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Charge asymmetry in e^+e^-to π^+π^- process

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arxiv 2204.12235 v1 pith:EA5N7DZ2 submitted 2022-04-26 hep-ph hep-ex

Charge asymmetry in e^+e^-to π^+π^- process

classification hep-ph hep-ex
keywords asymmetrycalculationschargedataexperimentalfindpionprocess
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We consider the charge asymmetry in the differential cross section of the process $e^+e^- \rightarrow \pi^+\pi^-$. Experimental data show large deviations from the results of the available theoretical calculations. Motivated by this fact, we revisit the contribution of the two photon exchange diagrams and find the origin of discrepancy in an oversimplified account of the pion internal structure in the theoretical calculations. We present a natural and simple approach that accounts for the pion structure in a more consistent way and find remarkable agreement with the experimental data.

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Cited by 4 Pith papers

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

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

    hep-ph 2026-07 conditional novelty 6.0

    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.

  2. Radiative correction to the charge asymmetry in $e^{+}e^{-}\to\mu^{+}\mu^{-}$ process

    hep-ph 2026-05 unverdicted novelty 6.0

    Calculates NNLO QED corrections to the C-odd differential cross section in e+e−→μ+μ−, completing the analytical NNLO calculation together with a cited earlier paper.

  3. Disperon QED

    hep-ph 2025-12 unverdicted novelty 6.0

    Disperon QED is a new technique that feeds experimental data into higher-order QED loop calculations in Monte Carlo generators via dispersion relations and threshold subtraction.

  4. The anomalous magnetic moment of the muon in the Standard Model: an update

    hep-ph 2025-05 accept novelty 5.0

    The updated SM prediction for the muon anomalous magnetic moment is 116592033(62)×10^{-11}, showing no tension with the experimental average of 38(63)×10^{-11}.