arXiv subjects

Bjarte Kileng

Publications and source records attributed to Bjarte Kileng.

3 recordsLinked to original sources

arXiv1994

Light-Gluino Production at LEP

If gluinos are light, they will be produced in electron-positron annihilation at LEP, not only by radiation in pairs off quarks and antiquarks, but also without accompanying quark and antiquark jets. We here discuss the latter process, pair production of gluinos, in a model with soft supersymmetry breaking, allowing for mixing between the squarks. In much of the parameter space of the Minimal Supersymmetric Model (MSSM) the cross section corresponds to a $Z$ branching ratio above $10^{-5}$, even up to $10^{-4}$. A non-observation of gluinos at this level restricts the allowed MSSM parameter space.

hep-ph↗

arXiv1994

Gluino Production in Electron-Positron Annihilation

We discuss the pair production of gluinos in electron-positron annihilation at LEP, in a model with soft supersymmetry breaking, allowing for mixing between the squarks. In much of the parameter space of the Minimal Supersymmetric Model (MSSM) the cross section corresponds to a $Z$ branching ratio above $10^{-5}$, even up to $10^{-4}$. A non-observation of gluinos at this level restricts the allowed MSSM parameter space. In particular, it leads to lower bounds on the soft mass parameters in the squark sector.

hep-ph↗

arXiv1993

Effects of scalar mixing in ${g}{g} \rightarrow \mbox{Higgs} \rightarrow \ga\ga$

We discuss the effects of mixing of scalars belonging to left-- and right--chiral MSSM super--multiplets on the process ${g}{g}\rightarrow \hnl \rightarrow \ga\ga$, which is a promising channel for the discovery of the lightest CP--even MSSM Higgs boson at the LHC and the SSC. The effects of the left--right scalar mixing are small in most of parameter space. However, there exist regions where the mixing is important. Due to mixing, there can be large enhancements of the cross section in a region of parameter space where the no--mixing approximation yields a value that is too low for experimental discovery of the $\hnl$ at the LHC and the SSC.

hep-ph↗