Results on \phi 2 from e+e- colliders

Abstract

We present a summary of measurements sensitive to the CKM angle \phi 2 (\alpha), performed by the BaBar and the Belle experiments which both collect B\bar{B} pairs produced at the \Upsilon(4S) resonance in asymmetric e+e- collisions. We discuss the decays B -> \pi \pi, \rho\rho, a_1\pi and (\rho\pi)^0. The CP asymmetries, branching fractions and polarizations obtained are used to constrain \phi 2.

Comments: Presented at the 2013 Flavor Physics and CP Violation (FPCP-2013), Buzios, Rio de Janeiro, Brazil, May 19-24 2013, 12 pages, 8 figures