Vacuum Cherenkov radiation in quantum electrodynamics with high-energy Lorentz violation

Journal Article · Tue Mar 01 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.056010· OSTI ID:21537468

Anselmi, Damiano ^[1]; Taiuti, Martina ^[2]

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1. Institute of High Energy Physics, Chinese Academy of Sciences, 19 (B) Yuquanlu, Shijingshanqu, Beijing 10049 (China)
2. Dipartimento di Fisica 'Enrico Fermi', Universita di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa (Italy)

We study phenomena predicted by a renormalizable, CPT invariant extension of the standard model that contains higher-dimensional operators and violates Lorentz symmetry explicitly at energies greater than some scale {Lambda}{sub L}. In particular, we consider the Cherenkov radiation in vacuo. In a rather general class of dispersion relations, there exists an energy threshold above which radiation is emitted. The threshold is enhanced in composite particles by a sort of kinematic screening mechanism. We study the energy loss and compare the predictions of our model with known experimental bounds on Lorentz violating parameters and observations of ultrahigh-energy cosmic rays. We argue that the scale of Lorentz violation {Lambda}{sub L} (with preserved CPT invariance) can be smaller than the Planck scale, actually as small as 10{sup 14}-10{sup 15} GeV. Our model also predicts the Cherenkov radiation of neutral particles.

• OSTI ID: 21537468
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevD.83.056010; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHERENKOV RADIATION
COMPARATIVE EVALUATIONS
COSMIC RADIATION
CPT THEOREM
DISPERSION RELATIONS
ENERGY LOSSES
FORECASTING
LORENTZ INVARIANCE
NEUTRAL PARTICLES
QUANTUM ELECTRODYNAMICS
STANDARD MODEL
SYMMETRY
ELECTRODYNAMICS
ELECTROMAGNETIC RADIATION
EVALUATION
FIELD THEORIES
GRAND UNIFIED THEORY
INVARIANCE PRINCIPLES
IONIZING RADIATIONS
LOSSES
MATHEMATICAL MODELS
PARTICLE MODELS
QUANTUM FIELD THEORY
RADIATIONS
UNIFIED GAUGE MODELS