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Global parameterization of $\pi \pi$ scattering up to 2 GeV

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arxiv 1907.13162 v2 pith:T72RYYRP submitted 2019-07-30 hep-ph hep-exhep-latnucl-th

classification hep-phhep-exhep-latnucl-th
keywords describeglobalparameterizationsdispersivescatteringaboveaccuratelyanalyses
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We provide global parameterizations of $\pi\pi$ scattering $S0$ and $P$ partial waves up to roughly 2 GeV for phenomenological use. These parameterizations describe the output and uncertainties of previous partial-wave dispersive analyses of $\pi\pi$, both in the real axis up to 1.12 GeV and in the complex plane within their applicability region, while also fulfilling forward dispersion relations up to 1.43 GeV. Above that energy we just describe the available experimental data. Moreover, the analytic continuations of these global parameterizations also describe accurately the dispersive determinations of the $\sigma/f_0(500)$, $f_0(980)$ and $\rho(770)$ pole parameters.

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Cited by 2 Pith papers

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

  1. $\phi \to 3\pi$ and $\phi\pi^{0}$ transition form factor from Khuri-Treiman equations

    hep-ph 2025-05 accept novelty 5.0 of 10

    A once-subtracted Khuri-Treiman analysis describes KLOE phi to 3pi and phi to pi0 gamma* data simultaneously, with a fitted subtraction constant near the sum-rule value.

  2. 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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