title: Extracting weak phase information from B-->V1V2 decays
abstract: We describe a new method for extracting weak, CP-violating &Dmacr;phase information, with no hadronic uncertainties, from an angular analysis of B-->V1V2 decays, where V1 and V2 are vector mesons. The quantity sin (2)(2beta+gamma) can be cleanly obtained from the study of decays such as B(0)(d)(t)-->D*+/-rho(-/+), D(*+/-)a(-/+)(1), D(;) *0K(;) (*0), etc. Similarly, one can use B(0)(s)(t)-->D(*+/-)(s)K*-/+ to extract sin (2)gamma. There are no penguin contributions to these decays. It is possible that sin (2)(2beta+gamma) will be the second function of CP phases, after sin2beta, to be measured at B factories.
authors.affiliation: Laboratoire Rene J.-A. Levesque, Universite de Montreal, C.P. 6128, succ. centre-ville, Montreal, Quebec, Canada H3C 3J7.
authors.initials: D
authors.lastname: London
authors.initials: N
authors.lastname: Sinha
authors.initials: R
authors.lastname: Sinha