How Big Can Anomalous W Couplings Be?

Details How Big Can Anomalous W Couplings Be? How Big Can Anomalous W Couplings Be?

1993-12-07

arxiv.org/abs/hep-ph/9312238v2

Z.Phys.C70:145-158,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

40 pages, 11 figures, (dvi file and figures combined into a uuencoded compressed file), (We correct an error in eq. 39 and its

Scientific paper

10.1007/s002880050092

Conventional wisdom has it that anomalous gauge-boson self-couplings can be at most a percent or so in size. We test this wisdom by computing these couplings at one loop in a generic renormalizable model of new physics. (For technical reasons we consider the CP-violating couplings here, but our results apply more generally.) By surveying the parameter space we find that the largest couplings (several percent) are obtained when the new particles are at the weak scale. For heavy new physics we compare our findings with expectations based on an effective-lagrangian analysis. We find general patterns of induced couplings which robustly reflect the nature of the underlying physics. We build representative models for which the new physics could be first detected in the anomalous gauge couplings.

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