paper

Charmed baryon decays at BESIII

arXiv:2604.14716

Abstract

BESIII has accumulated 4.5 fb $^{- 1}$ of $e^{+} e^{-}$ collision data in the 4.6 to 4.7 GeV energy range, corresponding to the world's largest sample of $I^_{c}^{+} I^ˉ _{c}^{-}$ pairs. This paper summarizes recent BESIII results on charmed-baryon decays, including the observation of the rare semi-leptonic decay $I^_{c}^{+} \to n e^{+} I^½_{e}$ using a Graph Neural Network, the first measurement of the decay asymmetry in the pure $W$ -exchange decay $I^_{c}^{+} \to I^^{0} K^{+}$ , and branching fraction measurements of the inclusive decays $I^_{c}^{+} \to X e^{+} I^½_{e}$ and $I^ˉ _{c}^{-} \to n ˉ X$ . We also report partial wave analyses of $I^_{c}^{+} \to I^ I ¨ ^{+} I ¨ ^{0}$ and $I^_{c}^{+} \to I^ I ¨ ^{+} I^\cdot$ , measurements of Cabibbo-suppressed decays such as $I^_{c}^{+} \to p I ¨ ^{0}$ , and studies of $K_{S}^{0} - K_{L}^{0}$ asymmetries in $I^_{c}^{+}$ decays.

5 pages, 4 figures, proceedings for Baryons 2025 conference