Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-08-31
Physics
High Energy Physics
High Energy Physics - Phenomenology
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.
Asakawa Eri
Harada Daisuke
Kanemura Shinya
Okada Yasuhiro
Tsumura Koji
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