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Measurement of the $Ω_b^-$ baryon lifetime
The lifetime ratio ${r_τ\equivτ_{Ω_b^-}/τ_{Ξ_b^-}}$ between the ${Ω_b^-}$ and ${Ξ_b^-}$ baryons is measured using a sample of $pp$ collision data corresponding to an integrated luminosity of 6 fb$^{-1}$ and collected by the LHCb experiment during LHC Run 2 (2015$-$2018). The ratio $r_τ$ is measured
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