We present measurements of the lifetimes and polarization amplitudes for Bs0→J/ψϕ and Bd0→J/ψK*0 decays. Lifetimes of the heavy and light mass eigenstates in the Bs0 system are separately measured for the first time by determining the relative contributions of amplitudes with definite CP as a function of the decay time. Using 203±15 Bs0 decays we obtain τL=(1.05-0.13+0.16±0.02) ps and τH=(2.07-0.46+0.58±0.03) ps. Expressed in terms of the difference ΔΓs and average Γs, of the decay rates of the two eigenstates, the results are ΔΓs/Γs=(65-33+25±1)% and ΔΓs=(0.47-0.24+0.19±0.01) ps-1.
Measurement of the lifetime difference between B-s mass eigenstates
Cauz D;Giordani M;Pauletta G;santi l;Scuri F;
2005-01-01
Abstract
We present measurements of the lifetimes and polarization amplitudes for Bs0→J/ψϕ and Bd0→J/ψK*0 decays. Lifetimes of the heavy and light mass eigenstates in the Bs0 system are separately measured for the first time by determining the relative contributions of amplitudes with definite CP as a function of the decay time. Using 203±15 Bs0 decays we obtain τL=(1.05-0.13+0.16±0.02) ps and τH=(2.07-0.46+0.58±0.03) ps. Expressed in terms of the difference ΔΓs and average Γs, of the decay rates of the two eigenstates, the results are ΔΓs/Γs=(65-33+25±1)% and ΔΓs=(0.47-0.24+0.19±0.01) ps-1.File in questo prodotto:
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