th / 0 21 20 64 v 2 1 0 Ju n 20 03 Medium modifications of kaons in pion matter

- th / 0 21 20 64 v 1 1 6 D ec 2 00 2 Self energy of kaons in pion matter

The modifications of kaon properties in pion matter are investigated. In isotopically symmetric pionic matter the kaon mass (energy) does not change in lowest order chiral perturbation theory which describes the interaction between pseudoscalar mesons. At non-vanishing isovector densities the in-medium corrections to the kaon mass are found to be quite small, i.e. less than three MeV. However, ...

ar X iv : n uc l - th / 0 41 00 65 v 2 1 0 Fe b 20 06 D mesons and charmonium states in hot pion matter

We calculate the in-medium D meson self-energies in a hot pion gas induced by resonance interactions with pions. The appropriate resonances in the s, p and d waves of the D meson-pion pair are represented by low lying scalar, vector and tensor D∗ mesons. At temperatures around 200 MeV the D-meson mass drops by 30 MeV and the scattering width grows up to 60 MeV. Similar medium effects are found ...

th / 0 30 90 61 v 1 2 3 Se p 20 03 Single - spin asymmetries of d ( γ , π ) NN in the first resonance region

Incoherent photoproduction of pions on the deuteron in the first resonance region is investigated with special emphasis on single-spin asymmetries. For the elementary pion production operator an effective Lagrangian model which includes the standard pseudovector Born terms and a resonance contribution from the ∆(1232)-excitation is used. Single-spin asymmetries, both for charged and neutral pio...

ar X iv : n uc l - th / 0 30 70 01 v 1 3 0 Ju n 20 03 - 1 - CORRELATION BETWEEN THE DEUTERON CHARACTERISTICS AND THE LOW - ENERGY TRIPLET np SCATTERING PARAMETERS

- th / 0 60 30 03 v 2 1 S ep 2 00 6 Low - energy pions in nuclear matter and ππ photoproduction within a BUU transport model

A description of low-energy scattering of pions and nuclei within a BUU transport model is presented. Implementing different scenarios of medium modifications, the mean free path of pions in nuclear matter at low momenta and pion absorption reactions on nuclei have been studied and compared to data and to results obtained via quantum mechanical scattering theory. We show that even in a regime o...