Sneutrino cold dark matter, a new analysis: relic abundance and detection rates

Abstract

We perform a new and updated analysis of sneutrinos as dark matter candidates, in different classes of supersymmetric models. We extend previous analyses by studying sneutrino phenomenology for full variations of the supersymmetric parameters which define the various models. We first revisit the standard Minimal Supersymmetric Standard Model, concluding that sneutrinos are marginally compatible with existing experimental bounds, including direct detection, provided they compose a subdominant component of dark matter. We then study supersymmetric models with the inclusion of right-handed fields and lepton-number violating terms. Simple versions of the leptonnumber-violating models do not lead to phenomenology different from the standard case when the neutrino mass bounds are properly included. On the contrary, models with right-handed fields are perfectly viable: they predict sneutrinos which are compatible with the current direct detection sensitivities, both as subdominant and dominant dark matter components. We also study the indirect detection signals for such successful models: predictions for antiproton, antideuteron and gamma-ray fluxes are provided and compared with existing and future experimental sensitivities. The neutrino flux from the center of the Earth is also analyzed.

Higgs boson mass and complex sneutrino dark matter in the supersymmetric inverse seesaw models

“…However, the heaviness of the soft spectrum, owing to a relatively heavy Higgs boson and null sparticle searches, along with the stringent bounds from direct detection experiments such as XENON100 [18], 4 now threaten the viable neutralino DM. Another neutral LSP candidate, the lightest sneutrino, has been investigated by many authors in many contexts [14][15][16][17][27][28][29], and now may show some advantages.…”

“…trino [28,[30][31][32][33][34]. In this case, the DM-nucleon scattering mediated by Z−boson becomes inelastic and may be kinematically forbidden.…”

Discriminating dark matter candidates using direct detection

“…Right-handed sneutrinos as a CDM candidate have also been revived lately [25,26]. Predictions for signals in direct [19,27,28,29,30,31], indirect [32,33,34,35,36,37,38,39,40,41,42,43,44] or collider experiments have been made within each of these models [45,46,7,47,48,49,50,51,52,53,54,55,56,57]. Furthermore in specific case studies, in particular within supersymmetric models, the prospects of determining the properties of the new particles and from there infer a "collider" prediction for the relic density or for the detection rates were analyzed [58,59,46,60].…”

Dark Matter Annual Modulation Results by DAMA/LIBRA

“…: SUSY particles (as neutralino [21] or sneutrino in various scenarios [22]), inelastic Dark Matter in various scenarios [23,24], electron interacting dark matter (including WIMP scenarios) [10], a heavy neutrino of the 4-th family, sterile neutrino [11], Kaluza-Klein particles, self-interacting dark matter, axion-like (light pseudoscalar and scalar candidate) [6], mirror dark matter in various scenarios [25], Resonant Dark Matter [26], DM from exotic 4th generation quarks [27], Elementary Black holes, Planckian objects, Daemons, Composite DM [28], Light scalar WIMP through Higgs portal [29], Complex Scalar Dark Matter [30], specific two Higgs doublet models, exothermic DM [31], Secluded WIMPs [32], Asymmetric DM [33], Isospin-Violating Dark Matter [34], Singlet DM [35], Specific GU [36], SuperWIMPs [37], WIMPzilla [38], etc. [39].…”