Cp and B Physics: Progress and Prospects

Abstract

This summary of the 2nd International Conference on B Physics and CP Violation (Honolulu, 24-27 March, 1997) contains, in addition to what is implied in the title, some extended remarks on the limitations of theory as well as speculations regarding nonperturbative enhancement of decay modes of the class b → s+ charmless hadrons.

Heavy Quark Effective Theory and Weak Matrix Elements

“…However, it has been stressed that significant long-distance contributions to the charm penguin are required to fit the data [91,92]. This is not too surprising, since the energy release in B decays is such that the cc pair in the charm penguin is not far from its mass shell, and hence this penguin is really more a longdistance than a short-distance process [93]. This is illustrated in Fig.…”

“…At least to some extent these are different words for the same physics. In a way, the charm penguin is all there is in b → s FCNC processes [93], because the unitarity of the CKM matrix implies that q=u,c,t…”