Three-body unitary coupled-channel approach to radiative <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:math> decays and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1405</mml:mn><mml:mo>/</mml:mo><mml:mn>1475</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>
Physical review. D/Physical review. D.