Mixed sneutrino dark matter in light of the 2011 XENON and LHC results

• Published in: Journal of cosmology and astroparticle physics Vol. 2012; no. 9; p. 13
• Main Authors: Dumont, Béranger, Bélanger, Geneviève, Fichet, Sylvain, Kraml, Sabine, Schwetz, Thomas
• Format: Journal Article
• Language: English
• Published: United States Institute of Physics (IOP) 01.09.2012
• Subjects: ASTROPHYSICS; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CERN LHC; Cold dark matter; Computer simulation; COSMOLOGY; Dark matter; GEV RANGE; HIGGS BOSONS; HIGGS MODEL; High Energy Physics - Phenomenology; MARKOV PROCESS; MONTE CARLO METHOD; Monte Carlo methods; NEUTRINOS; NONLUMINOUS MATTER; PARTICLE IDENTIFICATION; Physics; REST MASS; Sampling; Searching; SPACE; SPARTICLES; STANDARD MODEL; SUPERSYMMETRY; SYMMETRY BREAKING; Xenon
• ISSN: 1475-7516; 1475-7508; 1475-7516
• DOI: 10.1088/1475-7516/2012/09/013

In the context of supersymmetric models in which small Dirac neutrino masses are generated by supersymmetry breaking, a mainly right-handed (RH) mixed sneutrino can be an excellent cold dark matter (DM) candidate. We perform a global analysis of the Minimal Supersymmetric Standard Model (MSSM)+RH neutrino parameter space by means of Markov Chain Monte Carlo sampling. We include all relevant constraints from collider and dark matter searches, paying particular attention to nuclear and astrophysical uncertainties. Two distinct cases can satisfy all constraints: heavy sneutrino DM with mass of order 100 GeV, as well as light sneutrino DM with mass of about 3-6 GeV. We discuss the implications for direct and indirect dark matter searches, as well as for SUSY and Higgs searches at the LHC for both, the light and the heavy sneutrino dark matter case. The light sneutrino case is excluded by the 125-126 GeV Higgs signal.