Résumé du preprint DAPNIA-05-343

Measurement of the CKM angle alpha at BaBar
Ch. Yèche
We present  BaBar experiment studies to measure
the CKM angle alpha of the Unitarity Triangle. 
The measurements are based on the B meson decays into the two-body state (pi,pi), the quasi two-body state (rho,rho), and the three-body state (pi+,pi-,pi0). Combining all constraints on alpha obtained at \\babar, we obtain a value
of alpha = (103 +11 -9}) degrees in good agreement with the global CKM fit using other world measurements.


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