@Article{LHCbCollaborationAaij_etal2023,
author="LHCb Collaboration (Aaij, R. et al
and Jaimes Elles, S. J.
and Jashal, B. K.
and Martinez Vidal, F.
and Oyanguren, A.
and Rebollo De Miguel, M.
and Remon Alepuz, C.
and Ruiz Vidal, J.
and Sanderswood, I.
and Zhuo, J.",
title="Test of lepton flavor universality using B0{\textrightarrow}D*-$\tau$+$\nu$$\tau$ decays with hadronic $\tau$ channels",
journal="Physical Review D",
year="2023",
volume="108",
pages="012018--18pp",
abstract="The branching fraction B(B0{\textrightarrow}D*-$\tau$+$\nu$$\tau$) is measured relative to that of the normalization mode B0{\textrightarrow}D*-$\pi$+$\pi$-$\pi$+ using hadronic $\tau$+{\textrightarrow}$\pi$+$\pi$-$\pi$+($\pi$0){\textasciimacron}$\nu$$\tau$ decays in proton-proton collision data at a center-of-mass energy of 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 2{\thinspace}{\thinspace}fb-1. The measured ratio is B(B0{\textrightarrow}D*-$\tau$+$\nu$$\tau$)/B(B0{\textrightarrow}D*-$\pi$+$\pi$-$\pi$+)=1.70{\textpm}0.10+0.11-0.10, where the first uncertainty is statistical and the second is related to systematic effects. Using established branching fractions for the B0{\textrightarrow}D*-$\pi$+$\pi$-$\pi$+ and B0{\textrightarrow}D*-$\mu$+$\nu$$\mu$ modes, the lepton universality test R(D*-)=B(B0{\textrightarrow}D*-$\tau$+$\nu$$\tau$)/B(B0{\textrightarrow}D*-$\mu$+$\nu$$\mu$) is calculated, R(D*-)=0.247{\textpm}0.015{\textpm}0.015{\textpm}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.",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=6088), last updated on Fri, 26 Apr 2024 14:51:22 +0000",
doi="10.1103/PhysRevD.108.012018",
opturl="https://arxiv.org/abs/2305.01463",
opturl="https://doi.org/10.1103/PhysRevD.108.012018"
}