Lower limit on the neutralino mass in the general MSSM

2003/10/02 by G. Belanger, G Belanger, F. Boudjema +7 · 3 citations
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Context (archaeology) #Gaugino #Minimal Supersymmetric Standard Model #Neutralino #Neutrino Physics Research #Particle physics theoretical and experimental studies #Pseudoscalar #Superpartner #Supersymmetry #Tevatron #hep-ph

paper · pdf · doi:10.1088/1126-6708/2004/03/012

published as JHEP 0403:012,2004 · 37 pages, LateX, 16 figures, paper with higher resolution figures available at http://wwwlapp.in2p3.fr/~boudjema/papers/bound-lsp/bound-lsp.html

arxiv created 2003/10/02 · openalex publication_date 2004/03/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We discuss constraints on SUSY models with non-unified gaugino masses and R_P conservation. We derive a lower bound on the neutralino mass combining the direct limits from LEP, the indirect limits from gmuon, bsgamma, Bsmumu and the relic density constraint from WMAP. The lightest neutralino (mneutralino=6GeV) is found in models with a light pseudoscalar with MA<200GeV and a large value for tanβ. Models with heavy pseudoscalars lead to mneutralino>18(29)GeV for tanβ=50(10). We show that even a very conservative bound from the muon anomalous magnetic moment can increase the lower bound on the neutralino mass in models with mu<0 and/or large values of tanβ. We then examine the potential of the Tevatron and the direct detection experiments to probe the SUSY models with the lightest neutralinos allowed in the context of light pseudoscalars with high tanβ. We also examine the potential of an e+e- collider of 500GeV to produce SUSY particles in all models with neutralinos lighter than the W. In contrast to the mSUGRA models, observation of at least one sparticle is not always guaranteed.

Citations

• Towards a theory of soft terms for the supersymmetric standard model
• Constraining anomaly mediated supersymmetry breaking framework via ongoing muong−2experiment at Brookhaven
• Detection of Bs→μ+μ− at the tevatron Run II and constraints on the SUSY parameter space
• Neutralino properties in the light of a further indication of an annual modulation effect in WIMP direct search
• Search for ‘invisible’ Higgs signals at LHC via associated production with gauge bosons
• Constraints on supersymmetric models from the muon anomalous magnetic moment
• Neutralino-nucleon cross section and charge and colour breaking constraints
• Sparticle spectrum and constraints in anomaly mediated supersymmetry breaking models
• Pion Pole Contribution to Hadronic Light-By-Light Scattering and Muon Anomalous Magnetic Moment
• Radiative corrections to theZbb¯vertex and constraints on extended Higgs sectors
• The MSSM invisible Higgs in the light of dark matter and g−2
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological Parameters
• Final results from DELPHI on the searches for SM and MSSM neutral Higgs bosons
• Weak radiative B-meson decay beyond leading logarithms

Cited by

• Positrons from dark matter annihilation in the galactic halo: Theoretical uncertainties
• Higgs decays in supersymmetric models with light neutralinos
• Indirect signals from light neutralinos in supersymmetric models without gaugino mass unification