Author:
Wang Xiao-Yun,Cai Zu-Xin,Li Gang,Liu Shi-Dong,An Chun-Sheng,Xie Ju-Jun
Abstract
AbstractWe investigate the production of $$X_b$$
X
b
in the process $$\Upsilon (5S,6S)\rightarrow \gamma X_b$$
Υ
(
5
S
,
6
S
)
→
γ
X
b
, where $$X_b$$
X
b
is assumed to be a $$B {\bar{B}}^*$$
B
B
¯
∗
molecular state. Two kinds of meson loops of $$B^{(*)}{\bar{B}}^{(*)}$$
B
(
∗
)
B
¯
(
∗
)
and $$B_1^{\prime }{\bar{B}}^{(*)}$$
B
1
′
B
¯
(
∗
)
were considered. To explore the rescattering mechanism, we calculated the relevant branching ratios using the effective Lagrangian based on the heavy quark symmetry. The branching ratios for the $$\Upsilon (5S,6S) \rightarrow \gamma X_b$$
Υ
(
5
S
,
6
S
)
→
γ
X
b
were found to be at the orders of $$10^{-7} \sim 10^{-6}$$
10
-
7
∼
10
-
6
. Such sizeable branching ratios might be accessible at BelleII, which would provide important clues to the inner structures of the exotic state $$X_b$$
X
b
.
Funder
National Natural Science Foundation of China
Youth Innovation Promotion Association of the Chinese Academy of Sciences
Chongqing Natural Science Foundation under Project
Natural Science Foundation of Shandong Province
Higher Educational Youth Innovation Science and Technology Program Shandong Province
Taishan Scholar Project of Shandong Province
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
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