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Violation of the Landau-Yang theorem from Infrared Lorentz Symmetry Breaking (2304.11008v2)
Published 20 Apr 2023 in hep-ph and hep-th
Abstract: Lorentz symmetry forbids decays of massive spin-1 particle like the $Z0$ 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. \cite{MRS} which incorporated this Lorentz violation, we propose an interaction leading to the decay $Z0 \rightarrow 2 \gamma$ and study the dependence of the decay on the parameter of this Lorentz violation.
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