Berlin 2005 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 37: Elektromagnetische und Hadronische Proben

HK 37.5: Talk

Wednesday, March 9, 2005, 15:00–15:15, TU MA001

Neutrino Scattering on Nucleons and Nuclei — •Tina Leitner, André Peshier und Ulrich Mosel — Institut für Theoretische Physik, Universität Giessen, Germany

We investigate neutrino scattering on nucleons and nuclei for neutrino energies up to 2 GeV. The two main processes in this energy region are quasielastic scattering and resonance production. Here we concentrate on processes mediated by charged current weak interactions. Quasielastic reactions on nucleons (ν + n → l⁻ + p and ν + p → l⁺ + n) can be related to electron scattering. Using recent electron scattering data for the parametrization of the vector form factors leads to a more reliable prediction of the neutrino cross section and of the other form factors which contain information on the axial content of the nucleon. Extensions to neutrino reactions on nuclei are calculated in the framework of the BUU transport model [1]. Resonance production is also first calculated for the nucleon and then within the BUU transport model to simulate nuclear effects. The main contribution to the single-pion production cross section at neutrino energies of a few GeV comes from the production and the subsequent decay of the Δ(1232), but also other low-energy resonances give non-negligible contributions e. g. the N(1440).

[1] M. Effenberger, E. Bratkovskaya and U. Mosel, Phys. Rev. C 60, 044614 (1999)