We compute the complete next-to-leading order SUSY-QCD corrections for the associated production of a charged Higgs boson with a top quark via bottom-gluon fusion. We investigate the applicability of the bottom parton description in detail. The higher order corrections can be split into real and virtual corrections for a general two Higgs doublet model and into additional massive supersymmetric...

We demonstrate that decay angle correlations in ττ and tt decay modes could allow a determination of whether or not a neutral Higgs boson is a CP eigenstate. Sensitivity of the correlations is illustrated in the case of the ee → ZH and μμ → H production processes for a two-doublet Higgs model with CPviolating neutral sector. A very useful technique for minimizing ‘depolarizationfactor’ suppress...

We study Higgs boson decays in the minimal supersymmetric standard model where the tree–level CP invariance of the Higgs potential is explicitly broken by loop effects of soft CP–violating Yukawa interactions related to scalar quarks of the third generation. The scalar–pseudoscalar mixing among two neutral CP–even Higgs bosons and one CP–odd Higgs boson due to explicit CP violation modifies the...

Large higher-order corrections enter the Higgs boson sector of the MSSM via Higgs-boson self-energies. Their effects have to be taken into account for the correct treatment of loopcorrected Higgs-boson mass eigenstates as external (on-shell) or internal particles in Feynman diagrams. We review how the loop corrections, including momentum dependence and imaginary contributions, are correctly tak...

It has been more than twenty years since the basic idea of the standard model(SM) of elementary particle theory was proposed. This theory is based on two fundamental principles, i.e. the gauge principle and the Higgs mechanism. From recent experiments it is now clear that strong and electroweak interactions are described by an SU(3)×SU(2)×U(1) gauge theory. On the other hand, little is known ab...

We have used detailed Monte Carlo simulations to study search strategies for Higgs bosom at high energy e+ecolliders. We extend an earlier study of the minimal single-Higgs-doublet model at a center-of-mass energy of 1 TeV to examine the effects of b-quark tagging and jet counting. It is found that these techniques can increase the signal-to-noise ratio substantially in the mass range around th...

Constraints on the lifetime and width of the Higgs boson are obtained from H → ZZ → 4l events using data recorded by the CMS experiment during the LHC run 1 with an integrated luminosity of 5.1 and 19.7 fb −1 at a center-of-mass energy of 7 and 8 TeV, respectively. The measurement of the Higgs boson lifetime is derived from its flight distance in the CMS detector with an upper bound of τ H < 1....

Charged Higgs boson production in association with a top quark could be the first indication of the existence of Higgs particles. The Tevatron Run-II started data-taking in April 2001 at √ s = 1960 GeV and could probe the existence of a charged Higgs boson beyond the current mass limit. We study the pp̄ → tbH± production process with Monte Carlo simulations in HERWIG and PYTHIA, comparing expect...

In order to identify the Higgs sector realized in nature, the predictions for Higgs boson masses, production cross sections and decay widths have to be compared with experimental results. We give a brief overview about computer codes for the evaluation of the properties of charged Higgs bosons, mostly focusing on the case of the Minimal Supersymmetric Standard Model (MSSM). We briefly review th...

The electroweak corrections to the partial widths of the H → χ̃+i χ̃0j (i = 1, j = 1, 2) decays including one-loop diagrams of the third generation quarks and squarks, are investigated within the Supersymmetric Standard Model. The relative corrections can reach the values about 10%, therefore they should be taken into account for the precise experimental measurement at future colliders. PACS: 14....