Higgs Boson Self-Coupling at High Energy $\gamma \gamma$ Collider

Abstract

We analyzed the double production and the triple self-coupling of the standard model Higgs boson at future $\gamma \gamma$ collider energies, with the reactions $\gamma \gamma \to f\bar{f}HH$ $(f=b,t)$. We evaluated the total cross section for $f\bar{f}HH$ and calculated the total number of events considering the complete set of Feynman diagrams at tree-level and for different values of the triple coupling $\kappa {\lambda }_{HHH}$. We have also analyzed the sensitivity for the considered reaction and we show the results as 95% C.L. regions in the $\kappa -M_H$ plane for different values of the center of mass energy and different levels of background. The numerical computation was done for the energies which are expected to be available at a possible Future Linear $\gamma \gamma$ Collider with a center-of-mass energy 500-3000 $GeV$ and luminosities of 1 and $5a{b}^{-1}$. We found that the number of events for the process $\gamma \gamma \to t\bar{t}HH$, taking into account the decay products of both $t$ and $H$, is small but enough to obtain information on the triple Higgs boson self-coupling in a independent way, complementing other studies on the triple vertex.

14 pages, 6 figures

References in corpus (2)

• The Triple Higgs Boson Self-Coupling at Future Linear e+e- Colliders Energies: ILC and CLIC
• Measuring the Higgs Boson Self-coupling at High Energy e^+e^- Colliders

Cited by in corpus (1)

• Measuring Higgs self couplings in the presence of VVH and VVHH at the ILC