Constraining penguin contributions
Deutsches Elektronen-Synchrotron DESY,
Notkestr. 85, 22607 Hamburg, Germany
Received: 1 March 2000 / Published online: 18 May 2000 - © Springer-Verlag 2000
The decays and provide an interesting strategy to extract the CKM angle at ``second-generation'' B-physics experiments of the LHC era. A variant for ``first-generation'' experiments can be obtained, if is replaced by . We show that the most recent experimental results for the CP-averaged and branching ratios imply a rather restricted range for the corresponding penguin parameters, and upper bounds on the direct CP asymmetries and . Moreover, we point out that interesting constraints on can be obtained from
the CP-averaged and branching ratios, if in addition mixing-induced CP violation in the former decay is measured, and the B0d- mixing phase is fixed through . An extraction of becomes possible, if furthermore direct CP violation in or is observed.
Copyright Società Italiana di Fisica, Springer-Verlag 2000