Decay width modeling of Higgs boson within THDM model

TL;DR

This paper calculates the decay widths of Higgs bosons in the Two-Higgs-Doublet Model, incorporating higher-order corrections and analyzing their deviations from the Standard Model, to aid in understanding potential new physics.

Contribution

It provides detailed decay width calculations for Higgs bosons in the THDM, including QCD and electroweak corrections, using Monte Carlo simulations with specific parameter scenarios.

Findings

Heavier Higgs decay width differs from SM by over 1200 times.

Decay width becomes negative when deviating from standard scenarios.

Z boson associated production dominates over W boson in cross section.

Abstract

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