The study of the extended Higgs boson sector within 2HDM model

Consideration of the latest experimental data on the searches for extended sector of Higgs bosons produced at the LHC at a center-of-mass energy of 13 TeV, allows for computer modeling of the properties of supersymmetric particles within 2HDM model. The experimental restrictions on model parameters accounted in FeynHiggs code that is implemented in SusHi program, gave us the possibility to calculate the cross sections and branching fractions for three mechanisms of production and decay of Higgs bosons: 1) pp$\rightarrow H\rightarrow\tau\tau$, 2) pp$\rightarrow A\rightarrow Zh\rightarrow llbb$, 3) pp$\rightarrow H\rightarrow hh\rightarrow bb\tau\tau$ at a center-of-mass energy of 14 TeV. The considered computer modelling make it possible to draw conclusions about the need to take into account the b-associated production process of Higgs bosons for fermionic decay channel at large values of tan$\beta$. Differential cross sections with respect to the Higgs transverse momentum $p_t$ and pseudorapidity $\eta$ are calculated and the peculiarities of the kinematics of the Higgs boson decay products are recognized.Comment: 18 pages, 14 figures, presented at XV Conference of High energy physics, Kharkov, 21-24 March, 201

Kyiv environmental safety financing: problems and ways of their overcoming

The state of natural-technogenic and environmental safety of Kyiv is extremely complicated. The natural component of the hazard is caused, primarily, by the complex relief. Thus, among natural threats and risks are landslide processes, flooding, complex meteorological phenomena, etc. The relatively small territory of the city is oversaturated with complex engineering structures and production (radiation, chemical, hydrodynamic, explosion fire hazard) and has one of the highest population density. At the risk of emergency situation (ES) there will be a few million people in the affected area. According to the State Service of Emergencies of Ukraine, during 2014 the death toll as a result of emergencies accounted for 3 people and 33 people suffered. In 2013 there were 7 ES, the number of sufferers and dead were 95 and 3 people, respectively

Environmental safety as a priority factor of international relations under the conditions of globalization: parity basis and principles of formation

The article examines prerequisites for the formation of the global environmental safety as an integral part of international relations and politics against the background of the long-term ecological crisis. Features of the global environmental safety and levels of its operation on a territorial basis are singled out and grounded. Attention is focused on transboundary character of the manifestation of most environmental threats and hazards, making it impossible for countries to overcome the consequences on their own. Emphasized are global threats and hazards that will determine areas of cooperation in the global environmental safety in the near future. Parity basis and principles of formation of global ecologically safe space are outlined. Considering the world experience of the implementation of forms and methods of economical use of natural resources and observance of safety of existence, directions of strategic planning of national environmental safety are suggested.Розкриваються передумови становлення глобальної екологічної безпеки як невід’ємної частини міжнародних відносин та політики на фоні довготривалої екологічної кризи. Виділяються та обґрунтовуються характерні ознаки глобальної екологічної безпеки та рівні її функціонування за територіальним принципом. Акцентується увага на транскордонності прояву більшості екологічних загроз та небезпек, що унеможливлює подолання наслідків державами самостійно. Виділено глобальні загрози та небезпеки, що визначатимуть у найближчій перспективі напрями співпраці у світовій екологічній безпеці. Окреслюються паритетні засади та принципи формування глобального екологобезпечного простору. Виходячи із світового досвіду форм і методів ощадливого використання природних ресурсів та дотримання безпеки існування, запропоновано напрями стратегічного планування національної екологічної безпеки

Studying the resonance production cross-section of the heavy vectors within Heavy Vector Triplet model

In the context of TeV-scale extensions of the Standard Model both the experimental searches and the construction of phenomenological models for the new heavy bosons searches are used by us. Heavy particles predicted by a the Simplified Model constructed to describe only the on-shell resonance, have to be compared with LHC data. Heavy bosons have certain properties that can be calculated within the Heavy Vector Triplet model using the MadGraph computer program. We have calculated the production cross sections of heavy particles using the experimental constraints in the parameter space ($c_H$, $c_F$) imposed on the benchmark scenario. The nature of the functional dependence of the cross section at the basic parameters of the model on the mass of the new boson, as well as the mechanism for the heavy particle production is studied.Comment: 9 pages, 9 figure

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

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, $h \rightarrow 4f$. With the help of Monte Carlo program Prophecy 4f 3.0, we calculated the values $\Gamma= \Gamma_{EW} /\left(\Gamma_{EW}+\Gamma_{SM}\right)$ and $\Gamma= \Gamma_{EW+QCD} /\left(\Gamma_{EW+QCD}+\Gamma_{SM}\right)$ for Higgs boson decay channels $H \rightarrow \nu_{\mu} \overline{\mu} e \overline{\nu_e}$, $\mu \overline{\mu} e \overline{e}$, $e \overline{e} e \overline{e}$. 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: $\sigma(VBH)BR(H\rightarrow ZZ)$ and $\sigma(VBF)BR(H \rightarrow WW)$ for VBF production processes, $\sigma(ggH)BR(H \rightarrow WW)$ and $\sigma(ggH)BR(H \rightarrow ZZ)$ for gluon fusion production process at 13 and 14 TeV and found good agreement with experimental data.Comment: 4 pages, 2 figure

Kyiv environmental safety financing: problems and ways of their overcoming

The state of natural-technogenic and environmental safety of Kyiv is extremely complicated. The natural component of the hazard is caused, primarily, by the complex relief. Thus, among natural threats and risks are landslide processes, flooding, complex meteorological phenomena, etc. The relatively small territory of the city is oversaturated with complex engineering structures and production (radiation, chemical, hydrodynamic, explosion fire hazard) and has one of the highest population density. At the risk of emergency situation (ES) there will be a few million people in the affected area. According to the State Service of Emergencies of Ukraine, during 2014 the death toll as a result of emergencies accounted for 3 people and 33 people suffered. In 2013 there were 7 ES, the number of sufferers and dead were 95 and 3 people, respectively

Searches for Massive Graviton Resonances at the LHC

The Standard Model problems lead to the new theories of extra dimensions: Randall-Sundrum model, Arkani-Hamed-Dimopoulos-Dvali model, and TeV-1 model. In the framework of these models, with the help of computer program Pythia8.2, the production cross sections for Kaluza-Klein particles at various energies at the LHC were calculated. The generation of monojet events from scalar graviton emission was considered for number of extra dimensions (n=2, 4, and 6) for the energy at the LHC 14 TeV. The graviton production processes through the gluon-gluon, quark-gluon, and quark-quark fusion processes are also studied and some periodicity was found in the behavior of the graviton mass spectrum. Production cross sections multiplied by branching fractions were calculated for the massive graviton, G, within Randall-Sundrum scenario and the most probable processes of graviton decay at 13 TeV, 14 TeV, and 100 TeV were counted

Decay width modeling of Higgs boson within THDM model

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.Comment: 10 pages, 1 figur