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research
Revisiting the
Ω
(
2012
)
\Omega(2012)
Ω
(
2012
)
as a hadronic molecule and its strong decays
Authors
Li-Sheng Geng
Jun-Xu Lu
+3Â more
En Wang
Ju-Jun Xie
Chun-Hua Zeng
Publication date
6 May 2020
Publisher
'Springer Science and Business Media LLC'
Doi
Cite
View
on
arXiv
Abstract
Recently, the Belle collaboration measured the ratios of the branching fractions of the newly observed
Ω
(
2012
)
\Omega(2012)
Ω
(
2012
)
excited state. They did not observe significant signals for the
Ω
(
2012
)
→
K
ˉ
Ξ
∗
(
1530
)
→
K
ˉ
Ï€
Ξ
\Omega(2012) \to \bar{K} \Xi^*(1530) \to \bar{K} \pi \Xi
Ω
(
2012
)
→
K
ˉ
Ξ
∗
(
1530
)
→
K
ˉ
Ï€
Ξ
decay, and reported an upper limit for the ratio of the three body decay to the two body decay mode of
Ω
(
2012
)
→
K
ˉ
Ξ
\Omega(2012) \to \bar{K} \Xi
Ω
(
2012
)
→
K
ˉ
Ξ
. In this work, we revisit the newly observed
Ω
(
2012
)
\Omega(2012)
Ω
(
2012
)
from the molecular perspective where this resonance appears to be a dynamically generated state with spin-parity
3
/
2
−
3/2^-
3/
2
−
from the coupled channels interactions of the
K
ˉ
Ξ
∗
(
1530
)
\bar{K} \Xi^*(1530)
K
ˉ
Ξ
∗
(
1530
)
and
η
Ω
\eta \Omega
η
Ω
in
s
s
s
-wave and
K
ˉ
Ξ
\bar{K} \Xi
K
ˉ
Ξ
in
d
d
d
-wave. With the model parameters for the
d
d
d
-wave interaction, we show that the ratio of these decay fractions reported recently by the Belle collaboration can be easily accommodated.Comment: Published version. Published in Eur.\ Phys.\ J.\ C {\bf 80}, 361 (2020
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Last time updated on 28/11/2020