Meson-meson scattering within one-loop chiral perturbation theory and its unitarization



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Gómez Nicola, Ángel and Peláez Sagredo, José Ramón (2002) Meson-meson scattering within one-loop chiral perturbation theory and its unitarization. Physical review D, 65 (5). ISSN 0556-2821

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We present a complete one-loop calculation of all the two-meson scattering amplitudes within the framework of SU(3) chiral perturbation theory, which includes pions, kaons, and the eta. In addition, we have unitarized these amplitudes with the coupled channel inverse amplitude method, which simultaneously ensures the good low energy properties of chiral perturbation theory and unitarity. We show how this method provides a remarkable description of meson-meson scattering data up to 1.2 GeV including the scattering lengths and the generation of seven light resonances, which is consistent with previous determinations of the chiral parameters. Particular attention is paid to discussing the differences and similarities of this work with previous analyses in the literature.

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© Amer Physical Soc.
The authors thank A. Dobado for useful comments and discussions. F. J. Ll-E thanks P. Bicudo, S. Cotanch, P. Maris, E. Ribeiro and A. Szczepaniak too. Work supported from the Spanish CICYT projects, FPA2000-0956,PB98-0782 and BFM2000-1326.

Uncontrolled Keywords:Pi-K scattering; Coupled-channel analysis; Bethe-salpeter approach; Multi-quark hadrons; Gev-c; Amplitude analysis; Momentum-transfer; Particle physics; Form-factors; Phase-shift
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:30546
Deposited On:03 Jun 2015 08:58
Last Modified:10 Dec 2018 15:10

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