Chiral dynamics and B to 3 pi decay

Abstract

I discuss our knowledge of the scalar sector of QCD and how it impacts the determination of the CKM angle \alpha from the isospin analysis of B\to \rho\pi decay.

Comments: invited talk at International Workshop on Heavy Quarks and Leptons, Vietri sul Mare, Salerno, Italy, 27 May - 1 Jun 2002