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Technicolor and other QCD-like theories at next-to-next-to-leading order
Johan Bijnens, Jie Lu
We calculate the vacuum-expectation-value, the meson mass and the meson decay constant to next-to-next-to-leading-order in the chiral expansion for QCD-like theories with general $…
Leading Logarithms in the Massive O(N) Nonlinear Sigma Model
Johan Bijnens, Lisa Carloni
We review Buchler and Colangelo's result that leading divergences at any loop order can be calculated using only one-loop calculations and we provide an alternative proof. We then…
Chiral perturbation theory in the meson sector
Johan Bijnens
The present status of Chiral Perturbation Theory in the meson sector is discussed concentrating on recent developments. This write-up contains short discussions on a listing a few…
Determination of Low Energy Constants and testing Chiral Perturbation Theory at order (NNLO)
Johan Bijnens, Ilaria Jemos
We present the results of a search for relations between observables that are independent of the Chiral Perturbation Theory (ChPT) Next-to-Next-to-Leading Order (NNLO) Low-Energy C…
Relations at Order in Chiral Perturbation Theory
Johan Bijnens, Ilaria Jemos
We report on a search of relations valid at order in Chiral Perturbation Theory. We have found relations between , scattering, decays, masses and decay c…
Decays in SU(2) Chiral Perturbation Theory
Johan Bijnens, Alejandro Celis
We study the decays in one-loop two-flavour Chiral Perturbation Theory. We provide arguments why the calculation of the coefficient of the pionic chiral logarithm $\logm =…