An analysis of the time-dependent CP asymmetryin decays in the standard model
Theory Group, Deutsches Elektronen-Synchrotron DESY, 22603, Hamburg, Germany
2 Institut für Theoretische Physik, Universität Bern, 3012, Bern, Switzerland
3 Institut für Theoretische Physik, Universität Zürich, 8057, Zürich, Switzerland
* e-mail: email@example.com
Measurements of the time-dependent CP-asymmetry in the decay and its charge conjugate by the BELLE and BABAR collaborations currently yield and , characterizing the direct and mixing-induced CP-asymmetries, respectively. We study the implication of these measurements on the CKM phenomenology taking into account the available information in the quark mixing sector. Our analysis leads to the results that the ratio |P c /T c | involving the QCD-penguin and tree amplitudes and the related strong phase difference in the decays are quite substantial. Using the isospin symmetry to constrain |P c /T c | and , where parameterizes the penguin-induced contribution, we present a fit of the current data including the measurements of and . Our best-fits yield , , , , and . At 68% C.L., the ranges are , , , and . Currently en vogue dynamical approaches to estimate the hadronic matrix elements in decays do not provide a good fit of the current data.
© Springer-Verlag, 2004