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

Abstract : 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-01038104
Contributor : Sabine Starita <>
Submitted on : Wednesday, July 23, 2014 - 11:49:03 AM
Last modification on : Tuesday, April 20, 2021 - 12:00:14 PM

### Citation

R. Aaij, Y. Amhis, S. Barsuk, M. Borsato, O. Callot, et al.. Measurement of the $B_s^0$ meson lifetime in $D_s^+\pi^-$ decays. Physical Review Letters, American Physical Society, 2014, 113 (17), pp.172001. ⟨10.1103/PhysRevLett.113.172001⟩. ⟨in2p3-01038104⟩

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