DOI: 10.1103/PhysRevD.65.017302
8 citations
Résumé:

We point out that the lowest dimension operators that preserve SU(2)×U(1) gauge invariance and induce gauge boson self-interactions affecting only the neutral gauge bosons are just two dim=8 operators. If these operators constitute the only new physics source, there will then exist only two independent anomalous couplings affecting Z and γ: i.e., one CP conserving and one CP violating. On this basis, we give the corresponding relations among the ZZZ, ZZγ, and γγZ couplings used up to now in the analyses of experimental data. A reanalysis taking these relations into account should produce much more stringent constraints on the anomalous couplings.