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Abstract: We present our description of neutrino induced charged current quasielasticscattering CCQE in nuclei at energies relevant for the MiniBooNE experiment.In our framework, the nucleons, with initial momentum distributions accordingto the Local Fermi Gas model, move in a density- and momentum-dependent meanfield potential. The broadening of the outgoing nucleons due to nucleon-nucleoninteractions is taken into account by spectral functions. Long range RPAcorrelations renormalizing the electroweak strength in the medium are alsoincorporated. The background from resonance excitation events that do not leadto pions in the final state is also predicted by propagating the outgoinghadrons with the Giessen semiclassical BUU model in coupled channels GiBUU.We achieve a good description of the shape of the CCQE Q2 distributionextracted from data by MiniBooNE, thanks to the inclusion of RPA correlations,but underestimate the integrated cross section when the standard value of MA =1 GeV is used. Possible reasons for this mismatch are discussed.

Autor: L. Alvarez-Ruso, O. Buss, T. Leitner, U. Mosel

Fuente: https://arxiv.org/

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