# simple explanation of chiral anomaly?

Can somebody provide a fairly brief explanation of what the chiral anomaly is? I have been unable to find a concise reference for this. I know QFT at the P&S level so don't be afraid to use math.

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Why don't you just start with Wikipedia for such very general intro questions? See en.wikipedia.org/wiki/Chiral_anomaly –  Luboš Motl Sep 22 '12 at 6:31