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Measurement of the Lifetime Difference in the B0s System

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<mark>Journal publication date</mark>21/10/2005
<mark>Journal</mark>Physical Review Letters
Issue number17
Pages (from-to)171801
<mark>Original language</mark>English


We present a study of the decay BJ/. We obtain the CP-odd fraction in the final state at time zero, R=0.16±0.10(stat)±0.02(syst), the average lifetime of the (B, ) system, (B)=1.39(stat)(syst) ps, and the relative width difference between the heavy and light mass eigenstates, /(L-H)/=0.24(stat)(syst). With the additional constraint from the world average of the B lifetime measurements using semileptonic decays, we find (B)=1.39±0.06 ps and /=0.25. For the ratio of the B and B0 lifetimes we obtain =0.91±0.09(stat)±0.003

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