| Resumen |
The lifetime of the B 0 s meson is measured in the decay channel B 0 s →J/ψπ + π − with 880≤M π + π − ≤1080 MeV/c 2, which is mainly a CP-odd state and dominated by the f 0 (980) resonance. In 10.4 fb−1 of data collected with the D0 detector in Run II of the Tevatron, the lifetime of the B 0 s meson is measured to be τ(B 0 s)=1.70±0.14(stat)±0.05(syst) ps. Neglecting CP violation in B 0 s/B¯0 s mixing, the measurement can be translated into the width of the heavy mass eigenstate of the B 0 s, Γ H =0.59±0.05(stat)±0.02(syst) ps−1. |
