Global parameterization of ππ scattering up to 2 GeV

ππ散射的全局参数化,能量最高可达2 GeV

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Abstract

We provide global parameterizations of ππ → ππ 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 ππ → ππ , 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 σ/f0(500) , f0(980) and ρ(770) pole parameters.

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