Anomaly for Majorana fermion?
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In 4-spacetime dimension, is there U(1) gauge field chiral anomaly associated with Majorana fermion (or I am not sure if it is equivalent, majorana representation)? Besides, I have read from several papers that there are gravitational chiral anomaly associated with both Dirac fermion and Majorana fermion. The only difference is the 1/2 factor in front of the anomaly term. Where does this difference appear in Fujikawa's chiral rotation method?
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