Absolute determination of $\Lambda_{c} and D_{s}$ branching ratios

In this paper we focus on two aspects of charm production in neutrino interactions: low-multiplicity processes such as the diffractive D//s and the quasi-elastic charmed-baryon production. We shall show that these processes allow a clear identification of the charmed hadron, and therefore a very good estimate of absolute decay branching ratios. Together with low systematic errors, these measurements can provide, for instance, a precise measurement of f//D//s.