Weak production of strange and charm ground-state baryons in nuclei

Understand

We present results for the quasi-elastic weak production of $\Lambda$ and $\Sigma$ hyperons induced by $\bar{\nu}$ scattering off nuclei, in the kinematical region of interest for accelerator neutrino experiments.

• We employ realistic hole spectral functions and we describe the propagation of the hyperons in the nuclear medium by means of a Monte Carlo cascade.
• The latter strongly modifies the kinematics and the relative production rates of the hyperons, leading to a non-vanishing $\Sigma^+$ cross section, to a sizable enhancement of the $\Lambda$ production and to a drastic reduction of the $\Sigma^0$ and $\Sigma^-$ distributions.
• We also compute the quasi-elastic weak $\Lambda_c$ production cross section, paying special attention to estimate the uncertainties induced by the model dependence of the vacuum $n\to \Lambda_c$ weak matrix element.