Answer to Question #90604 in Field Theory for Vasiliy

Question #90604
How would psi_bar gamma_mu psi transform under parity transformation?
1
Expert's answer
2019-06-06T10:09:23-0400
"P( \\bar{\\psi} \\gamma_\\mu \\psi) =\\bar{\\psi} \\gamma_0 \\gamma_\\mu \\gamma_0 \\psi= (\\bar{\\psi} \\gamma_\\mu \\psi) \\epsilon^\\mu"

where

"\\epsilon^\\mu =1\\space for \\space \\mu=0 \\space and -1\\space for \\mu = 1,2,3"


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