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

LHCb collaboration, R.I. Rabadan Trejo*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The decays of the B + meson to the final state D ∗−D s +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 ∗−D s +π + and B 0→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 s +γ and D s +π 0 decays, the ratio of branching fractions between the B +→D ∗−D s ∗+π + and B +→D ∗−D s +π + decays is determined as 1.31 ± 0.07 ± 0.14. An amplitude analysis of the B +→D ∗−D s +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 D s +π + or D ∗−D s + channels is found. The fit fraction of the scalar state T cs¯0 2900 ++ observed in the B +→D D s +π + decay is determined to be less than 2.3% at a 90% confidence level.

Original languageEnglish
Article number165
JournalJournal of High Energy Physics
Volume2024
Issue number8
DOIs
Publication statusPublished - 1 Aug 2024

Keywords

  • Branching fraction
  • Charm Physics
  • Hadron-Hadron Scattering
  • Spectroscopy

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