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Radiative corrections to the forward-backward asymmetry in $e^+e^-\to\pi^+\pi^-$

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arxiv 2207.03495 v5 pith:ZZKBTMNS submitted 2022-07-07 hep-ph hep-exnucl-th

Gilberto Colangelo , Martin Hoferichter , Joachim Monnard , Jacobo Ruiz de Elvira This is my paper · ORCID
classification hep-phhep-exnucl-th
keywords correctionsinfraredradiativeasymmetrybeyondcalculationcancellationcase
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We present a calculation of the $C$-odd radiative corrections to $e^+e^-\to \pi^+\pi^-$ in a dispersive formalism, concentrating on the leading pion-pole contribution in the virtual box diagrams. In particular, we show how the effect of a general pion vector form factor in the loop integral can be incorporated in a model-independent way and how the cancellation of infrared singularities proceeds in this case. The numerical results, dominated by the infrared enhanced contributions, indicate significant corrections beyond scalar QED, essentially confirming recent findings in generalized vector-meson-dominance models.

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Cited by 3 Pith papers

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

  1. Radiative return at NLOPS accuracy

    hep-ph 2026-01 conditional novelty 7.0 of 10

    First implementation of NLO corrections matched to a parton shower for the radiative processes e+e−→π+π−γ and e+e−→μ+μ−γ, including ISR, FSR and their interference.

  2. Next-to-leading order FsQED corrections to radiative pion pair production

    hep-ph 2026-07 conditional novelty 6.0 of 10

    FsQED NLO structure-dependent corrections to radiative pion-pair production are at the permille (mass) to percent (angular/AFB) level, agree with GVMD, and are now in BabaYaga@NLO.

  3. Fast evaluation of Feynman integrals for Monte Carlo generators

    hep-ph 2025-07 conditional novelty 6.0 of 10

    A new numerical integrator evaluates one- and two-loop five-point Feynman integrals with complex masses in milliseconds, using variable-by-variable integration and a new branch-cut prescription.

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