Global parameterization of $\pi \pi$ scattering up to 2 GeV
High Energy Physics - Phenomenology
2019-12-18 v2 High Energy Physics - Experiment
High Energy Physics - Lattice
Nuclear Theory
Abstract
We provide global parameterizations of scattering and partial waves up to roughly 2 GeV for phenomenological use. These parameterizations describe the output and uncertainties of previous partial-wave dispersive analyses of , 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 , and pole parameters.
Keywords
Cite
@article{arxiv.1907.13162,
title = {Global parameterization of $\pi \pi$ scattering up to 2 GeV},
author = {J. R. Pelaez and A. Rodas and J. Ruiz de Elvira},
journal= {arXiv preprint arXiv:1907.13162},
year = {2019}
}
Comments
18 pages, 8 figures