Anomalies in B-decays and U(2) flavor symmetry Riccardo Barbieri, Gino Isidori, Andrea Pattori and Fabrizio Senia Eur. Phys. J. C, 76 2 (2016) 67 Published online: 08 February 2016 DOI: 10.1140/epjc/s10052-016-3905-3