Measurement of the UT angle phi_2

Abstract

We give a status report on measurements of the angle phi_2 (alpha) of the CKM unitarity triangle (UT) and the so-called Kpi puzzle. Results presented are mostly from the two B-factory experiments, Belle and BaBar.

Comments: 10 pages, 7 figures, 2 tables, Proceedings of the Ninth International Conference on Flavor Physics and CP Violation (FPCP 2011), Maale Hachamisha, Israel, May 23-27, 2011