Construction of the eta ---} 3pi (and K ---} 3pi) amplitudes using dispersive approach

Abstract

The dispersive approach based only on very general principles, unitarity, analyticity and crossing symmetry, combined with chiral counting is used to construct fully relativistic modelindependent representations of the eta and K three-pion decays valid up to and including two-loop corrections.

Keywords

• Construction
• amplitudes
• using
• dispersive
• approach