CP violating phase y from a global fit of rare charmless hadronic B decays
Journal
Physical Review D
Journal Volume
64
Journal Issue
3
Date Issued
2001
Author(s)
Abstract
We study the constraints on the CP violating phase y in the Kobayashi-Maskawa model using available experimental data. We first follow the conventional method to update the constraint on y by performing a x2 analysis using data from \eK\, &»IBJS< and I V,i,/Vcfc|. We also include the recent information on sin Iβ in the analysis. We obtain the best fit for y to be 66° and the 95% C.L. allowed range to be 42°-87°. We then develop a method to carry out a x2 analysis based on 5f/(3) symmetry using data from B-TTTT and B -»ATvr. We also discuss St/(3) breaking effects from a model estimate. We find that the present data on B ->TTTT,KTT can also give some constraint on y although weaker than the earlier method limited by the present experimental errors. Future improved data will provide a more stringent constraint. Finally we perform a combined fit using data from \eK\, A;;iBjj, |Vi/Vcj,|, sin2jβ, and rare charmless hadronic B decays. The combined analysis gives y=67° for the best-fit value and 43°-87° as the 95% C.L. allowed range. Several comments on other methods to determine y based on 5(7(3) symmetry are also provided. ©2001 The American Physical Society.
Type
journal article