Speaker
Xudong Yu
(Peking University)
Description
Based on $4.4 fb^{-1}$ of $e^+e^-$ annihilation data collected in the energy region between $4.6~\rm GeV$ and $4.7~\rm GeV$ with the BESIII detector at the BEPCII collider, we search for semi-leptonic decays $\Lambda_c^+ \to \Lambda \pi^+ \pi^- e^+ \nu_e$ and $\Lambda_c^+ \to p K_S \pi^- e^+ \nu_e$, using double tag technique. The measurement of $\Lambda_c^+ \to \Lambda^* e^+ \nu_e$ is important for validating different theoretical-model calculations and helping us understand the nature of $\Lambda^*$ baryon resonances. Since there is no significant signal on data, we set upper limits on branching fractions at 90% confidence level. This analysis will enhance our knowledges of charmed baryon decays.
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Primary author
Xudong Yu
(Peking University)
