Measurements of the CKM angle \phi_1(\beta) at the B Factories

Understand

In this proceeding, we report the recent measurements of the CKM angle \phi_1(\beta) using large data samples collected by the Belle and BaBar experiments.

• The experiments have collected more than 1 billion B anti-B pairs of data sample at the \Upsilon(4S) resonance using the facilities of the asymmetric-energy e+e- colliders KEKB and PEP-II.