Towards Measuring the Stop Mixing Angle at the LHC

Abstract

We address the question of how to determine the stop mixing angle and its CP-violating phase at the LHC. As an observable we discuss ratios of branching ratios for different decay modes of the light stop ~t_1 to charginos and neutralinos. These observables can have a very strong dependence on the parameters of the stop sector. We discuss in detail the origin of these effects. Using various combinations of the ratios of branching ratios we argue that, depending on the scenario, the observable may be promising in exposing the light stop mass, the mixing angle and the CP phase. This will, however, require a good knowledge of the supersymmetric spectrum, which is likely to be achievable only in combination with results from a linear collider.

30 pages, 11 figures, version to appear in EPJC

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Cited by in corpus (14)

• Vacuum Stability and the MSSM Higgs Mass
• Probing natural SUSY from stop pair production at the LHC
• How to Improve Top Tagging
• Boosted Semileptonic Tops in Stop Decays
• Top Polarization and Stop Mixing from Boosted Jet Substructure
• Benchmarking an Even Better HEPTopTagger
• Prospects for natural SUSY
• Refining light stop exclusion limits with $W^{+}{W}^{-}$ cross sections
• Naughty or Nice? The Role of the `N' in the Natural NMSSM for the LHC
• Measurement of CP asymmetries in neutralino production at the ILC
• Testing the CP-violating MSSM in stau decays at the LHC and ILC
• CP-violation in SUSY cascades at the LHC
• Momentum reconstruction at the LHC for probing CP-violation in the stop sector
• Theoretical concepts and measurement prospects for BSM trilinear couplings: a case study for scalar top quarks