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

by Daisuke Harada

Thursday 15 Jan 2009, 11:00 → 12:00 Europe/Zurich

LAPTH Auditorium, Annecy-le-Vieux

We calculate the cross section of the lightest Higgs boson pair production at the photon linear collider in the two Higgs doublet model. We focus on the scenario in which the lightest Higgs boson has the standard model like couplings to gauge bosons. In the two Higgs doublet model, it is known that non-decoupling loop effect of extra Higgs bosons shift the hhh coupling value from the standard model by O(100)% On the other hand, gamma gamma -> hh process is an one-loop induced process and there are additional loop effects of the charged Higgs bosons in this scenario. The charged Higgs bosons also affect gam-gamma-h and gamma-gamma-h-h loop induced couplings. I will discuss the extra Higgs bosons effects of gamma gamma -> hh process and the impact of these corrections on the hhh coupling measurement at the photon linear collider. This talk is based on arXiv:0809.0094 [hep-ph].