Violation of the Landau-Yang theorem from infrared Lorentz symmetry breaking

Abstract

Abstract Lorentz symmetry forbids decays of massive spin-1 particle like the Z 0 into two massless photons, a result known as the Landau-Yang theorem. But it is known that infrared effects can break Lorentz invariance. Employing the construction of Mund et al. [1] which incorporated this Lorentz violation, we propose an interaction leading to the decay Z 0 → 2γ and study the dependence of the decay on the parameter of this Lorentz violation.

Keywords

• Violation of Lorentz and/or CPT Symmetry
• Scattering Amplitudes
• Gauge Symmetry