Detecting underabundant neutralinos

Abstract

The electroweak sector may play a crucial role in discovering supersymmetry. We systematically investigate the patterns of the MSSM-like electroweakinos, when the neutralino relic abundance Ω χ h 2 ≤ 0.12, that is, also admitting for multi-component Dark Matter, in a broad range of the parameter space. We find that for a very large range of parameters the Direct Detection experiments are/will be sensitive to underabundant neutralinos, in spite of the strong rescaling of the flux factor. The second general conclusion is that the bound Ω χ h 2 ≤ 0.12 together with the LUX (XENON1T) limits for the neutralino spin independent scattering cross sections constrain the electroweakino spectrum so that the mass differences between the NLSP and the LSP are smaller than 40 (10) GeV, respectively, with important implications for the collider searches. The future Direct Detection experiments and the high luminosity LHC run will probe almost the entire range of the LSP and NLSP mass spectrum that is consistent with the bound Ω χ h 2 ≤ 0.12.

Multicomponent Dark Matter from gauge symmetry

“…This is in contrast to more conventional models where the two DM components have different origins such as the mixed axion-neutralino DM scenario [30,31]. Consequently, the contributions of the components to the total DM density are controlled by a set of the UV parameters.…”

Blind spots for neutralino dark matter in the NMSSM

“…Many useful formulae that follow from this matrix can be found in the appendix of ref. [28] with obvious substitutions of the MSSM parameters into the NMSSM ones sitting in the corresponding entries of the 3 × 3 sub-matrix.…”

“…Some possible ways to constrain blind spots may be to use the direct and indirect detection experiments sensitive to the SD cross-sections or dedicated collider searches which in the context of MSSM turn out to be complementary to direct dark matter searches, see e.g. [28,43,44] for some recent work on this topic. Some studies of the LHC sensitivity to Higgsino-singlino sector has already been done [45] but more effort in this direction is welcome.…”

Very Degenerate Higgsino Dark Matter

“…As null results at Large Hadron Collider (LHC) experiments push supersymmetry (SUSY) to TeV scale, such Higgsino as the lightest supersymmetric particle (LSP) has recently become an important target for future collider [2][3][4][5][6][7] and DM search experiments [5][6][7][8][9][10][11]. A priori, the Higgsino mass µ and gaugino masses M 1 , M 2 for the Bino and Wino are not related; thus, the pure Higgsino scenario with much heavier gauginos is possible and natural by considering two distinct Peccei-Quinn and R symmetric limits.…”