Evidence for the decays B0 → 𝐷(*)0 ϕ and updated measurements of the branching fractions of the 𝐵0𝑠 → 𝐷(*)0 ϕ decays
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13130_2023_Article_22008.pdf
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Author(s)
Aaij, R.
Abdelmotteleb, A. S. W.
Abellan Beteta, C.
Abudinén, F.
Ackernley, T.
Adeva, B.
Adinolfi, M.
Adlarson, P.
Afsharnia, H.
Agapopoulou, C.
Date Issued
October 20, 2023
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2023 Oct 20;2023(10):123
Version
Final published version
Abstract
Abstract
Evidence for the decays B0 →
D
¯
$$ \overline{D} $$
0ϕ and B0 →
D
¯
$$ \overline{D} $$
*0ϕ is reported with a significance of 3.6 σ and 4.3 σ, respectively. The analysis employs pp collision data at centre-of-mass energies
s
$$ \sqrt{s} $$
= 7, 8 and 13 TeV collected by the LHCb detector and corresponding to an integrated luminosity of 9 fb−1. The branching fractions are measured to be
B
B
0
→
D
¯
0
ϕ
=
7.7
±
2.1
±
0.7
±
0.7
×
10
−
7
,
B
B
0
→
D
¯
∗
0
ϕ
=
2.2
±
0.5
±
0.2
±
0.2
×
10
−
6
.
$$ {\displaystyle \begin{array}{l}\mathcal{B}\left({B}^0\to {\overline{D}}^0\phi \right)=\left(7.7\pm 2.1\pm 0.7\pm 0.7\right)\times {10}^{-7},\\ {}\mathcal{B}\left({B}^0\to {\overline{D}}^{\ast 0}\phi \right)=\left(2.2\pm 0.5\pm 0.2\pm 0.2\right)\times {10}^{-6}.\end{array}} $$
In these results, the first uncertainty is statistical, the second systematic, and the third is related to the branching fraction of the B0 →
D
¯
$$ \overline{D} $$
0K+K− decay, used for normalisation. By combining the branching fractions of the decays B0 →
D
¯
∗
0
ϕ
$$ {\overline{D}}^{\left(\ast \right)0}\phi $$
and B0 →
D
¯
∗
0
ω
$$ {\overline{D}}^{\left(\ast \right)0}\omega $$
, the ω-ϕ mixing angle δ is constrained to be tan2 δ = (3.6 ± 0.7 ± 0.4) × 10−3, where the first uncertainty is statistical and the second systematic. An updated measurement of the branching fractions of the
B
s
0
$$ {B}_s^0 $$
→
D
¯
∗
0
ϕ
$$ {\overline{D}}^{\left(\ast \right)0}\phi $$
decays, which can be used to determine the CKM angle γ, leads to
B
B
s
0
→
D
¯
0
ϕ
=
2.30
±
0.10
±
0.11
±
0.20
×
10
−
5
,
B
B
s
0
→
D
¯
∗
0
ϕ
=
3.17
±
0.16
±
0.17
±
0.27
×
10
−
5
.
$$ {\displaystyle \begin{array}{c}\mathcal{B}\left({B}_s^0\to {\overline{D}}^0\phi \right)=\left(2.30\pm 0.10\pm 0.11\pm 0.20\right)\times {10}^{-5},\\ {}\mathcal{B}\left({B}_s^0\to {\overline{D}}^{\ast 0}\phi \right)=\left(3.17\pm 0.16\pm 0.17\pm 0.27\right)\times {10}^{-5}.\end{array}} $$
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DOI of Published Version
https://doi.org/10.1007/JHEP10(2023)123
