Author:
Zhong Hui-Hua,Ni Ru-Hui,Chen Mu-Yang,Zhong Xian-Hui,Xie Ju-Jun
Abstract
Abstract
In our previous studies, we analyzed the two-body strong decays of the low-lying Ω baryon states within a chiral quark model. The results showed that the mass, total width, and two body decay
could be well reproduced with the spin-parity
state
classified in the quark model. Stimulated by the new observations of the three-body decay process
at Belle, in the present study, we further investigate the three-body strong decay
within the chiral quark model. It is found that the
has a sizeable decay rate into the three-body final states
. When considering
as the
resonance, the predicted ratio
is close to the upper limit
measured by the Belle Collaboration in 2019; however, it is too small to be comparable to the recent measurement
. In addition, the coupled-channel effects on the bare three-quark state
from nearby channels
,
, and
are studied. Our theoretical results show that the coupled-channel effects on
are not very large, and the molecular component is no more than
. To clarify the nature of
resonance, precise measurements on the ratio
are needed, and further investigation on the effects of coupled channels is recommended.
Funder
National Natural Science Foundation of China
Youth Innovation Promotion Association of the Chinese Academy of Sciences
Subject
Astronomy and Astrophysics,Instrumentation,Nuclear and High Energy Physics