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2017

Measurement of $B^{0}_{s}$ and $D^{-}_{s}$ meson lifetimes

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

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We report on a measurement of the flavor-specific $B^{0}_{s}$ lifetime and of the $D^{-}_{s}$ 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 fb$^{-1}$ of integrated luminosity.

Approximately 407 000 $B^{0}_{s} \rightarrow D^{(*)-}_{s} \mu^{+}\nu_\mu $ decays are partially reconstructed in the $K^{+}K^{-}\pi^{-}\mu^{+}$ final state.
The $B^{0}_{s}$ and $D^{-}_{s}$ natural widths are determined using, as a reference, kinematically similar $B^{0} \rightarrow D^{(*)-}\mu^{+}\nu_\mu$ decays reconstructed in the same final state.
The resulting differences between widths of $B^{0}_{s}$ and $B^{0}$ mesons and of $D^{-}_{s}$ and $D^{-}$ mesons are $\Delta_\Gamma(B) =-0.0115 \pm 0.0053 (stat) \pm 0.0041 (syst)$ ps$^{-1}$ and $\Delta_\Gamma(D) = 1.0131 \pm 0.0117 (stat) \pm 0.0065 (syst)$ ps$^{-1}$, respectively.

Measurement of $B^{0}_{s}$ and $D^{-}_{s}$ meson lifetimes · Around

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I. Caprini, L. Lellouch, and M. Neubert, Dispersive bounds on the shape of B 0 → D ( ∗ ) ℓ ν ¯ ℓ {{B}^{0}}\rightarrow D^{(*)}\ell\bar{\nu}_{\ell} form factors , Nucl. Phys. B530
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CDF collaboration, A. Abulencia et al
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N. T. Leonardo, Analysis of B s 0 {B}^{0}_{s} flavor oscillations at CDF
2006
Earlier work this paper cites.

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For a recent review, see A. Lenz, Lifetimes and HQE , arXiv:1405.3601 and references therein
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K. Hartkorn and H. G. Moser, A new method of measuring Δ ⁡ ( Γ ) / Γ \Delta(\Gamma)/\Gamma in the B s 0 {B}^{0}_{s} - B ¯ 0 s {\kern 1.79993pt\overline{\kern-1.79993ptB}{}}{}^{0}_{s} system , Eur. Phys. J. C8
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D0 collaboration, V. M. Abazov et al
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Fermilab E653 collaboration, K. Kodama et al
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Then

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Original
2014
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LHCb collaboration, R. Aaij et al
Original
2015
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Heavy Flavor Averaging Group, Y. Amhis et al
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2016
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Particle Data Group, C. Patrignani et al
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