Speaker
Description
Naturalness suggests that the masses of the lightest electroweak gauginos (electroweakinos) are near the electroweak scale and, as a result, are within the scope of current LHC searches. However, LHC searches have not yet provided evidence of any supersymmetric (SUSY) particles. While exclusion limits for SUSY particles have been commonly reported assuming a simplified model where the branching ratio of targeted decays is 100%, this is not realistic in the minimal supersymmetric standard model (MSSM) and does not represent the effect of a large number of competing production and decay processes. If the decay branching ratios of these particles are lower, however, the reported mass limits are likely to be optimistic.
Focusing on chargino-neutralino production in a conventionally considered scenario where the LSP is bino-like and the next lightest SUSY particle is wino-like, electroweakino decay branching ratio into on-shell SM bosons can be established in terms of electroweak phenomenological MSSM (pMSSM) parameters. This talk will present the dependence of the branching ratios on the electroweak MSSM parameters, restate mass limits from simplified ATLAS searches in terms of the pMSSM, and ultimately, present the implications of a pMSSM based approach to SUSY searches.
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