Hadronic pollution in B -> rho pi?

Abstract

The B -> 3pi decay via rho has been shown, in two independent calculations, to be very sensible to the B -> sigma pi background. This potentially complicates the extraction of alpha through the isospin analysis of B -> rho pi. I will briefly review this topic.

Comments: Talk given at the Workshop on the CKM Unitarity Triangle, IPPP Durham, April 2003 (eConf C0304052). 3 pages LaTeX, 2 eps figures