PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - T08 Flavour Physics and CP Violation
LHCb measurements on semileptonic decays of b-hadrons
C. Chen
Full text: pdf
Pre-published on: January 29, 2024
Published on: March 21, 2024
Semileptonic b-hadron decays provide various opportunities for the searches of the New Physics~(NP) beyond the Standard Model~(SM). This proceeding covers three recent relevant studies at the LHCb experiment.
There are two new contributions to R(D*), including the simultaneous measurements of R(D) and R(D*) with the muonic tau+ decay using the LHCb Run1 data, and the R(D*) measurement based on the hadronic tau+ decays using the 2015-2016 data.
With these latest results included, the combination of R(D) and R(D*) shows a tension over three standard deviations from the SM predictions.
The first LHCb result of the D* longitudinal polarisation in the B0 -> D*- tau+ nv decay is also presented, where the result is consistent with the SM prediction.
DOI: https://doi.org/10.22323/1.449.0338
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