First complete two-loop calculation of electron EDM and LFV decay rates μ→eγ, τ→e/μγ in the unconstrained 2HDM with general Yukawas and phases, with public Python code.
Application of the Background-Field Method to the electroweak Standard Model
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abstract
Application of the background-field method yields a gauge-invariant effective action for the electroweak Standard Model, from which simple QED-like Ward identities are derived. As a consequence of these Ward identities, the background-field Green functions are shown to possess very desirable theoretical properties. The renormalization of the Standard Model in the background-field formalism is studied. A consistent on-shell renormalization procedure retaining the full gauge symmetry is presented. The structure of the counterterms is shown to greatly simplify compared to the conventional formalism. A complete list of Feynman rules for the Standard Model in the background-field method is given for arbitrary values of a quantum gauge parameter including all counterterms necessary for one-loop calculations.
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A heat kernel plus background field method computes gauge-invariant beta functions and anomalous dimensions without diagrams by treating open and closed derivatives consistently.
S, T, U parameters are redefined for the B-LSSM using pinch technique contributions to gauge boson self-energies and expressed as functions of B-LSSM parameters, with experimental constraints applied.
Three-loop QCD corrections to electroweak radiative parameters Δρ, Δr, and Δκ are computed, yielding an updated W boson mass prediction relevant for FCC precision targets.
citing papers explorer
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Electron EDM and $\Gamma(\mu \to e \gamma)$ in the 2HDM
First complete two-loop calculation of electron EDM and LFV decay rates μ→eγ, τ→e/μγ in the unconstrained 2HDM with general Yukawas and phases, with public Python code.
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Background Fields Meet the Heat Kernel: Gauge Invariance and RGEs without diagrams
A heat kernel plus background field method computes gauge-invariant beta functions and anomalous dimensions without diagrams by treating open and closed derivatives consistently.
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$S, T, U$ Parameters in The B-LSSM
S, T, U parameters are redefined for the B-LSSM using pinch technique contributions to gauge boson self-energies and expressed as functions of B-LSSM parameters, with experimental constraints applied.
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Three loop QCD corrections to electroweak radiative parameters
Three-loop QCD corrections to electroweak radiative parameters Δρ, Δr, and Δκ are computed, yielding an updated W boson mass prediction relevant for FCC precision targets.