Cherenkov radiation with massive,CPT-violating photons
| Autor: | Don Colladay, Robertus Potting, Patrick McDonald |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
High Energy Physics - Theory
Physics Photon 010308 nuclear & particles physics Canonical quantization Lorentz transformation FOS: Physical sciences Position and momentum space 01 natural sciences symbols.namesake High Energy Physics - Theory (hep-th) Standard-Model Extension Quantum electrodynamics 0103 physical sciences symbols Vector field Covariant transformation 010306 general physics Cherenkov radiation |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.93.125007 |
| Popis: | The source of CPT-violation in the photon sector of the Standard Model Extension arises from a Chern-Simons-like contribution that involves a coupling to a fixed background vector field $k_{AF}^\mu$. These Lorentz- and CPT-violating photons have well-known theoretical issues that arise from missing states at low momenta when $k_{AF}^\mu$ is timelike. In order to make the theory consistent, a tiny mass for the photon can be introduced, well below current experimental bounds. The implementation of canonical quantization can then be implemented as in the CPT-preserving case by using the St\"uckelberg mechanism. We explicitly construct a covariant basis of properly-normalized polarization vectors at fixed three-momentum satisfying the momentum space field equations, in terms of which the vector field can be expanded. As an application of the theory, we calculate the Cherenkov radiation rate for the case of purely timelike $k_{AF}^\mu$, and find a radiation rate at high energies that has a contribution that does not depend on the mass used to regulate the photons. |
| Databáze: | OpenAIRE |
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