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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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Cited by 6 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. Isospin-breaking corrections to the muon magnetic anomaly in Lattice QCD

    hep-lat 2019-09 conditional novelty 4.0 of 10

    A first-principles lattice calculation with Nf=2+1+1 QCD plus quenched QED gives the leading isospin-breaking correction to the muon HVP as 7.1 (2.9) x 10^-10, the most precise such estimate to date.

  5. 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.

  6. Hadronic atoms

    hep-ph 2024-12 unverdicted novelty 1.0 of 10

    A pedagogical survey of non-relativistic effective field theory for hadronic atoms, restating the known next-to-leading-order formulas for the pionic hydrogen energy shift and width.

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