The first observation of the semileptonic b-baryon decay Λb0 → Λc+ τ− anti-ν_τ, with a significance of 6.1 σ, is reported using a data sample corresponding to 3 fb^−1 of integrated luminosity, collected by the LHCb experiment at center-of-mass energies of 7 and 8 TeV at the LHC. The τ− lepton is reconstructed in the hadronic decay to three charged pions. The ratio K = B(Λb0 → Λc+ τ− anti-ν_τ) / B(Λb0 → Λc+ π− π+ π−) is measured to be 2.46 ± 0.27 ± 0.40, where the first uncertainty is statistical and the second systematic. The branching fraction B(Λb0 → Λc+ τ− anti-ν_τ) = (1.50 ± 0.16 ± 0.25 ± 0.23)% is obtained, where the third uncertainty is from the external branching fraction of the normalization channel Λb0 → Λc+ π− π+ π−. The ratio of ...
The first observation of the semileptonic b-baryon decay Λ0b→Λ+cτ−¯ντ, with a significance of 6.1σ, ...
: The first observation of the semileptonic b-baryon decay Λ_{b}^{0}→Λ_{c}^{+}τ^{-}ν[over ̄]_{τ}, w...
International audienceThe first observation of the semileptonic b-baryon decay Λ0b→Λ+cτ−¯ντ, with a ...
The first observation of the semileptonic b-baryon decay Λb0 → Λc+ τ− anti-ν_τ, with a significance ...
The first observation of the semileptonic b-baryon decay Λb0→Λc+τ-ν¯τ, with a significance of 6.1σ, ...
The first observation of the semileptonic b-baryon decay Λ0b → Λ+cτ−¯ντ, with a significance of 6.1σ...
The first observation of the semileptonic b-baryon decay Λ0b→Λ+cτ−¯ντ, with a significance of 6.1σ, ...
: The first observation of the semileptonic b-baryon decay Λ_{b}^{0}→Λ_{c}^{+}τ^{-}ν[over ̄]_{τ}, w...
International audienceThe first observation of the semileptonic b-baryon decay Λ0b→Λ+cτ−¯ντ, with a ...
The first observation of the semileptonic b-baryon decay Λb0 → Λc+ τ− anti-ν_τ, with a significance ...
The first observation of the semileptonic b-baryon decay Λb0→Λc+τ-ν¯τ, with a significance of 6.1σ, ...
The first observation of the semileptonic b-baryon decay Λ0b → Λ+cτ−¯ντ, with a significance of 6.1σ...
The first observation of the semileptonic b-baryon decay Λ0b→Λ+cτ−¯ντ, with a significance of 6.1σ, ...
: The first observation of the semileptonic b-baryon decay Λ_{b}^{0}→Λ_{c}^{+}τ^{-}ν[over ̄]_{τ}, w...
International audienceThe first observation of the semileptonic b-baryon decay Λ0b→Λ+cτ−¯ντ, with a ...