The most correct ρ0(770) meson mass and width values
1 Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11 Bratislava, Slovak Republic
2 Department of Theoretical Physics, Comenius University, Mlynská dolina F1, 842 48 Bratislava, Slovak Republic
3 Henryk Niewodniczaňski Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Krakow, Poland
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Published online: 1 February 2019
By application of the pion electromagnetic form factor and also the P-wave isovector ππ scattering phase shift parametrizations, following from the first principles, like unitarity and analyticity, for a description of the corresponding accurate data, it is clearly demonstrated that the ρ0(770) meson mass and width values obtained by the Gounaris-Sakurai model in a description of the same data can not be accepted as correct ones.
© The Authors, published by EDP Sciences, 2019
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