https://doi.org/10.1051/epjconf/20123708004
Precise determination of the parameters of resonances f0(500) and f0(980) by fitting the data and dispersion relations
1 Institute of Nuclear Physics PAN, Kraków, Poland
2 Universidad Complutense de Madrid, Spain
a e-mail: robert.kaminski@ifj.edu.pl
The long-standing puzzle in the parameters of the f0(500), as well as the f0(980), is finally being settled [1] thanks to precise dispersive analyses carried out during the last years. Here we report on our very recent dispersive data analysis which allowed for a precise and model independent determination of the amplitudes for the S, P, D and F waves [2–4]. The analytic continuation of once subtracted dispersion relations for the S0 wave to the complex energy plane leads to very precise results for the f0(500) pole: √spole = 457-13+14 - i279-7+11 MeV and for the f0(980) pole: √spole = 996 ± 7 - i25-6+10 MeV.
© Owned by the authors, published by EDP Sciences, 2012
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