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Tension between $e^+e^-\to\eta\pi^-\pi^+$ and $\tau^-\to\eta\pi^-\pi^0\nu_\tau$ data and non-standard interactions

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arxiv 2209.15537 v2 pith:TQTXBBJX submitted 2022-09-30 hep-ph

classification hep-ph
keywords interactionsnon-standardbellebeyondcannotcollaborationscontributionscross-section
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We show the discrepancy between the isospin-rotated $e^+e^-\to\eta\pi^-\pi^+$ cross-section -- measured by various collaborations -- and the Belle $\tau^-\to\eta\pi^-\pi^0\nu_\tau$ spectrum, which cannot be explained by heavy new physics non-standard interactions. We give for the first time the framework needed to study these beyond the standard model contributions in three-meson tau decays.

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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. Electroweak precision physics via angular distributions in hadronic $\tau$ decays

    hep-ph 2026-06 unverdicted novelty 7.0 of 10

    Angular moments in two-pseudoscalar tau decays give form-factor-independent SM relations that tensor new physics and scalar mass effects can break.

  2. Unified study of two-meson and axion-meson production from semileptonic tau decays within resonance chiral framework

    hep-ph 2025-07 conditional novelty 6.0 of 10

    Within a resonance chiral model, hadron resonances boost predicted tau decays into pion/K plus axion by factors of 7.5 and 19.2, with branching ratios and forward-backward asymmetries also predicted.

  3. CP violation studies at Super Tau-Charm Facility

    hep-ex 2025-02 conditional novelty 4.0 of 10

    A future Super Tau-Charm Facility is projected to test CP violation in hyperon, tau, and charm decays at 1e-4 to 1e-3 sensitivities and improve the kaon CPT mass-difference limit tenfold.

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