Measurements of the angle α(ϕ2) at BaBar

Measurements of the angle α ( ϕ 2 ) of the Unitarity Triangle from the BaBar experiment are presented. The measurements are based on about 230 million B B ¯ pairs where one B meson decays into two pions, two rhos, or three pions (Dalitz analysis). These three measurements yield a combined value of α = ( 103 −9 +11 ) ° .