Jun 5 – 9, 2023
Genova, Italy
Europe/Rome timezone

Interpretation of the $\Omega_c$ decay into $\pi^+ \bar{K} \Xi$ from the $\Omega(2012)$ molecular perspective

Jun 5, 2023, 2:52 PM
DAD - Room 1B (Genova, Italy)

DAD - Room 1B

Genova, Italy

Contributed Heavy baryon spectroscopy Heavy baryon spectroscopy


Natsumi Ikeno


We study a mechanism for $\Omega_c \to \pi^+ \Omega(2012)$ production through an external emission Cabibbo favored weak decay mode, where the $\Omega(2012)$ is dynamically generated from the interaction of $\bar{K}\Xi^*(1530)$, $\eta\Omega$, with $\bar{K}\Xi$ as the main decay channel. The $\Omega(2012)$ decays latter to $\bar{K}\Xi$ in this picture, with results compatible with Belle data. The picture has as a consequence that one can evaluate the direct decay $\Omega_c^0 \to \pi^+K^- \Xi^0$ and the decay $\Omega_c^0 \to \pi^+\bar{K} \Xi^*$, $\pi^+\eta\Omega$ with direct coupling of $\bar{K}\Xi^*$ and $\eta\Omega$ to $K^- \Xi^0$. We show that, within uncertainties and using data from a recent Belle measurement, all these three channels account for about (12-20)\% of the total $\Omega_c \to \pi^+K^- \Xi^0$ decay rate. The consistency of the molecular picture with all the data is established by showing that $\Omega_c \to \Xi^0 \bar{K}^{*0} \to \Xi^0K^- \pi^+$ together with $\Omega_c \to \pi^+ \Omega^* \to \pi^+K^- \Xi^0 $ account for about 85\% of the total $\Omega_c \to \pi^+K^- \Xi^0 $. I will give a presentation based on Refs. [1]-[3].

[1] N. Ikeno, W. H. Liang, G. Toledo, and E. Oset, Phys. Rev. D 106, 034022 (2022).
[2] R. Pavao and E. Oset, Eur. Phys. J. C 78, 857 (2018).
[3] N. Ikeno, G. Toledo, and E. Oset, Phys. Rev. D 101, 094016 (2020).

Primary authors

Natsumi Ikeno GENARO TOLEDO (UNIVERSIDAD NACIONAL AUTONOMA DE MEXICO) Wei-Hong Liang Eulogio Oset (IFIC, CSIC University of valencia)

Presentation materials