Question

What is fermion anomaly?

Answer 1

In physics, a chiral anomaly is theanomalous nonconservation of a chiral current. In everyday terms, it is equivalent to a sealed box that contained equal number of positive and negative charged particles, that when opened was found to have more positive than negative particles, or vice versa.

Answer 2

The parity anomaly in 2n + 1 dimensions, and the Dirac index density in 2n + 2 dimensions can be understood in terms of the physics of fermion zero.