Problems with Lorentz violation originating from a cosmologically varying pseudoscalar field
| Autor: | Sapan Karki, Brett Altschul |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
High Energy Physics - Theory
Power series Electromagnetic field Physics Field (physics) 010308 nuclear & particles physics Lorentz transformation High Energy Physics::Phenomenology FOS: Physical sciences Charge (physics) 01 natural sciences Pseudoscalar High Energy Physics::Theory symbols.namesake Singularity High Energy Physics - Theory (hep-th) Quantum electrodynamics 0103 physical sciences symbols Gravitational singularity 010306 general physics |
| Zdroj: | Physical Review |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.102.035009 |
| Popis: | Lorentz- and CPT-violating models of electrodynamics with Chern-Simons terms are typically plagued by various sorts of instabilities. However, when the Chern-Simons term arises from a slow time variation in a pseudoscalar field with an axion-like electromagnetic coupling, the total energy of the theory is bounded below. We examine the behavior of such a theory, finding that in a systematic power series expansion of the magnetic and pseudoscalar fields, singularities appear in the field profiles. Some of the questionable behavior can be cured by taking a fully nonperturbative approach, but other problematic terms remain. This may be an indication that Cerenkov-like radiation will automatically carry away energy from a moving charge, preventing a charge from moving with uniform velocity over extended distances. 20 pages |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|