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Consistency checks of pion-pion scattering data and chiral dispersive calculations



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Peláez Sagredo, José Ramón and Ynduráin, F.J. (2005) Consistency checks of pion-pion scattering data and chiral dispersive calculations. In Quark Confinement and the Hadron Spectrum VI. AIP Conference Proceedings (756). Amer Inst Physics, pp. 48-59. ISBN 0-7354-0241-8

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Official URL: http://dx.doi.org/10.1063/1.1920932


We have evaluated forward dispersion relations for scattering amplitudes that follow from direct fits to several sets of ππ scattering experiments, together with the precise K decay results, and high to energy data. We find that some of the most commonly used experimental sets, as well as some recent theoretical analyses based on Roy equations, do not satisfy these constraints by several standard deviations. Finally, we provide a consistent ππ amplitude by improving a global fit to data with these dispersion relations.

Item Type:Book Section
Additional Information:

©2005 American Institute of Physics.
ISSN: 0094-243X
Conference on Quark Confinement and the Hadron Spectrum (6. 2004. Helsinki, Finlandia).
F.J. Ynduráin is grateful to the organizing committee for the opprtunity to talk at the meeting and for financial support.

Uncontrolled Keywords:Phase-shift analysis; Gev-c; Parameters; Amplitudes; π&π
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:35497
Deposited On:04 Feb 2016 12:10
Last Modified:10 Dec 2018 15:09

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