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Very special relativity as a background field theory

Anton Ilderton (Institutionen för fysik, Teoretisk fysik (Chalmers))
Physical Review D (2470-0010). Vol. 94 (2016), 4,
[Artikel, refereegranskad vetenskaplig]

We consider violation of Lorentz invariance in QED induced by a very high frequency background wave. An effective theory is obtained by averaging observables over the rapid field oscillations. This preserves Ward identities and restores translation invariance below the high-frequency scale, but only partial Lorentz invariance: we show that the effective theory is C-invariant SIM(2)-QED in very special relativity. Averaging leads to the nonlocal terms familiar from SIM(2) theories, while the short-distance behavior of the background field fermion propagator generates the infinite number of higher-order vertices of SIM(2)-QED.

Nyckelord: nontrivial vacuum-structure, light-cone gauge, electrodynamics, model

Denna post skapades 2016-09-28. Senast ändrad 2016-11-08.
CPL Pubid: 242463


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