Measurement of the B ̄s0 → D s- Ds+ and ̄ Bs 0 → D-Ds+ effective lifetimes

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doi:10.1103/PhysRevLett.112.111802

The first measurement of the effective lifetime of the B̄s0 meson in the decay B̄s0→Ds-Ds+ is reported using a proton-proton collision data set, corresponding to an integrated luminosity of 3 fb-1, collected by the LHCb experiment. The measured value of the B̄s0→Ds-Ds+ effective lifetime is 1.379±0.026±0.017 ps, where the uncertainties are statistical and systematic, respectively. This lifetime translates into a measurement of the decay width of the light B̄s0 mass eigenstate of ΓL=0.725±0. 014±0.009 ps-1. The B̄s0 lifetime is also measured using the flavor-specific B̄s0→D-Ds+ decay to be 1.52±0.15±0.01 ps. © 2014 CERN, for the LHCb Collaboration.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., et al. (2014). Measurement of the B ̄s0 → D s- Ds+ and ̄ Bs 0 → D-Ds+ effective lifetimes. PHYSICAL REVIEW LETTERS, 112(11) [10.1103/PhysRevLett.112.111802].