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Mass Bounds on a Very Light Neutralino

Year: 2009
Type: preprint
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.
Authors: Herbi K. Dreiner, Sven Heinemeyer, Olaf Kittel, Ulrich Langenfeld, Arne M. Weber, Georg Weiglein
Institutions: University of Bonn, Consejo Superior de Investigaciones Científicas, Instituto de Física de Cantabria, Universidad de Granada, Deutsches Elektronen-Synchrotron DESY, Max Planck Institute for Physics, Durham University
Language: English
Open Access status: green
OpenAlex ID: W3102862371
Cites: 261
Cited by: 80
Related to: 10