Production and sequential decays of charmed hyperons

Abstract

We investigate production and decay of the ${\Lambda }_c^{+}$ hyperon. The production considered is through the $e^{+}{e}^{-}$ annihilation channel, $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$, with summation over the ${\bar{\Lambda }}_c^{-}$ anti-hyperon spin directions. It is in this situation that the ${\Lambda }_c^{+}$ decay chain is identified. Two kinds of sequential decays are studied. The first one is the doubly weak decay $B_1\to B_2{M}_2$, followed by $B_2\to B_3{M}_3$. The other one is the mixed weak-electromagnetic decay $B_1\to B_2{M}_2$, followed by $B_2\to B_3\gamma$. In both schemes $B$ denotes baryons and $M$ mesons. We should also mention that the initial state of the ${\Lambda }_c^{+}$ hyperon is polarized.

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