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research
The pure annihilation type decays
B
0
β
D
s
β
K
2
β
+
B^0\rightarrow D_{s}^{-}K_{2}^{*+}
B
0
β
D
s
β
β
K
2
β+
β
and
B
s
β
D
Λ
a
2
B_{s}\rightarrow \bar{D}a_{2}
B
s
β
β
D
Λ
a
2
β
in perturbative QCD approach
Authors
Aubert B (BABAR collaboration)
Buras A J
+6Β more
Cai-Dian LΓΌ
Du Dong-Sheng
Nakamura K (Particle Data Group)
Rui Zhou
Zhi-Tian Zou
Zou Hao
Publication date
14 April 2012
Publisher
'IOP Publishing'
Doi
Cite
View
on
arXiv
Abstract
We calculate the branching ratios of pure annihilation type decays
B
0
β
D
s
β
K
2
β
+
B^0\rightarrow D_{s}^{-}K_{2}^{*+}
B
0
β
D
s
β
β
K
2
β+
β
and
B
s
β
D
Λ
a
2
B_s\rightarrow \bar{D}a_{2}
B
s
β
β
D
Λ
a
2
β
using the perturbative QCD approach based on
k
T
k_T
k
T
β
factorization. The branching ratios are predicted to be
(
60.
6
β
16.5
β
β
10.4
β
β
2.1
+
17.3
β
+
4.3
β
+
3.2
)
Γ
1
0
β
6
(60.6_{-16.5\,-10.4\,-2.1}^{+17.3\,+4.3\,+3.2}) \times 10^{-6}
(
60.
6
β
16.5
β
10.4
β
2.1
+
17.3
+
4.3
+
3.2
β
)
Γ
1
0
β
6
for
B
0
β
D
s
β
K
2
β
+
B^0\rightarrow D_{s}^{-}K_{2}^{*+}
B
0
β
D
s
β
β
K
2
β+
β
,
(
1.
1
β
0.4
β
β
0.2
β
β
0.1
+
0.4
β
+
0.1
β
+
0.1
)
Γ
1
0
β
6
(1.1_{-0.4\,-0.2\,-0.1}^{+0.4\,+0.1\,+0.1})\times 10^{-6}
(
1.
1
β
0.4
β
0.2
β
0.1
+
0.4
+
0.1
+
0.1
β
)
Γ
1
0
β
6
for
B
s
β
D
Λ
a
2
0
B_s\rightarrow \bar{D}a_{2}^{0}
B
s
β
β
D
Λ
a
2
0
β
and
(
2.
3
β
0.8
β
β
0.4
β
β
0.1
+
0.8
β
+
0.2
β
+
0.1
)
Γ
1
0
β
6
(2.3_{-0.8\,-0.4\,-0.1}^{+0.8\,+0.2\,+0.1})\times 10^{-6}
(
2.
3
β
0.8
β
0.4
β
0.1
+
0.8
+
0.2
+
0.1
β
)
Γ
1
0
β
6
for
B
s
β
D
β
a
2
+
B_{s}\rightarrow D^{-}a_{2}^{+}
B
s
β
β
D
β
a
2
+
β
. They are large enough to be measured in the ongoing experiment. Due to the shortage of contributions from penguin operators, there are no direct CP asymmetries for these decays in the standard model. We also derive simple relations among these decay channels to reduce theoretical uncertainties for the experiments to test the accuracy of theory and search of new physics signal.Comment: 9pages, 1 figur
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Last time updated on 03/01/2020