The European Physical Journal C

, Volume 62, Issue 3, pp 547–572

Mass bounds on a very light neutralino

  • Herbi K. Dreiner
  • Sven Heinemeyer
  • Olaf Kittel
  • Ulrich Langenfeld
  • Arne M. Weber
  • Georg Weiglein
Open Access
Regular Article - Theoretical Physics

DOI: 10.1140/epjc/s10052-009-1042-y

Cite this article as:
Dreiner, H.K., Heinemeyer, S., Kittel, O. et al. Eur. Phys. J. C (2009) 62: 547. doi:10.1140/epjc/s10052-009-1042-y

Abstract

Within the Minimal Supersymmetric Standard Model (MSSM) we systematically investigate the bounds on the mass of the lightest neutralino. We allow for non-universal gaugino masses and thus even consider massless neutralinos, while assuming in general that R-parity is conserved. Our main focus is on laboratory constraints. We consider collider data, precision observables, and also rare meson decays to very light neutralinos. We then discuss the astrophysical and cosmological implications. We find that a massless neutralino is allowed by all existing experimental data and astrophysical and cosmological observations.

Copyright information

© Springer-Verlag / Società Italiana di Fisica 2009

Authors and Affiliations

  • Herbi K. Dreiner
    • 1
  • Sven Heinemeyer
    • 2
  • Olaf Kittel
    • 3
  • Ulrich Langenfeld
    • 4
  • Arne M. Weber
    • 5
  • Georg Weiglein
    • 6
  1. 1.Bethe Center for Theoretical Physics & Physikalisches Institut der Universität BonnBonnGermany
  2. 2.Instituto de Física de Cantabria (CSIC-UC)SantanderSpain
  3. 3.Departamento de Física Teórica y del Cosmos and CAFPEUniversidad de GranadaGranadaSpain
  4. 4.DESY ZeuthenZeuthenGermany
  5. 5.Max-Planck-Institut für Physik (Werner-Heisenberg-Institut)MunichGermany
  6. 6.IPPPUniversity of DurhamDurhamUK

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