Measurements of branching fractions and asymmetry parameters of Ξc0→ΛK¯∗0, Ξc0→Σ0K¯∗0, and Ξc0→Σ+K∗− decays at Belle
A bstract Using a data sample of 980 fb − 1 collected with the Belle detector at the KEKB asymmetric-energy e + e − collider, we study the processes of Ξ c 0 → Λ K ¯ ∗ 0 , Ξ c 0 → Σ 0 K ¯ ∗ 0 , and Ξ c 0 → Σ + K ∗ − for the first time. The relative branching ratios to the normalization mode of Ξ c 0...
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Veröffentlicht in: | The journal of high energy physics 2021-06, Vol.2021 (6) |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A
bstract
Using a data sample of 980 fb
−
1
collected with the Belle detector at the KEKB asymmetric-energy
e
+
e
−
collider, we study the processes of
Ξ
c
0
→
Λ
K
¯
∗
0
,
Ξ
c
0
→
Σ
0
K
¯
∗
0
, and
Ξ
c
0
→
Σ
+
K
∗
−
for the first time. The relative branching ratios to the normalization mode of
Ξ
c
0
→
Ξ
−
π
+
are measured to be
B
Ξ
c
0
→
Λ
K
¯
∗
0
/
B
Ξ
c
0
→
Ξ
−
π
+
=
0.18
±
0.02
stat
.
±
0.01
syst
.
,
B
Ξ
c
0
→
Σ
0
K
¯
∗
0
/
B
Ξ
c
0
→
Ξ
−
π
+
=
0.69
±
0.03
stat
.
±
0.03
syst
.
,
B
Ξ
c
0
→
Σ
+
K
∗
−
/
B
Ξ
c
0
→
Ξ
−
π
+
=
0.34
±
0.06
stat
.
±
0.02
syst
.
,
where the uncertainties are statistical and systematic, respectively. We obtain
B
Ξ
c
0
→
Λ
K
¯
∗
0
=
3.3
±
0.3
stat
.
±
0.2
syst
.
±
1.0
ref
.
×
10
−
3
,
B
Ξ
c
0
→
Σ
0
K
¯
∗
0
=
12.4
±
0.5
stat
.
±
0.5
syst
.
±
3.6
ref
.
×
10
−
3
,
B
Ξ
c
0
→
Σ
+
K
∗
0
=
6.1
±
1.0
stat
.
±
0.4
syst
.
±
1.8
ref
.
×
10
−
3
,
where the uncertainties are statistical, systematic, and from
B
Ξ
c
0
→
Ξ
−
π
+
, respectively. The asymmetry parameters
α
Ξ
c
0
→
Λ
K
¯
∗
0
and
α
Ξ
c
0
→
Σ
+
K
∗
−
are 0
.
15 ± 0
.
22(stat
.
) ± 0
.
04(syst
.
) and
−
0
.
52 ± 0
.
30(stat
.
) ± 0
.
02(syst
.
), respectively, where the uncertainties are statistical followed by systematic. |
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ISSN: | 1029-8479 |
DOI: | 10.1007/JHEP06(2021)160 |