Same-Sign Charginos and Majorana Neutralinos at the LHC

Abstract

We demonstrate the possibility of studying weakly interacting new particles in weak boson fusion, using the example of supersymmetric same-sign charginos. This signal could establish the existence of Majorana neutralinos and give access to their electroweak couplings. It can be observed over (supersymmetric) QCD backgrounds provided the charginos are light and not too close to the squark mass. We finally show how same-sign fermion production can be distinguished from same-sign scalars or vectors arising in other models of new physics.

14 pages, 2 tables, 7 embedded figs., to appear in PRD; typos corrected, references added and updated

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• Stable Massive Particles at Colliders
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• Next-to-leading order QCD corrections to W+Z and W-Z production via vector-boson fusion
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Cited by in corpus (6)

• Measuring the Higgs Sector
• Testing the Majorana Nature of Gluinos and Neutralinos
• Stop on Top
• Leptogenic Supersymmetry
• Tau-Sneutrino NLSP and Multilepton Signatures at the LHC
• Probing dark matter and CMSSM with same-sign dilepton searches at the LHC