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HK: Fachverband Physik der Hadronen und Kerne

HK 10: Kern- und Teilchen-Astrophysik

HK 10.4: Gruppenbericht

Montag, 10. März 2008, 17:30–18:00, 2B

Transport approach to the reconstruction of the neutrino kinematics in current oscillation experiments — •Tina Leitner¹, Oliver Buss¹, Ulrich Mosel¹, and Luis Alvarez-Ruso² — ¹Institut für Theoretische Physik, Universität Gießen — ²Departamento de Física Teórica and IFIC, Universidad de Valencia - CSIC, Spain

Neutrino oscillation results depend on the neutrino energy - a quantity which can not be measured directly but has to be reconstructed from the hadronic debris coming out of the neutrino-nucleus reaction inside the detector. A reliable reconstruction of the neutrino kinematics and the initial scattering process has to account for in-medium modifications and, in particular, for final state interactions inside the target nucleus. They can, e.g. through intranuclear rescattering, change particle multiplicities and also redistribute their energy. Those effects can be simulated with our fully coupled channel GiBUU transport model where the neutrino first interacts with a bound nucleon producing secondary particles which are then transported out of the nucleus. We use a relativistic formalism that incorporates recent form factor parametrizations, and apply, besides Fermi motion, full in-medium kinematics, mean-field potentials and in-medium spectral functions. In this talk, we compare the reconstructed quantities obtained within our framework to the ones obtained by the current experiments, which, as e.g. MiniBooNE, mostly rely on simple two-body kinematics. We then discuss how these uncertainties influence not only the cross section measurements but also the oscillation results. Supported by DFG.