Rho-Like Mesons from Analysis of the Pion-Pion Scattering

Details Rho-Like Mesons from Analysis of the Pion-Pion Scattering Rho-Like Mesons from Analysis of the Pion-Pion Scattering

2007-11-29

arxiv.org/abs/0711.4748v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex, 2 figures, 12 pages; presented at the XII Int. Conf. on Hadron Spectroscopy - Hadron07 (8-13 October 2007, Frascati, It

Scientific paper

Considering analyticity, unitarity and an influence of coupled channels, experimental data on the isovector P-wave of pion-pion scattering was analyzed to study rho-like mesons below 1900 MeV. The analysis indicates evidently that in the energy range 1200--1800 MeV, there are three rho-like mesons: rho(1250), rho(1450) and rho(1600), unlike the PDG tables. The obtained P-wave pion-pion scattering length (a_1^1=33.9+- 2.02 [10^{-3}m_{pi^+}^{-3}]) most matches to the one calculated in the local Nambu--Jona-Lasinio model.

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