Dalitz plots and lineshape of $a_1(1260)$ from a relativistic three-body unitary approach

Daniel Sadasivan, Maxim Mai, Hakan Akdag +1

We formulate the final state interaction of the $a_1(1260)$ resonance decay in a manifestly three-body unitary parameterization and fit it to the $a_1(1260)$ lineshape measured by…