Abstract
We consider the production of a single Standard Model (SM) Higgs boson (h^0) in association with a photon at the future Linear collider (LC) in the context of a type-II seesaw model. The type-II seesaw model extends the SM particle content by adding one triple Higgs where its Higgs coupling is a key parameter of the scalar potential triggering the electroweak symmetry-breaking mechanism in the SM. It is a well motivated model since it provides neutrino masses and mixing. The LC presents a particularly interesting possibility to probe Higgs couplings due to the clean beams in the initial state. We study the one loop processes e^+e^- rightarrow h^0gamma and e^-gamma rightarrow e^- h^0, we show that it is possible to correlate the total cross section predictions with the couplings h^0gamma gamma and h^0gamma Z which are sensitive to the presence of singly and doubly charged Higgs. For parameter points allowed by the current experimental constraints, our numerical results show that the effect of H^pm and H^{pm pm } can be as large as ± 25% with respect to the SM predictions. For both processes, we also present differential cross section for different center of mass energy.
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