Speaker
Description
In this presentation, we compute the charged current (CC) cross section
of the background processes $\nu_{\mu}(\bar{\nu}_{\mu})A\rightarrow\mu^{-(+)}+(A-1)N'\pi$
which are involved in the measurement of the oscillation probability
$P(\nu_{\mu}\rightarrow\nu_{e})$, and the CP-mirror $\bar{\nu}_{\mu}\rightarrow\bar{\nu_{e}}$
one. We develop a model that takes into account: binding effects,
nucleon smearing, and final state interactions (FSI) between nucleons-pions
and the residual nucleus. It was also suitable in describing the quasielastic
channel as $\nu_{\mu}(\bar{\nu}_{\mu})A\rightarrow\mu^{-(+)}(A-1)N'$,
keeping covariance, gauge invariance and partially unitarity. Our
calculations are compared with other dynamical models that have introduced
the \ensuremath{\Delta}(1232) resonance but inconsistently, and contrasted
with experimental actual data.
