Use of transverse beam polarization to probe anomalous VVH interactionsat a Linear Collider

摘要

We investigate use of transverse beam polarization in probing anomalous coupling of a Higgs boson toa pair of vector bosons, at the International Linear Collider (ILC). We consider the most general formof VVH (V = W/Z) vertex consistent with Lorentz invariance and investigate its effects on the processe+e-- f f f being a light fermion. Constructing observables with definite CP and naive time reversal(T) transformation properties, we find that transverse beam polarization helps us to improve on thesensitivity of one part of the anomalous ZZH coupling that is odd under CP. Even more importantly itprovides the possibility of discriminating from each other, two terms in the general ZZH vertex, both ofwhich are even under CP and T. Use of transverse beam polarization when combined with informationfrom unpolarized and linearly polarized beams therefore, allows one to have completely independentprobes of all the different parts of a general ZZH vertex.