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As part of the search for new physics beyond the Standard Model, we chose thedetermination of the Higgs boson decay width as one of the least experimentallydetermined values. The decay widths into the four fermions of the lightest andheaviest CP-even Higgs bosons of the THDM model were calculated, taking intoaccount QCD and electroweak corrections in the NLO approximation. To achievethis goal, the program Monte Carlo Prophecy 4f with special scenarios ofparameters, 7B1 and 5B1 were used. It was found that the decay width of theheavier CP-even Higgs boson, H differs from H$_{SM}$ by 1227.93 times andchanges to a negative value when deviating from the standard scenarios. Scalefactors k$^2_{Z}$ and k$^2_{W}$ showed the predominance of the associated withZ boson production cross section of CP-even Higgs boson over the associatedwith W production cross section.

Decay width modeling of Higgs boson within THDM model