During my research a while ago, I have unexpectedly derived a "modified Dirac equation" with a [tex]\gamma_{5}[/tex] mass term.(adsbygoogle = window.adsbygoogle || []).push({});

[tex]

(\gamma^{\mu}\partial_{\mu}+\gamma^{5}m)\psi(x)=0

[/tex]

I was quite surprised, and went about asking a few people. The answer I got is this equation is not new and has been studied by Sakurai in the context of parity violation. Can anyone lead me to some relevant sources? Of course any comment is helpful.

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# Dirac equation with gamma_5 mass term?

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