Observation of the B0s → D∗+D∗− decay

LHCb collaboration, R.H. O'Neil, M. Richardson-Slipper, C. Vrahas

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The first observation of the B0s → D∗+D∗− decay and the measurement of its
branching ratio relative to the B0 → D∗+D∗− decay are presented. The data sample used corresponds to an integrated luminosity of 9 fb−1 of proton-proton collisions recorded by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV between 2011 and 2018. The decay is observed with more than 10 standard deviations and the time-integrated ratio of branching fractions is determined to be
B(B0s → D∗+D∗−)
B(B0 → D∗+D∗−) = 0.269 ± 0.032 ± 0.011 ± 0.008 ,
where the first uncertainty is statistical, the second systematic and the third due to the uncertainty of the fragmentation fraction ratio fs/fd. The B0s → D∗+D∗− branching fraction is calculated to be
B(B0s → D∗+D∗−) = (2.15 ± 0.26 ± 0.09 ± 0.06 ± 0.16) × 10−4 ,
where the fourth uncertainty is due to the B0 → D∗+D∗− branching fraction. These results are calculated using the average B0s meson lifetime in simulation. Correction factors are reported for scenarios where either a purely heavy or a purely light B0s eigenstate is considered.
Original languageEnglish
Article number119
Pages (from-to)1-18
Number of pages18
Journal Journal of High Energy Physics
Issue number7
Publication statusPublished - 13 Jul 2023

Keywords / Materials (for Non-textual outputs)

  • Branching fraction
  • Hadron-Hadron Scattering


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