First observation of $\Lambda_b^0 \rightarrow \Lambda K^+\pi^-$ and $\Lambda_b^0 \rightarrow \Lambda K^+K^-$ decays at LHCb

The physics potential for $b$ -baryon decays has been relatively unexplored until the advent of the LHC, and as such important questions still exist about their fundamental properties, such as whether their decays exhibit $C ⁣ P$ violation. Presented here are observations of the decays $\Lambda_b^0 \rightarrow \Lambda K^+\pi^- $a n d$ \Lambda_b^0 \rightarrow \Lambda K^+K^-$, made at a significance level of 8.1 and 15.8 Gaussian standard deviations, respectively, and measurements of their branching fractions. The phase-space integrated $C ⁣ P$ asymmetries of these decays are also measured and found to be consistent with zero. Limits are set on the branching fractions of other $Λ_{b}^{0}$ and $Ξ_{b}^{0}$ decays to $Λ h^{+} h^{' -}$ (where $h$ is a kaon or pion).

First observation of $Λ_{b}^{0} \to Λ K^{+} π^{-}$ and $Λ_{b}^{0} \to Λ K^{+} K^{-}$ decays at LHCb

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First observation of $Λ_{b}^{0} \to Λ K^{+} π^{-}$ and $Λ_{b}^{0} \to Λ K^{+} K^{-}$ decays at LHCb

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First observation of Λb0→ΛK+π−Λb0​→ΛK+π− and Λb0→ΛK+K−Λb0​→ΛK+K− decays at LHCb

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First observation of Λb0→ΛK+π−Λb0​→ΛK+π− and Λb0→ΛK+K−Λb0​→ΛK+K− decays at LHCb

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First observation of $Λ_{b}^{0} \to Λ K^{+} π^{-}$ and $Λ_{b}^{0} \to Λ K^{+} K^{-}$ decays at LHCb

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First observation of $Λ_{b}^{0} \to Λ K^{+} π^{-}$ and $Λ_{b}^{0} \to Λ K^{+} K^{-}$ decays at LHCb

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AI智能校验