The Large Underground Xenon (LUX) experiment

126

123

We investigate a strategy to search for light, nearly degenerate higgsinos within the natural MSSM at the LHC. We demonstrate that the higgsino mass range µ in 100 − 160 GeV, which is preferred by the naturalness, can be probed at 3σ significance through the monojet search at 14 TeV HL-LHC with 3000 fb −1 luminosity. The proposed method can also probe certain region in the parameter space for the lightest neutralino with a high higgsino purity, that cannot be reached by planned direct detection experiments at XENON-1T(2017).

Section: Calculations and Discussionmentioning

confidence: 91%

“…The horizontal lines show the 90% C.L. bound from XENON100 [71], future sensitivities at LUX [72] and XENON1T [73], respectively. The vertical dashed line is the sensitivity of monojet signals at 3σ significance at 14 TeV LHC with L = 3000 fb −1 .…”

Section: Calculations and Discussionmentioning

confidence: 99%

Probing light higgsinos in natural SUSY from monojet signals at the LHC

Han

Kobakhidze

Liu

et al. 2014

126

123

“…The solid line indicates the current limit from XENON100 data [119]. We also show the projected limits from XENON1T [120] and LUX [121] experiments. As evident from the plot, a few of the allowed points are already ruled out by the XENON100 data, while all of the low-mass points satisfying the relic density constraints can be ruled out by LUX and XENON1T projected limits in case of a null result.…”

Section: Light Sneutrino Dmmentioning

confidence: 99%

Invisible Higgs decay in a supersymmetric inverse seesaw model with light sneutrino dark matter

Banerjee

Dev

Mondal

et al. 2013

Within the framework of a constrained Minimal Supersymmetric Standard Model (cMSSM) augmented by an MSSM singlet-pair sector to account for the non-zero neutrino masses by inverse seesaw mechanism, the lightest supersymmetric particle (LSP) can be a mixed sneutrino with mass as small as 50 GeV, satisfying all existing constraints, thus qualifying as a light dark matter candidate. We study the possibility of the lightest neutral Higgs boson in this model decaying invisibly into a pair of sneutrino LSPs, thereby giving rise to novel missing energy signatures at the LHC. We perform a two-parameter global analysis of the LHC Higgs data available till date to determine the optimal invisible Higgs branching fraction in this scenario, and obtain a 2σ (1σ) upper limit of 0.25 (0.15). A detailed cut-based analysis is carried out thereafter, demonstrating the viability of our proposed signal vis-a-vis backgrounds at the LHC.

“…We found that the typical scattering cross section around the benchmark point is a little smaller than a current experimental bound by LUX [54], and proposed future experiments for the direct dark matter search can probe around this benchmark point [55][56][57][58].…”

Section: Jhep01(2016)030mentioning

confidence: 99%

ATLAS on-Z excess via gluino-Higgsino-singlino decay chains in the NMSSM

Harigaya

Ibe

Kitahara

2016

Recently the ATLAS experiment has reported 3.0 σ excess in an on-Z signal region in searches for supersymmetric particles. We find that the next-to-minimal supersymmetric standard model can explain this excess by the production of gluinos which mainly decay viag → gχ 0 2,3 → gZχ 0 1 whereχ 0 2,3 andχ 0 1 are the Higgsino and the singlinolike neutralinos, respectively. We show that the observed dark matter density is explained by the thermal relic density of the singlino-like neutralino, simultaneously. We also discuss the searches for the Higgs sector of this scenario at the Large Hadron Collider.