- th / 9 90 60 27 v 1 9 J un 1 99 9 Ground state energy fluctuations in nuclear matter II

- th / 9 90 60 19 v 1 8 J un 1 99 9 MKPH - T - 99 - 4 Medium Effects in Coherent Pion Photo - and Electroproduction on 4 He and 12

Coherent π0 photoand electroproduction on 4He and 12C nuclei is investigated in the framework of a distorted wave impulse approximation in momentum space. The elementary process is described by the recently developed unitary isobar model. Medium effects are considered by introducing a phenomenological ∆ self-energy. The recent experimental data for 4He and 12C can be well described over a wide ...

- th / 9 90 60 29 v 2 1 1 Ju l 1 99 9 1 Quark Matter ’ 99 — Theoretical Summary : What Next ?

ar X iv : n uc l - th / 9 90 60 29 v 3 1 5 Ju l 1 99 9 1 Quark Matter ’ 99 — Theoretical Summary : What Next ?

ar X iv : n uc l - th / 9 90 60 16 v 1 7 J un 1 99 9 The properties of K̄ in the nuclear medium

The self-energy of the K − meson in nuclear matter is calculated in a self-consistent microscopic approach, using a ¯ KN interaction obtained from the lowest-order meson-baryon chiral Lagrangian. The effective ¯ KN interaction in the medium is derived by solving the coupled-channel Bethe-Salpeter equation including Pauli blocking on the nucleons, mean-field binding potentials for the baryons an...

- th / 9 40 60 30 v 1 2 5 Ju n 19 94 SUNY - NTG 94 - 27 K − - proton scattering and the Λ ( 1405 ) in dense matter

The scattering of antikaons with nucleons is studied in the nuclear environment. Describing the Λ(1405) as a K− proton bound state, we find, that due to the Pauli blocking of intermediate states, the mass of the Λ(1405) is shifted upwards in energy, above the K− proton threshold and and its width is somewhat broadened. As a consequence the s-wave K−–nucleon scattering length turns attractive at...