2005/07/31 by Kingman Cheung, Jeonghyeon Song
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.72.055019
published as Phys.Rev. D72 (2005) 055019 · minor revisions and references added
arxiv created 2005/09/01 · openalex publication_date 2005/09/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the scenario recently proposed by Arkani-Hamed and Dimopoulos, the supersymmetric scalar particles are all very heavy, at least of the order of 109 GeV but the gauginos, Higgsino, and one of the CP-even neutral Higgs bosons remain light under a TeV. In addition to gluino production, the first SUSY signature would be pair production of neutralinos and/or charginos. Here we study, with explicit CP violation, the production of neutralinos and charginos at hadronic colliders as well as the possible decay modes. We notice that the branching ratio of the neutralino radiative decay can be sizable unlike the case with light sfermions. In particular, the decay of \stackrel\texttildelow\ensuremathχ30\ensuremath→\stackrel\texttildelow\ensuremathχ10\ensuremathγ has a branching ratio of the order O(1) percent. In colliders, it would give rise to signatures of an isolated single photon plus missing energy.