253 citations · 457 across the 12 of their papers we have counts for
12 papers
Quantum Chromodynamics
Gerhard Ecker
After a brief historical review of the emergence of QCD as the quantum field theory of strong interactions, the basic notions of colour and gauge invariance are introduced leading…
Generating Functional for Strong and Nonleptonic Weak Interactions
R. Unterdorfer, G. Ecker
The generating functional for Green functions of quark currents is given in closed form to next-to-leading order in the low-energy expansion for chiral SU(3), including one-loop am…
Four-pion production in e+ e- annihilation
G. Ecker, R. Unterdorfer
We calculate the processes e+ e- -> 4 pions and tau -> nu_tau + 4 pions to O(p^4) in the low-energy expansion of the standard model. The chiral amplitudes of O(p^4) can be extended…
The CP-violating asymmetry in K_L -> pi+ pi- e+ e-
G. Ecker, H. Pichl
We update the theoretical analysis of the CP-violating asymmetry in the decay K_L -> pi+ pi- e+ e-, relying on chiral perturbation theory and on the most recent phenomenological in…
Electromagnetism in nonleptonic weak interactions
G. Ecker, G. Isidori, G. Mueller +2
We construct a low-energy effective field theory that permits the complete treatment of isospin-breaking effects in nonleptonic weak interactions to next-to-leading order. To this…
eta -> pi^+ pi^- pi^0 gamma in Chiral Perturbation Theory
G. D'Ambrosio, G. Ecker, G. Isidori +1
We analyse the radiative decay in the low--energy expansion of the Standard Model. We employ the notion of ``generalized bremsstrahlung'' to take full advantage…