Investigations of electroweak symmetry breaking mechanism for Higgs boson decays into four fermions

• Дата: 2020
• Автори: Obikhod, T.V., Petrenko, E.A.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2020
• Назва видання: Вопросы атомной науки и техники
• Теми: Nuclear physics and elementary particles
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/194557
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Investigations of electroweak symmetry breaking mechanism for Higgs boson decays into four fermions / T.V. Obikhod, E.A. Petrenko // Problems of atomic science and tecnology. — 2020. — № 5. — С. 8-12. — Бібліогр.: 12 назв. — англ.

Models with extended Higgs boson sectors are of prime importance for investigating the mechanism of electroweak symmetry breaking for Higgs decays into four fermions and for Higgs-production in association with a vector bosons. In the framework of the Two-Higgs-Doublet Model using two scenarios obtained from the experimental measurements we presented next-to-leading-order results on the four-fermion decays of light CP-even Higgs boson, h → 4f. With the help of Monte Carlo program Prophecy 4f 3.0, we calculated the values Γ = ΓEW/(ΓEW + ΓSM) and Γ = ΓEW+QCD/(ΓEW+QCD + ΓSM) for Higgs boson decay channels H → νµµee, µµee, eeee. We didn’t find significant difference when accounting QCD corrections to EW processes in the decay modes of Higgs boson. Using computer programs Pythia 8.2 and FeynHiggs we calculated the following values: σ(VBH)BR(H → ZZ) and σ(VBF)BR(H → WW) for VBF production processes, σ(ggH)BR(H → WW) and σ(ggH)BR(H → ZZ) for gluon fusion production process at 13 and 14 TeV and found good agreement with experimental data.