Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1998-08-26
Phys.Rev. C60 (1999) 034610
Physics
Nuclear Physics
Nuclear Theory
19 pages, 3 figures, feynMF diagrams
Scientific paper
10.1103/PhysRevC.60.034610
Production of negative strangeness in reactions of inelastic anti-neutrino scattering on a nucleus provides information on the modification of strange degrees of freedom in nuclear matter. We calculate cross-sections of the reaction channels $\bar{\nu}_{e(\mu)}\to e^+(\mu^+) + K^{-}$ and $\bar{\nu}_{e(\mu)} + p \to \Lb + e^+(\mu^+)$ and investigate their sensitivity to the medium effects. In particular, we consider effects induced by the presence of a low-energy excitation mode in the $K^-$ spectrum, associated with the correlated $\Lambda$-particle and proton-hole states, and the renormalization of the weak interaction in medium. In order to avoid double counting, various contributions to anti-neutrino scattering are classified with the help of the optical theorem, formulated within the non-equilibrium Green's function technique.
Kolomeitsev Evgeni E.
Voskresensky Dmitri . N.
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