Production and sequential decays of charmed hyperons

TL;DR

This paper studies the production of polarized $\Lambda_c^+ ext{ extquoteright} $ hyperons in electron-positron collisions and analyzes their decay chains involving weak and electromagnetic processes.

Contribution

It provides a detailed analysis of the decay sequences of polarized $\Lambda_c^+ ext{ extquoteright} $ hyperons, including both weak and mixed weak-electromagnetic decays, in $e^+e^-$ annihilation.

Findings

Characterization of decay chains involving weak and electromagnetic processes.

Analysis of polarization effects in hyperon production.

Insights into the decay mechanisms of charmed hyperons.

Abstract

We investigate production and decay of the $\Lambda_c^+ $ hyperon. The production considered is through the $e^+e^-$ annihilation channel, $e^+e^-\rightarrow\Lambda_c^+ \bar{\Lambda}_c^-$, 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 $B_1\rightarrow B_2 M_2$, followed by $B_2 \rightarrow B_3 M_3$. The other one is the mixed weak-electromagnetic decay $B_1\rightarrow B_2 M_2$, followed by $B_2 \rightarrow B_3 \gamma$. In both schemes $B$ denotes baryons and $M$ mesons. We should also mention that the initial state of the $\Lambda_c^+ $ hyperon is polarized.