The experimental results on the ratios of branching fractions R(D)=B(B→Dτ-ντ)/B(B→Dℓ-νℓ) and R(D∗)=B(B→D∗τ-ντ)/B(B→D∗ℓ-νℓ), where ℓ denotes an electron or a muon, show a long-standing discrepancy with the standard model predictions, and might hint at a violation of lepton flavor universality. We report a new simultaneous measurement of R(D) and R(D∗), based on a data sample containing 772×106 BB events recorded at the ϒ(4S) resonance with the Belle detector at the KEKB e+e- collider. In this analysis the tag-side B meson is reconstructed in a semileptonic decay mode and the signal-side τ is reconstructed in a purely leptonic decay. The measured values are R(D)=0.307±0.037±0.016 and R(D∗)=0.283±0.018±0.014, where the first uncertainties are ...
International audienceWe report the first direct measurement of the inclusive branching fraction B(B...
We report a measurement of the branching fraction ratios R(D(*)) of ¯B→D(*)τ−¯ντ relative to ¯B→D(*)...
We report on measurements of the decays of [bar over B] mesons into the semileptonic final states [b...
The experimental results on the ratios of branching fractions R(D)=B(B→Dτ-ντ)/B(B→Dℓ-νℓ) and R(D∗)=B...
The experimental results on the ratios of branching fractions R(D)=B(B[over ¯]→Dτ^{-}ν[over ¯]_{τ})/...
The experimental results on the ratios of branching fractions R(D) = B((B) over bar -> D tau(-)(nu) ...
The experimental results on the ratios of branching fractions R(D) = B((B) over bar -> D tau(-)(nu) ...
The experimental results on the ratios of branching fractions $\mathcal{R}(D) = {\cal B}(\bar{B} \to...
We report a measurement of ratio R(D ∗ ) = B(B¯0 → D ∗+τ −ν¯τ )/B(B¯0 → D ∗+ℓ −ν¯ℓ), where ℓ denotes...
We report a measurement of the ratios of branching fractions $\mathcal{R}(D) = {\cal B}(\bar{B} \to ...
We report a measurement of the ratio R(D*)=B(B¯0→D*+τ-ν¯τ)/B(B¯0→D*+ℓ-ν¯ℓ), where ℓ denotes an elect...
Lepton universality violation would represent a signal of physics beyond the Standard Model. Semilep...
We present a measurement of the decay B-→τ -ν̄τ using a data sample containing 657×106 BB̄ pairs col...
We report the first direct measurement of the inclusive branching fraction B(Bs→DsX) via Bs tagging ...
We report a measurement of the ratio R(D*) = B((B) over bar (0) -�� D*(+)tau(-)(nu) over bar (tau))/...
International audienceWe report the first direct measurement of the inclusive branching fraction B(B...
We report a measurement of the branching fraction ratios R(D(*)) of ¯B→D(*)τ−¯ντ relative to ¯B→D(*)...
We report on measurements of the decays of [bar over B] mesons into the semileptonic final states [b...
The experimental results on the ratios of branching fractions R(D)=B(B→Dτ-ντ)/B(B→Dℓ-νℓ) and R(D∗)=B...
The experimental results on the ratios of branching fractions R(D)=B(B[over ¯]→Dτ^{-}ν[over ¯]_{τ})/...
The experimental results on the ratios of branching fractions R(D) = B((B) over bar -> D tau(-)(nu) ...
The experimental results on the ratios of branching fractions R(D) = B((B) over bar -> D tau(-)(nu) ...
The experimental results on the ratios of branching fractions $\mathcal{R}(D) = {\cal B}(\bar{B} \to...
We report a measurement of ratio R(D ∗ ) = B(B¯0 → D ∗+τ −ν¯τ )/B(B¯0 → D ∗+ℓ −ν¯ℓ), where ℓ denotes...
We report a measurement of the ratios of branching fractions $\mathcal{R}(D) = {\cal B}(\bar{B} \to ...
We report a measurement of the ratio R(D*)=B(B¯0→D*+τ-ν¯τ)/B(B¯0→D*+ℓ-ν¯ℓ), where ℓ denotes an elect...
Lepton universality violation would represent a signal of physics beyond the Standard Model. Semilep...
We present a measurement of the decay B-→τ -ν̄τ using a data sample containing 657×106 BB̄ pairs col...
We report the first direct measurement of the inclusive branching fraction B(Bs→DsX) via Bs tagging ...
We report a measurement of the ratio R(D*) = B((B) over bar (0) -�� D*(+)tau(-)(nu) over bar (tau))/...
International audienceWe report the first direct measurement of the inclusive branching fraction B(B...
We report a measurement of the branching fraction ratios R(D(*)) of ¯B→D(*)τ−¯ντ relative to ¯B→D(*)...
We report on measurements of the decays of [bar over B] mesons into the semileptonic final states [b...