[Triumf-seminars] TRIUMF Theory Seminar today at 13:00

[TRIUMF Seminars]

Date/Time: Tue 2016-05-17 at 13:00

Location:  Theory Room         

Speaker:   Noemi Rocco (INFN Rome)

Title:     Two-body current contributions in electron-Carbon scattering within the Spectral Function formalism

Abstract: Precise measurements of neutrino oscillations, and hence the determination of their masses, is one of the most exciting challenges of particle physics and requires a quantitative understanding of neutrino-nucleus interactions. Experimental studies of neutrino-nucleus interactions carried out over the past decade have provided ample evidence of the inadequacy of the relativistic Fermi gas model, routinely employed in event generators.
The formalism based on spectral function and factorization of the nuclear transition matrix elements allows to combine a fully relativistic description of the interaction vertex with an accurate treatment of nuclear dynamics, in which the effect of nucleon nucleon correlations is properly taken into account. This approach has been recently generalized to treat transition matrix elements involving two-nucleon currents, whose contribution to the nuclear electromagnetic response in the transverse channel is known to be significant. I will discuss the results of calculations of the inclusive electron-Carbon cross section and transverse response, showing that the inclusion of processes involving two-nucleon currents appreciably improves the agreement between theory and data in the dip region, between the quasi elastic and delta-production peaks. The implications for the analysis of flux-integrated neutrino-nucleus cross sections will be discussed.



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