München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 56: Elektromagnetische und Hadronische Sonden

HK 56.1: Gruppenbericht

Freitag, 24. März 2006, 14:00–14:30, F

Neutrino Interactions with Nucleons and Nuclei — •Tina Leitner, Luis Alvarez-Ruso und Ulrich Mosel — Institut für Theoretische Physik, Universität Giessen, Germany

We have developed a model to describe the interactions of neutrinos with nucleons and nuclei via charged and neutral currents in the energy range up to about 2 GeV. The elementary ν N reaction is then dominated by quasielastic scattering and Δ (1232) production.

For neutrino nucleon collisions we use a fully relativistic formalism which incorporates state-of-the-art parameterizations of the form factors for both the nucleon and the N−Δ transition.

The model has then been extended to finite nuclei, taking into account nuclear effects such as Fermi motion, Pauli blocking (both within the local density approximation) and nuclear binding in a density and momentum dependent mean field potential. The in-medium modification of the Δ resonance due to Pauli blocking and collisional broadening has also been included. Final state interactions are implemented by means of the Boltzmann-Uehling-Uhlenbeck (BUU) coupled-channel transport model; they lead to absorption, charge exchange, a redistribution of energy and the production of new particles.

We have investigated inclusive as well as exclusive channels as pion production and nucleon knockout and have found that in-medium effects in ν A scattering, and in particular final state interactions, are not negligible. Our results show that the understanding of those effects are crucial for current and future neutrino experiments.
Supported by DFG.