Higgs boson pair production at a photon-photon collision in the two Higgs doublet model

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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16 pages, 8 figures; added Appendix with a figure

Scientific paper

10.1016/j.physletb.2009.01.050

We calculate the cross section of Higgs boson pair production at a photon collider in the two Higgs doublet model. We focus on the scenario in which the lightest CP even Higgs boson ($h$) has the standard model like couplings to the gauge bosons. We take into account the one-loop correction to the $hhh$ coupling as well as additional one-loop diagrams due to charged Higgs bosons to the $\gamma\gamma\to hh$ helicity amplitudes. It is found that the full cross section can be enhanced by both these effects to a considerable level. We discuss the impact of these corrections on the $hhh$ coupling measurement at the photon collider.

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