%0 Journal Article
%T Test of lepton flavor universality using B0→D*−τ+ντ decays with hadronic τ channels
%A LHCb Collaboration (Aaij, R. et al
%A Jaimes Elles, S. J.
%A Jashal, B. K.
%A Martinez Vidal, F.
%A Oyanguren, A.
%A Rebollo De Miguel, M.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%A Sanderswood, I.
%A Zhuo, J.
%J Physical Review D
%D 2023
%V 108
%F LHCbCollaborationAaij_etal2023
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=6088), last updated on Fri, 26 Apr 2024 14:51:22 +0000
%X The branching fraction B(B0→D*−τ+ντ) is measured relative to that of the normalization mode B0→D*−π+π−π+ using hadronic τ+→π+π−π+(π0)¯ντ decays in proton-proton collision data at a center-of-mass energy of 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 2  fb−1. The measured ratio is B(B0→D*−τ+ντ)/B(B0→D*−π+π−π+)=1.70±0.10+0.11−0.10, where the first uncertainty is statistical and the second is related to systematic effects. Using established branching fractions for the B0→D*−π+π−π+ and B0→D*−μ+νμ modes, the lepton universality test R(D*−)≡B(B0→D*−τ+ντ)/B(B0→D*−μ+νμ) is calculated, R(D*−)=0.247±0.015±0.015±0.012, where the third uncertainty is due to the uncertainties on the external branching fractions. This result is consistent with the Standard Model prediction and with previous measurements.
%R 10.1103/PhysRevD.108.012018
%U https://arxiv.org/abs/2305.01463
%U https://doi.org/10.1103/PhysRevD.108.012018
%P 012018-18pp