Renormalizability and model-independent description
signals at low energies
Dniepropetrovsk State University, 49050 Dniepropetrovsk, Ukraine
Received: 4 July 2000 / Published online: 23 October 2000 - © Springer-Verlag 2000
The model-independent search for signals of heavy gauge bosons in low-energy four-fermion processes is analyzed. It is shown that the renormalizability of the underlying theory containing , formulated as a scattering in the field of heavy virtual states, can be implemented in specific relations between different processes. Considering the two-Higgs-doublet model as the low-energy basis theory, the two types of interactions with light particles are found to be compatible with the renormalizability. They are called the Abelian and the "chiral'' couplings. Observables giving the possibility to uniquely detect in both cases are introduced.
Copyright Società Italiana di Fisica, Springer-Verlag 2000