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Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>D</mml:mi><mml:mi>s</mml:mi><mml:mo>โ</mml:mo></mml:msubsup></mml:math> Meson Lifetimes
We report on a measurement of the flavor-specific ${B}_{s}^{0}$ lifetime and of the ${D}_{s}^{\ensuremath{-}}$ lifetime using proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to $3.0\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of integrated luminosity. Approximately 407 000 ${B}_{s}^{0}\ensuremath{\rightarrow}{D}_{s}^{(*)\ensuremath{-}}{\ensuremath{\mu}}^{+}{\ensuremath{\nu}}_{\ensuremath{\mu}}$ decays are partially reconstructed in the โฆ