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Amplitude analysis and branching fraction measurement of B+→D∗−Ds+π+ decays

Aaij, R. ; Ruiz-Vidal, Joan LU and Zunica, G. (2024) In Journal of High Energy Physics 2024(8).
Abstract
The decays of the B+ meson to the final state D∗−Ds+π+ 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∗−Ds+π+ and B0→D∗−Ds+ 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 Ds∗+→Ds+γ and Ds+π0 decays, the ratio of branching fractions between the B+→D∗−Ds∗+π+ and B+→D∗−Ds+π+ decays is determined as 1.31 ± 0.07 ± 0.14. An amplitude analysis of the B+→D∗−Ds+π+ decay is performed for the first time, revealing dominant contributions from known excited charm resonances... (More)
The decays of the B+ meson to the final state D∗−Ds+π+ 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∗−Ds+π+ and B0→D∗−Ds+ 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 Ds∗+→Ds+γ and Ds+π0 decays, the ratio of branching fractions between the B+→D∗−Ds∗+π+ and B+→D∗−Ds+π+ decays is determined as 1.31 ± 0.07 ± 0.14. An amplitude analysis of the B+→D∗−Ds+π+ 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 Ds+π+ or D∗−Ds+ channels is found. The fit fraction of the scalar state Tcs¯0∗2900++ observed in the B+→D−Ds+π+ decay is determined to be less than 2.3% at a 90% confidence level. © The Author(s) 2024. (Less)
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Contribution to journal
publication status
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subject
keywords
Branching fraction, Charm Physics, Hadron-Hadron Scattering, Spectroscopy
in
Journal of High Energy Physics
volume
2024
issue
8
article number
165
publisher
Springer
external identifiers
  • scopus:85202935743
ISSN
1029-8479
DOI
10.1007/JHEP08(2024)165
language
English
LU publication?
yes
id
574bbaf6-786d-4487-969d-23d9ee813aab
date added to LUP
2025-10-14 15:59:12
date last changed
2025-10-14 16:00:30
@article{574bbaf6-786d-4487-969d-23d9ee813aab,
  abstract     = {{The decays of the B+ meson to the final state D∗−Ds+π+ 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∗−Ds+π+ and B0→D∗−Ds+ 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 Ds∗+→Ds+γ and Ds+π0 decays, the ratio of branching fractions between the B+→D∗−Ds∗+π+ and B+→D∗−Ds+π+ decays is determined as 1.31 ± 0.07 ± 0.14. An amplitude analysis of the B+→D∗−Ds+π+ 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 Ds+π+ or D∗−Ds+ channels is found. The fit fraction of the scalar state Tcs¯0∗2900++ observed in the B+→D−Ds+π+ decay is determined to be less than 2.3% at a 90% confidence level. © The Author(s) 2024.}},
  author       = {{Aaij, R. and Ruiz-Vidal, Joan and Zunica, G.}},
  issn         = {{1029-8479}},
  keywords     = {{Branching fraction; Charm Physics; Hadron-Hadron Scattering; Spectroscopy}},
  language     = {{eng}},
  number       = {{8}},
  publisher    = {{Springer}},
  series       = {{Journal of High Energy Physics}},
  title        = {{Amplitude analysis and branching fraction measurement of B+→D∗−Ds+π+ decays}},
  url          = {{http://dx.doi.org/10.1007/JHEP08(2024)165}},
  doi          = {{10.1007/JHEP08(2024)165}},
  volume       = {{2024}},
  year         = {{2024}},
}