A model-independent measurement of the CKM angle γ in partially reconstructed B± → D*h± decays with D → 𝐾0𝑆 h+h− (h = π, K)
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13130_2024_Article_22828.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.
Agapopoulou, C.
Aidala, C. A.
Date Issued
February 16, 2024
Journal
Journal of High Energy Physics
Publisher
Springer Science and Business Media LLC
Citation
The LHCb collaboration., Aaij, R., Abdelmotteleb, A.S.W. et al. A model-independent measurement of the CKM angle γ in partially reconstructed B± → D*h± decays with D → 𝐾0𝑆
h+h− (h = π, K). J. High Energ. Phys. 2024, 118 (2024).
Version
Final published version
Abstract
A measurement of CP-violating observables in B± → D*K± and B± → D*π± decays is made where the photon or neutral pion from the D*→ Dγ or D*→ Dπ0 decay is not reconstructed. The D meson is reconstructed in the self-conjugate decay modes, D → $$ {K}_S^0 $$
K S 0 π+π− or D → $$ {K}_S^0 $$ K S 0 K+K−. The distribution of signal yields in the D decay phase space is analysed in a model-independent way. The measurement uses a data sample collected in proton-proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of approximately 9 fb−1. The B± → D*K± and B± → D*π±CP-violating observables are interpreted in terms of hadronic parameters and the CKM angle γ, resulting in a measurement of γ = ($$ {92}_{-17}^{+21} $$ 92 − 17 + 21 )°. The total uncertainty includes the statistical and systematic uncertainties, and the uncertainty due to external strong-phase inputs.
K S 0 π+π− or D → $$ {K}_S^0 $$ K S 0 K+K−. The distribution of signal yields in the D decay phase space is analysed in a model-independent way. The measurement uses a data sample collected in proton-proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of approximately 9 fb−1. The B± → D*K± and B± → D*π±CP-violating observables are interpreted in terms of hadronic parameters and the CKM angle γ, resulting in a measurement of γ = ($$ {92}_{-17}^{+21} $$ 92 − 17 + 21 )°. The total uncertainty includes the statistical and systematic uncertainties, and the uncertainty due to external strong-phase inputs.
Subjects
Nuclear and High Energy Physics
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1007/jhep02(2024)118
