Connecting the direct detection of dark matter with observation of sparticles at the LHC

Abstract

An analysis is given connecting event rates for the direct detection of neutralino dark matter with the possible signatures of supersymmetry at the LHC. It is shown that if an effect is seen in the direct detection experiments at a level of O(10 −44 ) cm 2 for the neutralino-proton cross section, then within the mSUGRA model the next heavier particle above the neutralino is either a stau, a chargino, or a CP odd/CP even (A/H) Higgs boson. Further, the collider analysis shows that models with a neutralino-proton cross section at the level of (1 − 5) × 10 −44 cm 2 could be probed with as little as 1 fb −1 of integrated luminosity at the LHC at √ s = 7, 10 TeV. The most recent limit from the five tower CDMS II result on WIMP-nucleon cross section is discussed in this context. It is argued that the conclusions of the analysis given here are more broadly applicable with inclusion of non-universalities in the SUGRA models.

Predictive signatures of supersymmetry: Measuring the dark matter mass and gluino mass with early LHC data

“…(11) via stau-co-annihilation, which have a heavier neutralino mass than the models studied here (owing to mass limits on the stau) and we find that the present XENON data imposes only a slightly weaker lower bound of m A > ∼ 250 GeV. Constraints of this type have been studied in SUGRA models [56] and in generic weak scale MSSM models in references [57,58] and more recently in the context of low mass dark matter in references [59][60][61]. The results presented here show that for dark matter in the 50 GeV region, the constraints on the CP-odd Higgs sector in models of radiative breaking are also quite strong.…”

“…Thus, some aspects of the minimal supergravity models where the relics annihilate near the light CP-even Higgs pole have been discussed in Ref. [14][15][16][17][18][19], which fall under the mass hierarchy denoted by mSP4 (supergravity mass pattern 4) [14,15], where, in particular, a clean edge in the dilepton invariant mass in this model class was noted in Ref. [15].…”

“…The mass splitting between the gluino and the lighter gauginos is appreciable. Thus should this model class be realized in nature, the production of jets from the gluino should be seen at the LHC at √ s = 7 TeV with about a few inverse femtobarns of data [16], [22], [23], [24,25], [19].…”

Cornering light neutralino dark matter at the LHC

“…[20,21,22,19,23,36,52]), aiming at a possible explanation of the annual modulation signal at DAMA/LIBRA [12,13] and also reported by CoGeNT [14] and the excess of nuclear recoil events observed by CoGeNT itself and CRESST [15]. Recently, three signal events have been also reported by CDMS [16].…”

“…However, recent LHC results exclude light DM in this parameter region of the MSSM. The reason is the following: m χ 0 1 ≈ 10 ÷ 20 GeV requires a light CP-odd Higgs boson A (with m A 100 GeV) and quite large values of tan β ( 35) to make the annihilation cross-section efficient enough [20,21,22,23,24]. This setup has been recently excluded by extra Higgs boson searches at the LHC [25,26].…”