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T: Fachverband Teilchenphysik

T 21: Neutrinophysik (Theorie) I

T 21.2: Vortrag

Montag, 15. März 2010, 17:00–17:15, HG XV

One pion production in electron- and neutrino- scattering on nuclei — •Olga Lalakulich, Tina Leitner, Oliver Buss, and Ulrich Mosel — Institut für Theoretische Physik, Universität Giessen

The interest in one-pion production has recently been revived by the modern long-baseline experiments, searching for neutrino oscillations. Besides being important as an exclusive channel, pion production constitutes a noticeable background for other processes. A precise knowledge of the corresponding cross sections is a prerequisite for the proper interpretation of the experimental data.

We investigate one-pion production reactions, presenting the elementary lepton–nucleon interaction vertex as the sum of the leading Δ–pole diagram and several background diagrams calculated within the non-linear σ–model. This approach does not introduce any new adjustable parameters, which allows unambiguous predictions for the observables. The analysis is done for electro- (as a benchmark) and neutrino- production. The results obtained are compared with the experimental data for various differential cross sections, including muon-nucleon and muon-pion invariant-mass distributions. Neutrino interactions with nuclei are treated within the GiBUU transport model that takes into account various nuclear effects.

Work supported by DFG.