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2014

Measurement of the $B_s^0$ meson lifetime in $D_s^+\pi^-$ decays

LHCb collaboration, Aaij, R., Adeva, B. et al.

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We present a measurement of the ratio of the Bs meson lifetime, in the flavor-specific decay to $D_s^+\pi^-$, to that of the B0 meson.

The pp collision data used correspond to an integrated luminosity of 1/fb, collected with the LHCb detector, at a center-of-mass energy of 7 TeV.
Combining our measured value of 1.010 +/- 0.010 +/- 0.008 for this ratio with the known lifetime, we determine the flavor-specific Bs lifetime to be tau(Bs) = 1.535 +/- 0.015 +/- 0.014 ps, where the uncertainties are statistical and systematic, respectively.
This is the most precise measurement to date, and is consistent with previous measurements and theoretical predictions.

Measurement of the $B_s^0$ meson lifetime in $D_s^+\pi^-$ decays · Around

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