Tuesday, August 21, 2012

1208.3823 (Riazuddin)

Parity anomaly in Dirac equation in (1+2) dimensions, quantum
electrodynamics and pair production

It is shown that parity operator plays an interesting role in Dirac equation in (1+2) dimensions and can be used for defining chiral currents. It is shown that the "anomalous" current induced by an external gauge field can be related to the anomalous divergence of an axial vector current which arises due to quantum radiative corrections provided by triangular loop Feynman diagrams in analogy with the corresponding axial anomaly in (1+3) dimensions. It is shown that the non-conservation of "chiral charge" due to anomaly is related with the topological Chern-Simone charge. As an application pair creation of massless fermions is discussed in electric field.
View original: http://arxiv.org/abs/1208.3823

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