2012/09/06 by Jose R. Pelaez, J. R. Peláez, Pelaez, Jose R. +9
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.48550/arxiv.1209.1241
To appear in the Proceedings of the VI International Conference on Quark and Nuclear Physics, Palaiseau, France, April 2012. 6 pages
arxiv created 2012/09/06 · arxiv updated 2012/09/07
We review our recent dispersive and model independent determination of the lightest two scalars, in terms of poles and residues - or mass, width and coupling- by means of once and twice subtracted Roy equations, using as input constrained fits to data, including the most recent ones from Kl4 decays. We find the f0(600) pole at (457+14-13)-i(279+11-7) MeV and that of the f0(980) at (996+-7)-i(25+10-6) MeV, whereas their respective couplings to two pions are 3.59+0.11-0.13 GeV and 2.3+-0.2 GeV.