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T: Fachverband Teilchenphysik

T 36: Search for Supersymmetry II

T 36.7: Vortrag

Dienstag, 16. März 2021, 17:30–17:45, Tk

Reinterpreting a search for electroweakinos in the phenomenological MSSM with the ATLAS detector. — •Eric Schanet and Jeanette Lorenz — Ludwig-Maximilians-Universität München

Supersymmetry is a popular extension of the Standard Model of Particle Physics (SM), providing a solution to several open questions of the SM. At the LHC, searches for supersymmetry (SUSY) are traditionally interpreted in simplified models containing a very limited number of free parameters. Although very useful for covering a wide range of phenomena, this methods fails to capture more complex effects resulting from a larger set of parameters and the influence of different production and decay processes. Thus, it is of high interest to interpret SUSY searches in more complete and realistic supersymmetric models.

In this talk efforts to reinterpret a search for electroweakinos in the phenomenological MSSM (pMSSM)—a 19-dimensional supersymmetric model space—are presented. In order to cope with the high dimensionality of the pMSSM, a method for computationally efficient but still reliable analysis approximations is introduced, and illustrated on exemplary SUSY searches. Relying on full likelihoods of the respective searches, these approximations are not only crucial for reinterpretations in high-dimensional model spaces, but also serve as useful tools for theorists wishing to incorporate results from ATLAS SUSY searches in their work. Finally, results from a preliminary scan in the pMSSM are presented and discussed.