Dr Luis Alvarez-Ruso (Universidad de Murcia)
Charged-current neutrino interactions with carbon nuclei at the typical energies of the MiniBooNE experiment (around 700 MeV) have been investigated. We describe the nucleus as a local Fermi gas of nucleons in a density- and momentum-dependent mean field potential, taking into account nucleon in-medium spectral functions. Polarization effects are included by means of an RPA resumation of particle-hole and Delta-hole states; they cause a considerable reduction of the cross section at low q2. With the same physics input and using the transport techniques of the Giessen BUU model we also obtain the non-CCQE part of the cross section that arises mainly from pion production followed by absorption inside the nucleus. Our CCQE results are compared with the modified Fermi gas ansatz proposed by MiniBooNE as a good fit. Finally, we have investigated how the many body effects present in our description affect the neutrino energy reconstruction.