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# $\pi\pi$ Amplitudes Fitted to Experimental Data and to Roy's Equations

Abstract : The scalar-isoscalar, scalar-isotensor and vector-isovector pi-pi amplitudes are fitted simultaneously to experimental data and to Roy's equations. The resulting amplitudes are compared with those fitted only to experimental data. No additional constraints for the pi-pi threshold behaviour of the amplitudes are imposed. Threshold parameters are calculated for the amplitudes in the three waves. Spectrum of scalar mesons below 1.8 GeV is found from the analysis of the analytical structure of the fitted amplitudes.
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Conference papers
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http://hal.in2p3.fr/in2p3-00150097
Contributor : Dominique Girod <>
Submitted on : Tuesday, May 29, 2007 - 2:41:01 PM
Last modification on : Friday, April 10, 2020 - 5:06:53 PM

### Citation

R. Kaminski, L. Lesniak, B. Loiseau. $\pi\pi$ Amplitudes Fitted to Experimental Data and to Roy's Equations. 8th International Workshop on Meson Production, Properties and Interaction (MESON 2004), Jun 2004, Krakow, Poland. pp.693-695, ⟨10.1142/S0217751X05022184⟩. ⟨in2p3-00150097⟩

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