Novel studies on the eta %26apos; effective lagrangian

作者：Balachandran A P^*; Govindarajan T R; de Queiroz Amilcar R

来源：The Journal of High Energy Physics, 2012, (5): 012.

DOI：10.1007/JHEP05(2012)012

• Spontaneous Symmetry Breaking
• Chiral Lagrangians
• Anomalies in Field and String Theories
• QCD

The effective Lagrangian for eta%26apos; incorporating the effect of the QCD theta-angle has been developed previously. We revisit this Lagrangian and carry out its canonical quantization with particular attention to the test function spaces of constraints and the topology of the eta%26apos;-field. In this way, we discover a new chirally symmetric coupling of this field to chiral multiplets which involves in particular fermions. This coupling violates P and T symmetries. In a subsequent paper, we will evaluate its contribution to the electric dipole moment (EDM) of fermions. Our motivation is to test whether the use of mixed states restores P and T invariance, so that EDM vanishes. This calculation will be shown to have striking new physical consequences.

• 出版日期2012-5