Model independent bound on the unitarity triangle from CP violation in B-->pi(+)pi(-) and B-->psiK(S).
We derive model-independent lower bounds on the CKM parameters (1-rho) and eta as functions of the mixing-induced CP asymmetry S in B-->pi(+)pi(-) and sin(2 beta from B-->psiK(S). The bounds do not depend on specific results of theoretical calculations for the penguin contribution to B-->pi(+)pi(-). They require only the very conservative condition that a hadronic phase, which vanishes in the heavy-quark limit, does not exceed 90 degrees in magnitude. The bounds are effective if -sin(2 beta</=S</=1. Dynamical calculations indicate that the limits on rho and eta are close to their actual values.
Ludwig-Maximilians-Universität München, Sektion Physik, Theresienstrasse 37, D-80333 Munich, Germany.
Gerhard
G
Buchalla
A Salim
AS
Safir