Extended Skyrme interaction (I): spin fluctuations in dense matter

Details Extended Skyrme interaction (I): spin fluctuations in dense matter Extended Skyrme interaction (I): spin fluctuations in dense matter

2009-05-12

arxiv.org/abs/0905.1931v2

Physics

Nuclear Physics

Nuclear Theory

6 pages, 5 Figs., 2 Tabs

Scientific paper

Most of the Skyrme interactions are known to predict spin or isospin instabilities beyond the saturation density of nuclear matter which contradict predictions based on realistic interactions. A modification of the standard Skyrme interaction is proposed so that the ferromagnetic instability is removed. The new terms are density dependent and modify only the spin p-h interaction in the case of spin-saturated system. Consequences for the nuclear response function and neutrino mean free path are shown. The overall effect of the RPA correlations makes dense matter more transparent for neutrino propagation by a factor of 2 to 10 depending of the density.

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