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Search for K⁰_(S(L))toμ^+μ^-μ^+μ^- decays at LHCb
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Search for K⁰_(S(L))toμ^+μ^-μ^+μ^- decays at LHCb
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A search for $K_{\textrm{S(L)}}^0\rightarrow\mu^{+}\mu^{-}\mu^{+}\mu^{-}$ decays is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.1 $fb^{-1}$. No evidence for signal is found. The 90\% confidence level upper limits are the first set for both decays and are $B(K_{\textrm{S}}^0\rightarrow\mu^{+}\mu^{-}\mu^{+}\mu^{-}) < 5.1\times 10^{-12}$ and $B(K_{\textrm{L}}^0\rightarrow\mu^{+}\mu^{-}\mu^{+}\mu^{-}) < 2.3\times 10^{-9}$.
Forward citations
Cited by 2 Pith papers
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Search for $K_{\mathrm{S(L)}}^{0} \rightarrow \pi^{+}\pi^{-}\mu^{+}\mu^{-}$ decays at LHCb
No evidence for KS0 or KL0 to pi+ pi- mu+ mu- decays; first upper limits set at 1.4e-9 and 6.6e-7 (90% CL).
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Branching fraction measurement of the $\mathit{\Lambda} \to p \mu^- \overline{\nu}_{\mu}$ decay
Branching fraction B(Λ → p μ⁻ ν̄_μ) measured as (1.462 ± 0.016 ± 0.100 ± 0.011) × 10^{-4}, improving prior precision by a factor of two and yielding R^{μe} = 0.175 ± 0.012 consistent with the Standard Model.
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