Summary
This theoretical physics paper extends a previously developed dispersive evaluation framework for hadronic light-by-light contributions to anomalous magnetic moments, originally applied to muons, to the electron and tau lepton. By adapting the kinematic approach to account for the differing masses of these leptons, the authors calculate and report the HLbL contributions with quantified uncertainties. The work contributes to precision tests of the Standard Model through improved calculations of fundamental lepton properties.
UK applicability
This paper is a fundamental theoretical physics contribution with no direct applicability to UK farming systems, soil health, nutrient density, or agricultural practice. It falls outside the scope of Vitagri's research focus.
Key measures
Anomalous magnetic moment contributions (a_e^HLbL and a_τ^HLbL); hadronic light-by-light scattering contributions; loop integral sensitivities at different momentum scales
Outcomes reported
The study calculated hadronic light-by-light (HLbL) contributions to the anomalous magnetic moments of the electron and tau lepton using a dispersive evaluation approach. Results obtained a_e^HLbL = 3.51(23) × 10^−14 and a_τ^HLbL = 3.77(29) × 10^−8, with associated uncertainties propagated across various contributions.
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