Bounds on Higgs and Gauge--Boson Interactions from LEP2 Data

Details Bounds on Higgs and Gauge--Boson Interactions from LEP2 Data Bounds on Higgs and Gauge--Boson Interactions from LEP2 Data

1998-02-24

arxiv.org/abs/hep-ph/9802408v1

Phys.Lett. B434 (1998) 340-346

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages Latex file using RevTeX, 3 figures as .eps files

Scientific paper

10.1016/S0370-2693(98)00752-7

We derive bounds on Higgs and gauge--boson anomalous interactions using the LEP2 data on the production of three photons and photon pairs in association with hadrons. In the framework of $SU(2)_L \otimes U(1)_Y$ effective Lagrangians, we examine all dimension--six operators that lead to anomalous Higgs interactions involving $\gamma$ and $Z$. The search for Higgs boson decaying to $\gamma\gamma$ pairs allow us to obtain constrains on these anomalous couplings that are comparable with the ones originating from the analyses of $p\bar{p}$ collisions at the Tevatron. Our results also show that if the coefficients of all ``blind'' operators are assumed to have same magnitude, the indirect constraints on the anomalous couplings obtained from this analyses, for Higgs masses $M_H \lesssim$ 140 GeV, are more restrictive than the ones coming from the $W^+W^-$ production.

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