We study the effects of the complete supersymmetric QCD and electroweak one-loop corrections to the tt̄ forward-backward asymmetry at the Fermilab Tevatron pp̄ collider. We work in the complex Minimal Supersymmetric Standard Model (MSSM), only restricted by the condition of minimal flavor violation (MFV). We perform a comprehensive scan over the relevant parameter space of the complex MFV-MSSM an...

We perform a systematic study of sneutrino (ν̃) production and decays in the Minimal Supersymmetric Standard Model (MSSM) with lepton flavour violation (LFV). We study bosonic decays of ν̃ as well as fermionic ones. We show that the effect of slepton generation mixing on the ν̃ production and decays can be quite large in a significant part of the MSSM parameter space despite the very strong experi...

We discuss the radiative corrections to charged and neutral current deep-inelastic neutrino–nucleon scattering in the minimal supersymmetric standard model (MSSM). In particular, we study deviations, δRν(ν̄), from the Standard Model prediction for the ratios of neutralto charged-current cross sections, taking into account all sources for deviations in the MSSM, i.e. different contributions from ...

SOFTSUSY is a program which accurately calculates the spectrum of super-particles in the Minimal Supersymmetric Standard Model (MSSM). The program solves the renormalisation group equations with theoretical constraints on soft supersymmetry breaking terms provided by the user. Weak-scale gauge coupling and fermion mass data (including one-loop finite MSSM corrections) are used as a boundary con...

In the minimal supersymmetric standard model (MSSM) we calculate the oneloop finite-temperature corrections from the squarks-Higgs bosons sector, reconstruct the effective two-Higgs-doublet potential and study possibilities of the electroweak phase transition in the full MSSM (mH± , tgβ, At,b, μ, mQ, mU , mD) parameter space. At large values of At,b and μ of around 1 TeV, favored indirectly by ...

We discuss whether the (MSSM) unification of gauge couplings can be accommodated in string theories with a low (TeV) string scale. This requires either power law running of the couplings or logarithmic running extremely far above the string scale. In both cases it is difficult to arrange for the multiplet structure to give the MSSM result. For the case of power law running there is also enhance...

We present a calculation of the cross section for the process e+e− → W±H∓ in the minimal supersymmetric standard model (MSSM) and the Two Higgs Doublet Model (THDM). We study the basic features of the MSSM prediction for some distinctive parameter scenarios. We find large effects from virtual squarks for scenarios with large mixing in the stop-sector which can lead to a cross section vastly dif...

Supersymmetric extensions of the standard model generically contain additional sources of CP violation. We discuss how at one loop a potentially large CP violating coupling of the lightest Higgs, h0, to leptons is induced in the minimal supersymmetric standard model (MSSM). The CP violating couplings of h0 in extensions of the MSSM, such as the next-to-minimal supersymmetric standard model (NMS...

The theoretical structure of the Higgs sector of the Minimal Supersymmetric Standard Model (MSSM) is briefly described. An outline of Higgs phenomenology at future lepton colliders is presented, and some opportunities for probing the physics of the MSSM Higgs sector at an e−e− collider are considered. To appear in e−e− 97: Proceedings of Electron–Electron Linear Collider Workshop Santa Cruz, CA...

The LEP-II bound on the light Higgs mass rules out the vast majority of parameter space left to the Minimal Supersymmetric Standard Model (MSSM) with weakscale soft-masses. This suggests the importance of exploring extensions of the MSSM with non-minimal Higgs physics. In this article, we explore a theory with an additional singlet superfield and an extended gauge sector. The theory has a numbe...