Hamburg 2016 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 68: Suche nach Supersymmetrie III (Hadronische, Tau, Photon Endzustände)

T 68.5: Vortrag

Mittwoch, 2. März 2016, 17:45–18:00, VMP5 HS B2

Performance of Different Searches for Supersymmetry with Tau Leptons at the ATLAS Experiment — Philip Bechtle, Klaus Desch, •Philipp König, Oliver Ricken, Steffen Schaepe, and Martin Schultens — University of Bonn

The Standard Model (SM) of particle physics is a successful approach to explain the building blocks of matter and the universe but still incomplete. Run-II of the Large Hadron Collider (LHC) is a bargain to discover physics beyond the SM. Supersymmetry (SUSY) is one of the most promising models of physics beyond the SM amongst many others.

The search for tau leptons in the final state is very interesting, since their heavy mass makes their SUSY partners preferred particles in the decay chain. In addition, only a few SM processes can produce multiple tau leptons and large missing transverse energy in the final state. While in Run-I the search for SUSY was mainly focussed on mechanisms for soft supersymmetry breaking such as GMSB, the search in Run-II is aiming for Simplified Model Spectra (SMS).

In this talk the motivation and performance of different analyses with two or more tau leptons in the final state with the ATLAS detector will be presented. Aspects like acceptance and efficiency, particularly for the SMS, will be addressed. The presented analyses will be compared and strengths of each analysis will be stressed as well as any differences. The parametrization of the SMS will be tested for the dependence of the efficiency on intrinsic mass relations, to suggest possible extensions of the SMS.