LIFETIME DIFFERENCE OF B , MESONS AND ITS IMPLICATIONS a
نویسنده
چکیده
We discuss the calculationof the width difference APB. between the Bs mass eigen-states to next-to-leading order in the heavy quark expansion. l/rat,-corrections are estimated to reduce the leading order result by typically 30%. The error of the present estimate (Al?/P),, = O.lS~ " ,:$ could be substantially improved by pinning down the value of (B,~(~~~~)s-P(~~s~)s-PIB~) and an accuracy of 10% in the observation of CP violation in untagged B, samples.. We discuss the calculationof the width difference APB, between the B, mass eigenstates to next-to-leading order in the heavy quark expansion. l/mb-corrections are estimated to reduce the leading order result by typically 30%. The error of the present estimate (Af'/P),, = O.lS~ " ,:~~ could be substantially improved by pinning down the value of (Bsl(6isi)S-P(6353)S-PIBs) and an accuracy of 10% in (AP/P)B8 should eventually be reached. We briefly mention strategies to measure (AP/P),, , and its implications for constraints on AMB~, CKM parameters and the observation of CP violation in untagged B, samples.
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