aula Majorana - Edificio G. Marconi (Dip. di Fisica - Edificio G. Marconi)
aula Majorana - Edificio G. Marconi
Dip. di Fisica - Edificio G. Marconi
Description
Present searches for supersymmetric quark and gluon partners in the jets + missing energy channel at the Tevatron have been done within the MSUGRA framework, which strongly restricts the relative masses of particle species. In particular, the masses for the gluino and the bino are restricted to have the ratio 7:1, giving large missing transverse momenta and hard jets in the decay of gluinos to binos. Other supersymmetry breaking mediation scenarios have been shown to allow for different mass ratios, in particular it is possible to have semi-degenerate masses of gluinos and binos. In such a scenario, even quite light gluinos may have been missed in Tevatron searches due to the absence of hard jets. We have done a new study of gluino production using realistic backgrounds to investigate the discovery reach of the Tevatron in this more general situation. For this study, a proper description of extra jet production is vital for the signal simulation, which has therefore been done using the jet matching techniques recently implemented in MadGraph/MadEvent.