Measurement of CP asymmetries and branching fraction ratios of B¯ decays to two charm mesons

LHCb Collaboration; Aaij, Roel; Chobanova, Veronika; Bishop, Fionn

Use this link to cite:

http://hdl.handle.net/2183/42114

Measurement of CP asymmetries and branching fraction ratios of B¯ decays to two charm mesons

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Chobanova_Veronika_2023_Measurement_CP_asymmetries_branching_fraction_ratios.pdf (1.05 MB)

Identifiers

URI: http://hdl.handle.net/2183/42114

DOI: https://doi.org/10.1007/JHEP09(2023)202

Publication date

2023-09

Authors

LHCb Collaboration

Aaij, Roel

Chobanova, Veronika

Bishop, Fionn

Bibliographic citation

The LHCb collaboration., Aaij, R., Abdelmotteleb, A.S.W. et al. Measurement of CP asymmetries and branching fraction ratios of B¯ decays to two charm mesons. J. High Energ. Phys. 2023, 202 (2023). https://doi.org/10.1007/JHEP09(2023)202

Abstract

[Abstract] The CP asymmetries of seven B¯ decays to two charm mesons are measured using data corresponding to an integrated luminosity of 9fb¯¹ of proton-proton collisions collected by the LHCb experiment. Decays involving a D* or D*¯s meson are analysed by reconstructing only the D° or D¯s decay products. This paper presents the first measure ment of Acp(B¯ → D*¯s D°) and Acp(B¯ → D¯s D*°), 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.