The in-medium modification to the neutrino-nucleon scattering rate is
calculated in the relativistic random phase approximation in the framework of a
hadronic meson exchange model, in view of applications to neutrino transport in
supernovae and protoneutron starsComment: 4 pages, 2 figures, to appear in the Proceedings of the PANIC02
conference, 30 sept - 4 oct 2002, Osaka, Japa