English

Beyond QED: Electroweak and hadronic extensions of McMule

High Energy Physics - Phenomenology 2026-03-11 v1

Abstract

McMule is a Monte Carlo framework developed to advance the low-energy precision frontier by providing QED corrections to leptonic scattering and decay processes, currently up to next-to-next-to-leading order. Recent developments have extended its capabilities in two important directions: the systematic inclusion of electroweak effects at low energies within the low-energy effective field theory [arXiv:2507.17652], and the incorporation of pion form factors and the non-perturbative hadronic vacuum polarisation in loop amplitudes through a combination of OpenLoops and effective field theory techniques, referred to as disperon QED [arXiv:2512.10709]. I will provide an overview of McMule and discuss these recent extensions and their applications. In particular, I will illustrate the impact of the model used for non-perturbative γ\gamma-ZZ mixing effects in the context of the MOLLER experiment and highlight the subtlety involved in consistently aligning OpenLoops with its effective field theory expansion in disperon QED.

Keywords

Cite

@article{arxiv.2603.09443,
  title  = {Beyond QED: Electroweak and hadronic extensions of McMule},
  author = {Sophie Kollatzsch},
  journal= {arXiv preprint arXiv:2603.09443},
  year   = {2026}
}

Comments

11 pages, 3 figures, contribution to the 17th International Symposium on Radiative Corrections: Applications of Quantum Field Theory to Phenomenology (RADCOR2025), 5-10 October 2025, Puri, India

R2 v1 2026-07-01T11:12:13.099Z