Trilinear Higgs Boson Self-Couplings in the SM and the MSSM at ILC and CLIC Energies

GUTIERREZ-RODRIGUEZ, ALEJANDRO; HERNANDEZ-RUIZ, M.A.; SAMPAYO, OSCAR ALFREDO

The Large Hadron Collider and Higgs Boson Research

Nova Science Publishers

Año: 2011; p. 1 - 38

We study pair-production as well as the triple self-couplings of theneutral Higgs bosons of the Standard Model (SM) and the Minimal SupersymmetricStandard Model (MSSM) at the Future International Lineare+e− Collider (ILC) and Compact Linear Collider (CLIC). The analysisis based on the reactions e+e− ! b¯b HH, t¯tHH for the SM ande+e− ! b¯ bhihi, t¯thihi with hi = h,H,A for the MSSM. We evaluatethe total cross-section for both b¯ bhihi, t¯thihi and calculate the totalnumber of events considering the complete set of Feynman diagrams attree-level. We vary the triple couplings hhh, Hhh, hAA, HAA,hHH and HHH within the range  = −1 and +2. The numericalcomputation is done for the energies expected at the ILC with a centerof-mass energy 500, 1000, 1600 GeV and a luminosity 1000 fb−1. The channels e+e− ! b ¯bhihi and e+e− ! t¯thihi are also discussed to acenter-of-mass energy of 3 TeV and luminosities of 1000 fb−1 and 5000fb−1.