https://doi.org/10.1140/epjc/s10052-012-2169-9
Regular Article - Theoretical Physics
Light neutralino dark matter in the pMSSM
Implications of LEP, LHC and dark matter searches on SUSY particle spectra
1
Centre de Recherche Astrophysique de Lyon, Observatoire de Lyon, 69561, Saint-Genis Laval Cedex, France
2
CNRS, UMR 5574, Ecole Normale Supérieure de Lyon, Lyon, France
3
Université de Lyon France, Université Lyon 1, 69622, Villeurbanne Cedex, France
4
CERN, 1211, Geneva 23, Switzerland
5
Santa Cruz Institute of Particle Physics, University of California, Santa Cruz, CA, 95064, USA
6
Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
7
Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, BP 10448, 63000, Clermont-Ferrand, France
* e-mail: alexandre.arbey@ens-lyon.fr
Received:
22
May
2012
Revised:
7
September
2012
Published online:
5
October
2012
Three dark matter direct detection experiments have reported possible signals which can be interpreted as due to the interaction of light WIMPs with large scattering cross section. In this paper we investigate the viability of SUSY scenarios with light neutralino using high statistics scans in the pMSSM. We identify several scenarios which give rise to very light neutralinos with large direct detection scattering cross sections. We apply constraints from dark matter relic density, direct detection, indirect detection, as well as flavour physics, electroweak precision tests, LEP and Tevatron limits, LHC limits on SUSY, Higgs and monojet searches. In particular we require the Higgs boson mass to be in the range 122.5<M h <127.5 GeV. We study how the combination of these constraints largely reduces the number of viable scenarios. MSSM solutions with a light neutralino and an almost degenerate lightest scalar bottom quark emerge as the scenario in agreement with all these constraints. We study their characteristics in relation to the LHC missing E T searches.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2012
