It has been known that in addition to the electron mass, quantum effects anomalously break conservation of axial charge: [itex]\partial_\mu J^\mu_A = 2im\bar\psi\gamma_5\psi-\frac{g^2}{16\pi^2}\epsilon^{\mu\nu\rho\sigma}F_{\mu\nu}F_{\rho\sigma}[/itex].(adsbygoogle = window.adsbygoogle || []).push({});

Does anyone know if any experimenter has set up parallel E- and B- fields and observed this anomalous effect? If not, is it possible to observe?

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# Nonconservation of axial charge

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