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Abstract.This contribution summarizes the work explained in arXiv:hep-ph/0608290 where we perform a non-perturbative chiral study of the masses of the lightest pseudoscalar mesons. The pseudoscalar… (More)
Here we take the point of view of calculating perturbatively in an EFT the discontinuity of a PWA along the LHC, that we denoted above as \(\varDelta (p^2)\). Once \(\varDelta (p^2)\) is approximated… (More)
We report on a dispersion relation for the γγ→(ππ)I S‐wave in isospin I emphasizing the low energy region. The f0(980) signal that emerges in γγ→ππ is also discussed. Our results could be used to… (More)