Amplitude analysis and branching fraction measurement of 𝐵+→𝐷∗−𝐷+𝑠𝜋+ decays
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13130_2024_Article_24299.pdf
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Author(s)
Aaij, R.
Abdelmotteleb, A. S. W.
Abellan Beteta, C.
Abudinén, F.
Ackernley, T.
Adams, J. A.
Adefisoye, A. A.
Adeva, B.
Adinolfi, M.
Adlarson, P.
Date Issued
August 21, 2024
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
The LHCb collaboration., Aaij, R., Abdelmotteleb, A.S.W. et al. Amplitude analysis and branching fraction measurement of 𝐵+→𝐷∗−𝐷+𝑠𝜋+ decays. J. High Energ. Phys. 2024, 165 (2024).
Version
Final published version
Abstract
The decays of the B+ meson to the final state 𝐷∗−𝐷+𝑠𝜋+
are studied in proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb−1. The ratio of branching fractions of the 𝐵+→𝐷∗−𝐷+𝑠𝜋+
and 𝐵0→𝐷∗−𝐷+𝑠
decays is measured to be 0.173 ± 0.006 ± 0.010, where the first uncertainty is statistical and the second is systematic. Using partially reconstructed 𝐷∗+𝑠→𝐷+𝑠𝛾
and 𝐷+𝑠𝜋0
decays, the ratio of branching fractions between the 𝐵+→𝐷∗−𝐷∗+𝑠𝜋+
and 𝐵+→𝐷∗−𝐷+𝑠𝜋+
decays is determined as 1.31 ± 0.07 ± 0.14. An amplitude analysis of the 𝐵+→𝐷∗−𝐷+𝑠𝜋+
decay is performed for the first time, revealing dominant contributions from known excited charm resonances decaying to the D*−π+ final state. No significant evidence of exotic contributions in the 𝐷+𝑠𝜋+
or 𝐷∗−𝐷+𝑠
channels is found. The fit fraction of the scalar state 𝑇∗𝑐𝑠⎯⎯⎯0(2900)++
observed in the 𝐵+→𝐷−𝐷+𝑠𝜋+
decay is determined to be less than 2.3% at a 90% confidence level.
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DOI of Published Version
https://doi.org/10.1007/JHEP08(2024)165
