We present the currently most accurate evaluation of the W boson mass, MW , in the Minimal Supersymmetric Standard Model (MSSM). The full complex phase dependence at the one-loop level, all available MSSM two-loop corrections as well as the full Standard Model result have been included. We analyse the impact of the different sectors of the MSSM at the one-loop level with a particular emphasis o...

In the Minimal Supersymmetric Standard Model (MSSM) we calculate the corrections to neutral CP-even Higgs-boson production in the WW -fusion and Higgsstrahlung channel, e+e− → ν̄ν {h,H}, at a future Linear Collider, taking into account all O(α) corrections arising from loops of fermions and sfermions. For the production of the lightest MSSM Higgs boson, h, we find genuine loop corrections (beyon...

We study the quark flavor violating Higgs boson decay h → b̄sþ bs̄ in the minimal supersymmetric standard model (MSSM). The decay is analyzed first in a model-independent approach and second in the minimal flavor violating (MFV) constrained MSSM. The experimental constraints from B-physics observables (BPO) and electroweak precision observables (EWPO) are also calculated and imposed on the parame...

This study provides a brief overview of low energy supersymmetry (SUSY) in light current experimental constraints, such as collider searches, dark matter and muon g?2 measurements. In addition, we survey variety supersymmetric models: the phenomenological minimal model (MSSM); models with cut-off-scale boundary conditions, i.e., supergravity (mSUGRA) or constrained MSSM (CMSSM), gauge mediation...

Extensions of the minimal supersymmetric standard model (MSSM) with additional singlet scalar fields solve the important μ-parameter fine-tuning problem of the MSSM.We compute and compare the neutral Higgs boson mass spectra, including one-loop corrections, of the following MSSM extensions: next-tominimal supersymmetric standard model (NMSSM), the nearly-minimal supersymmetric standard model (n...

In the minimal supersymmetric standard model (MSSM) with complex parameters, supersymmetric loop effects can lead to CP violation. We calculate the rate asymmetries of decays of charginos into the lightest neutralino and a W boson on the basis of the most important loop contributions in the third generation squark sectors. It turns out that the CP violating asymmetries can be a few per cent in ...

We discuss the prospects–within several models–for the observation of CP-violation (CP) in top decays and production. The outlook looks best for t → bW at the LHC (MSSM CP), t → bτ ντ at TeV3, LHC and NLC (H + CP), p¯ p → t ¯ b + X at TeV3 (MSSM CP), pp → t ¯ t + X at the LHC (MSSM CP & neutral Higgs CP) and for e + e − → t ¯ th, t ¯ tZ, where h is the lowest mass neutral Higgs boson, at an NLC...

We discuss a heterotic–string solution in which the observable sector effective field theory just below the string scale reduces to that of the MSSM, with the standard observable gauge group being just SU(3)C × SU(2)L × U(1)Y and the SU(3)C × SU(2)L × U(1)Y –charged spectrum of the observable sector consisting solely of the MSSM spectrum. Associated with this model is a set of distinct flat dir...

The various search modes for the Higgs bosons of the Standard Model (SM) and its Minimal Supersymmetric Extension (MSSM) at the International Linear Collider (ILC) will be summarized briefly. In particular, as a unique discovery mode the production of heavy neutral MSSM Higgs bosons for medium values of tan β in photon collisions will be presented. Furthermore, τ + τ − fusion into MSSM Higgs bo...

We study the fine-tuning problem on the initial condition of inflation in the minimal supersymmetric standard model (MSSM), associated with the narrowness of the slow-roll region. We consider two cases before the onset of the MSSM inflation, namely, the radiation dominated era and preceding inflationary era. We find thermal dissipation does not induce additional friction to the inflaton, so tha...