Abstract
In this work, we study strong and radiative decays of S-wave D\Xi molecular state, which is related to the \Omega^*_c states newly observed at LHCb. The coupling between the D\Xi molecular state and its constituents D and \Xi is calculated by using the compositeness condition. With the obtained coupling, the partial decay widths of the D\Xi molecular state into the \Xi_c^{+}K^{-}, \Xi^{'+}_cK^{-} and \Omega^{*}_c(2695)\gamma final states through hadronic loop are calculated with the help of the effective Lagrangians. By comparison with the LHCb observation, the current results of total decay width support the \Omega^{*}_c(3119) or \Omega^{*}_c(3050) as D\Xi molecule while the the decay width of the \Omega^{*}_c(3000), \Omega^{*}_c(3066) and \Omega^{*}_c(3090) can not be well reproduced in the molecular state picture. The partial decay widths are also presented and helpful to further understand the internal structures of \Omega^{*}_c(3119) and \Omega^{*}_c(3050).
Highlights
For a long time, little is known about the charmed baryon Ωc with quantum numbers C 1⁄4 1 and S 1⁄4 −2, which is composed of one charm quark and two strange quark in the conventional constituent quark model
We study strong and radiative decays of S-wave DΞ molecular state, which is related to the ΩÃc states newly observed at LHCb
The ground state ΩÃcð2695Þ and ΩÃcð2770Þ are listed in the newest version of the Review of Particle Physics (PDG) [1]
Summary
Little is known about the charmed baryon Ωc with quantum numbers C 1⁄4 1 and S 1⁄4 −2, which is composed of one charm quark and two strange quark in the conventional constituent quark model. The LHCb observation stimulated a large amount of the theoretical studies about the new ΩÃc states with different assumptions of their internal structures. The nature of the observed ΩÃc baryons remains unclear In addition to their masses, the decay property serves as an important way to unveil the nature of hadrons. [10] the authors studied the decay patterns of the ΩÃc baryons in a chiral quark model in threequark picture and suggested that most of the low-lying ΩÃc baryons have masses in the vicinity of the Ξþc K− and Ξ0cþK− thresholds, to which the strong decay will almost saturate their total decay widths. The decays of the ΩÃc baryons, which are helpful to understand their internal structures, have not been studied in the molecular state picture. We give discussion and summary in the last section
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
