Measurement of CP asymmetries and branching fraction ratios of B− decays to two charm mesons
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13130_2023_Article_21882.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
September 28, 2023
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2023 Sep 28;2023(9):202
Version
Final published version
Abstract
Abstract
The CP asymmetries of seven B− decays to two charm mesons are measured using data corresponding to an integrated luminosity of 9 fb−1 of proton-proton collisions collected by the LHCb experiment. Decays involving a D*0 or
D
s
∗
−
$$ {D}_s^{\ast -} $$
meson are analysed by reconstructing only the D0 or
D
s
−
$$ {D}_s^{-} $$
decay products. This paper presents the first measurement of
A
$$ \mathcal{A} $$
CP(B− →
D
s
∗
−
$$ {D}_s^{\ast -} $$
D0) and
A
$$ \mathcal{A} $$
CP(B− →
D
s
−
$$ {D}_s^{-} $$
D∗0), and the most precise measurement of the other five CP asymmetries. There is no evidence of CP violation in any of the analysed decays. Additionally, two ratios between branching fractions of selected decays are measured.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP09(2023)202
