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T: Fachverband Teilchenphysik

T 46: Supersymmetrie 2

T 46.2: Talk

Tuesday, March 10, 2009, 17:00–17:15, Audimax

ATLAS discovery potential of Supersymmetry with b-jet final states — •Mirjam Fehling and Xavier Portell — Albert-Ludwig-Universitaet, Freiburg, Germany

Supersymmetry is a theory beyond the Standard Model that addresses some of the problems in our current understanding of particles and their interactions. In this theory, every Standard Model particle has a superpartner which differs by half a unit of spin and that should have a mass not far from the TeV scale. If these new particles appear when the Large Hadron Collider starts taking data, an excess with respect to the Standard Model predictions could be observed in some characteristic distributions. One of the preferred final state topologies consists of large missing transverse energy and multiple jets of different flavours. In this talk, the ATLAS discovery potential of supersymmetry with b-jets in the final state will be presented. Heavy flavoured jets are challenging objects to be identified but they provide valuable information to characterise the new processes which may appear. The b-jet channel has been found to be competitive with the other channels explored in ATLAS and it also improves the reach in some particular regions of the mSUGRA parameter space.