Precise quasielastic neutrino/nucleon cross section

Abstract

Quasielastic antineutrino/proton and neutrino/neutron scatterings can be well approximated by simple formulae, valid around MeV or GeV energies. We obtain a single expression valid in the whole range, and discuss its relevance for studies of supernova neutrinos, which reach intermediate energies.

Comments: 12 pages. Version 2: comparison with various approximations expanded. To appear on Phys. Lett. B