DECAYS OF B-MESONS TO 2 LIGHT PSEUDOSCALARS

The decays B --> PP, where P denotes a light pseudoscalar meson, are a nalyzed. Numerous triangle relations for amplitudes hold within flavor SU(3) symmetry, relating (for example) the decays B+ --> pi+pi0, pi0K +, and pi+K0. Such relations can improve the possibilities for learnin g about phases of the Cabibbo-Kobayashi-Maskawa (CKM) matrix and for e arly detection of CP-violating asymmetries. Within the context of a gr aphical analysis of decays, relations are analyzed among SU(3) amplitu des which hold if some graphs are neglected. These relations allow the determination of weak and strong phases from rate measurements alone. Estimates of SU(3) breaking are included.