Anomalous decays of mesons: surface terms against πa1-mixing


Seminar “Quantum Field Theory”

Date and Time: Wednesday, 20 May 2020, at 11:00 AM

Venue: Online conference in Zoom, Bogoliubov Laboratory of Theoretical Physics

Seminar topic: «Anomalous decays of mesons: surface terms against πa1-mixing»

Speaker: A. A. Osipov


The amplitudes of anomalous decays of mesons are affected by mixing between members of pseudoscalar JPC=0-+ and axial-vector 1++ nonets that violates some low-energy theorems. We show that a gauge covariant procedure to diagonalize this mixing allows for consistent description of the amplitudes. The crucial role of the surface terms associated with the quark triangle diagrams is clarified.