Measurement of alpha/phi2 in Bo --> pi pi, rho pi and rho rho
  We present a summary of the measurements of the CKM angle, alpha (phi2), performed by the BaBar and Belle experiments which collect BBbar pairs at the Y(4S) resonance produced in asymmetric e+ e- collisions. We discuss the measurements of the branching fractions and CP asymmetries in the B --> pi pi, rho pi and rho rho final states that lead to constraints on alpha (phi2). 
J. Dalseno (the Belle Collaboration)
hep-ex