
DPG

Bochum 1998 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

HK: Hadronen und Kerne

HK 54: Structure of Baryons, Mesons VII, Theory

HK 54.2: Group Report

Wednesday, March 18, 1998, 14:30–15:00, H

Modification of the φ-meson spectrum in nuclear matter — •Frank Klingl, Thomas Waas, and Wolfram Weise — Technische Universität München, Physik Department T39

The vacuum spectrum of the φ-meson is characterized by its decay into KK . Modifications of the K K-loops in baryonic matter change this spectrum. We calculate these in-medium modifications taking both s- and p-wave kaon-nucleon interactions into account. We use results of the in-medium K and K spectra determined previously from a coupled channel approach based on a chiral effective Lagrangian. Altogether we find a very small shift of the φ meson mass, by less than 10 MeV at normal nuclear matter density ρ0. The in-medium decay width of the φ meson increases such that its life time at ρ=ρ0 is reduced to less than 5 fm/c. It should therefore be possible to observe medium effects in reactions such as π p → φ n in heavy nuclei, where the φ meson can be produced with small momentum.

Work supported in part by GSI and BMBF

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 1998 > Bochum