Gauge propagator and physical consistency of the CPT-even part of the Standard Model Extension
| Autor: | Paulo R. D. Pinheiro, Rodolfo Casana, A. R. Gomes, Manoel M. Ferreira |
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| Rok vydání: | 2009 |
| Předmět: |
Physics
High Energy Physics - Theory Nuclear and High Energy Physics Unitarity Isotropy Propagator FOS: Physical sciences Parity (physics) Unitary state symbols.namesake Maxwell's equations Standard-Model Extension High Energy Physics - Theory (hep-th) Quantum mechanics symbols Gauge theory Mathematical physics |
| DOI: | 10.48550/arxiv.0909.0544 |
| Popis: | In this work, we explicitly evaluate the gauge propagator of the Maxwell theory supplemented by the CPT-even term of the SME. First, we specialize our evaluation for the parity-odd sector of the tensor $W_{\mu \nu \rho \sigma}$,\ using a parametrization that retains only the three nonbirefringent coefficients. From the poles of the propagator, it is shown that physical modes of this electrodynamics are stable, non-causal and unitary. In the sequel, we carry out the parity-even gauge propagator using a parametrization that allows to work with only the isotropic nonbirefringent element. In this case, we show that the physical modes of the parity-even sector of the tensor $W$ are causal, stable and unitary for a limited range of the isotropic coefficient. Comment: revtex style, 12 pages, final version published in PRD |
| Databáze: | OpenAIRE |
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