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Electromagnetic corrections in hadronic processes

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arxiv hep-ph/0305260 v2 pith:3F2ZUVRW submitted 2003-05-23 hep-ph

J. Gasser , A. Rusetsky , I. Scimemi This is my paper · ORCID
classification hep-ph
keywords electromagneticmannermodelscalestrongtheoryanalyzecannot
verification ladder T0 review T1 audit T2 compute T3 formal
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In quantum field theory, the splitting of the Hamiltonian into a strong and an electromagnetic part cannot be performed in a unique manner. We propose a convention for disentangling these two effects: one matches the parameters of two theories -- with and without electromagnetic interactions -- at a given scale mu_1, referred to as the matching scale. This procedure enables one to analyze the separation of strong and electromagnetic contributions in a transparent manner. We illustrate the method -- in the framework of the loop expansion -- in a Yukawa model, as well as in the linear sigma model, where we also investigate the corresponding low-energy effective theory.

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Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Electromagnetic pion mass splitting using a Pauli-Villars-regulated photon propagator

    hep-lat 2026-05 unverdicted novelty 6.0 of 10

    Lattice QCD calculation of pion electromagnetic mass splitting yields 4.56(22) MeV using Pauli-Villars photon propagator on CLS ensembles, agreeing with experiment after continuum, volume, and physical-point extrapolations.

  2. Checks on QED and strong-isospin breaking corrections to $a_{\mu}^{\mathrm{HVP}}$

    hep-lat 2025-02 conditional novelty 4.0 of 10

    New cross-checks using exact derivatives, low-mode averaging, and finer ensembles confirm the earlier BMW QED and strong-isospin breaking corrections to a_mu^HVP.

  3. Hybrid calculation of hadronic vacuum polarization in muon g-2 to 0.48\%

    hep-lat 2024-07 unverdicted novelty 4.0 of 10

    Lattice QCD on finer grids yields a_μ^LO-HVP = 715.1(3.4)×10^{-10}, producing a standard-model prediction for a_μ that differs from experiment by only 0.5 sigma.

  4. FLAG Review 2024

    hep-lat 2024-11 accept novelty 2.0 of 10

    The FLAG 2024 review provides updated averages of lattice QCD determinations for quark masses, decay constants, form factors, mixing parameters, and nucleon matrix elements.

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