Anomalous anomalies from virtual black holes

TL;DR

This paper examines how different IR cutoff choices in gravitational UV/IR mixing models affect predictions for lepton magnetic moments, using muon data to exclude certain models and suggest possible observable effects.

Contribution

It analyzes the impact of IR cutoff definitions on gravitational UV/IR mixing models and their predictions for lepton magnetic moments, providing experimental constraints.

Findings

Excluded models with spherical IR cutoff based on muon data.

Suggested that simply-connected volume IR cutoff may explain observed muon magnetic moment deviations.

Provided bounds on UV/IR mixing models using experimental data.

Abstract

We investigate gravitational UV/IR mixing models that predict a breakdown of low energy effective field theory, from loop-level, non-local gravitational corrections to particle processes. We determine how the choice of IR cutoff in these theories alters predictions for lepton magnetic moments. Using Brookhaven E821 muon magnetic moment data, we exclude models of UV/IR mixing with an IR cutoff set by a spherical volume enclosing the experiment. On the other hand, an IR cutoff defined by the simply-connected spatial volume containing the trajectories of the muons, implies a correction to the muon magnetic moment which may have already been observed.