Gießen 2007 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 29: Elektromagnetische und Hadronische Sonden
HK 29.7: Vortrag
Mittwoch, 14. März 2007, 15:45–16:00, A
Neutrino induced pion production and nucleon knockout within the GiBUU transport model — •Tina Leitner1, Luis Alvarez-Ruso2, and Ulrich Mosel1 — 1Institut für Theoretische Physik, Universität Giessen, Germany — 2Universidad de Valencia, Spain
There is an extensive experimental effort aiming at the precise determination of neutrino oscillation parameters. Its success depends critically on a good knowledge of neutrino-nucleus interactions in order to minimize the systematic uncertainties in neutrino fluxes, backgrounds and detector responses. We describe such charged and neutral current neutrino-nucleus interactions at intermediate neutrino energies within the Giessen Boltzmann-Uehling-Uhlenbeck (GiBUU) coupled-channel transport model. We account for in-medium effects such as Fermi motion, Pauli blocking, nuclear binding, and final-state interactions which allows us to study exclusive channels as pion production and nucleon knockout. We find that final-state interactions modify considerably the distributions through rescattering, charge-exchange and absorption. Side-feeding induced by charge-exchange scattering is important in both cases. In the case of pions, there is a strong absorption associated with the in-medium pionless decay modes of the Delta, while nucleon knockout exhibits a considerable enhancement of low energy nucleons due to rescattering. At neutrino energies above 1 GeV, we also obtain that the contribution to nucleon knockout from Delta excitation is comparable to that from quasielastic scattering.
Supported by DFG.