New bounds on isotropic Lorentz violation

Journal Article · Sun Oct 01 04:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.077901· OSTI ID:20871347

Carone, Christopher D; Sher, Marc ^[1]; Vanderhaeghen, Marc ^[1]

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1. Particle Theory Group, Department of Physics, College of William and Mary, Williamsburg, Virginia 23187-8795 (United States)

Violations of Lorentz invariance that appear via operators of dimension four or less are completely parametrized in the Standard Model Extension (SME). In the pure photonic sector of the SME, there are 19 dimensionless, Lorentz-violating parameters. Eighteen of these have experimental upper bounds ranging between 10{sup -11} and 10{sup -32}; the remaining parameter, k-tilde{sub tr}, is isotropic and has a much weaker bound of order 10{sup -4}. In this Brief Report, we point out that k-tilde{sub tr} gives a significant contribution to the anomalous magnetic moment of the electron and find a new upper bound of order 10{sup -8}. With reasonable assumptions, we further show that this bound may be improved to 10{sup -14} by considering the renormalization of other Lorentz-violating parameters that are more tightly constrained. Using similar renormalization arguments, we also estimate bounds on Lorentz-violating parameters in the pure gluonic sector of QCD.

• OSTI ID: 20871347
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 74; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CONSERVATION LAWS
ELECTRONS
LORENTZ INVARIANCE
MAGNETIC MOMENTS
QUANTUM CHROMODYNAMICS
RENORMALIZATION
STANDARD MODEL