Kaon properties and cross sections in the nuclear medium

Abstract

Abstract. Results for the π + N → Λ, Σ + K reactions in nuclear matter of Ref.[1] are presented. To evaluate the in-medium modification of the reaction amplitude as a function of the baryonic density we introduce relativistic, meanfield potentials for the initial, final and intermediate mesonic and baryonic states in the resonance model. These vector and scalar potentials were calculated using the quark meson coupling model. Contrary to earlier work which has not allowed for the change of the cross section in medium, we find that the data for kaon production at SIS energies are consistent with a repulsive K + -nucleus potential.

Effects of neutrino magnetic moment and charge radius constraints and medium modifications of the nucleon form factors on the neutrino mean free path in dense matter

“…Some details of the applications can be found, for example, in Refs. [89][90][91][92][93][94][95][96][97]. In the earlier works of neutrino-nucleus interaction [98,99], the in-medium modifications of only the nucleon weak form factors were applied, but both effects of the in-medium weak and EM form factors were studied in Refs.…”

Nuclear transparency and effective kaon-nucleon cross section from theA(e,e′K+)reaction

“…This could be an indication that these results cannot all be explained simultaneously in terms of traditional nuclearphysics effects, however, the relatively large experimental uncertainties and the lack of energy dependence in the nuclear transparency do not allow strong conclusions. It would be of great interest to also extend a recent calculation of kaon production data in heavy-ion collisions, going beyond the conventional meson-nucleon nuclear many-body calculations in the framework of the quark-meson coupling model [27], to these results.…”

“…Similar to what was found for the K + -scattering experiments, the comparison between the heavy-ion collision data and calculations [26] indicates that the calculations substantially underestimate the experimental data. Recently, a calculation in the framework of the quark-meson coupling model [27], which goes beyond the conventional mesonnucleon nuclear many-body framework, was able to describe these kaon production data in heavy-ion collisions.…”

J/Ψsuppression in colliding nuclei: Statistical model analysis

“…We would like to add also at this point that the charmonium − hadron inelastic cross-sections have been considered as constant quantities here. For sure, they should not be constant and the results of just mentioned papers [45,46] suggests that they are not, indeed. They are growing functions of the invariant collision energy √ s. So, the naive reasoning should direct us to the conclusion that the increase of ǫ 0 (or in other words E T ) causes the increase of the invariant collision energy √ s on the average and further the increase of the charmonium − hadron inelastic cross-sections.…”