Jun 13 – 17, 2011
Europe/Berlin timezone
Proceedings are now available online at <a href="http://www.slac.stanford.edu/econf/C110613/">eConf</a>

Precise dispersive analysis of the f0(600) and f0(980) resonances from pion-pion scattering.

Jun 14, 2011, 6:20 PM
1h 10m
Millerzimmer (Künstlerhaus)



poster Poster Session Poster Session


Mr Jacobo Ruiz de Elvira (Universidad Complutense)


We extend the precise analysis of presently available pion-pion scattering data up to 1.1 GeV published in Phys.Rev.D83:074004,2011, by means of once subtracted Roy-like dispersion relations, twice subtracted Roy Equations, and Forward Dispersion Relations. The use of once-subtracted dispersion relations is essential to reduce uncertainties in the region around the K-Kbar threshold, whereas in the very low energy regime the strongest constraint comes from the standard Roy Eqs. Forward dispersion relations provide constraints up to roughly 1.4 GeV. Our results provide a precise and model independent description of the $f_0(600)$ and $f_0(980)$ regions together. In particular we show that the "dip-solution" for the elasticity is strongly preferred over the "non-dip" solution. We also provide final results for the resonance associated poles.

Primary author

Mr Jacobo Ruiz de Elvira (Universidad Complutense)


Prof. J. Ramón Peláez (Universidad Complutense) Dr Robert KAMINSKI (Institute of Nuclear Physics Polish Academy of Sciences) Mr Rubén GARCIA MARTIN (Universidad Complutense)

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