Implications of XENON100 and LHC results for Dark Matter models

TL;DR

This work tests whether Xenon100 and LHC results constrain the main WIMP paradigms, including Inelastic Dark Matter, scalar singlet dark matter, and supersymmetric (CMSSM and pMSSM) scenarios. It employs a global fit with astrophysical, nuclear, and collider uncertainties, applying Xenon100 data alongside 7 TeV LHC results and B meson constraints to identify viable DM mechanisms. The findings show that iDM is disfavored as an explanation for DAMA/LIBRA, the constrained scalar singlet is constrained, and in SUSY, the well-tempered neutralino and Higgs-resonance regions are excluded, pushing viable DM toward heavier sparticles with increased fine-tuning; slepton co-annihilation remains a plausible mechanism. 2012 updates tighten these conclusions, with scalar singlet DM surviving only for $M_{ m DM} \gtrsim 100$ GeV and well-tempered bino/higgsino excluded, while pMSSM maintains similar qualitative constraints. Overall, direct-detection and collider data provide complementary, overlapping coverage that significantly narrows the viable DM parameter space across non-SUSY and SUSY models.

Abstract

We perform a fit to the recent Xenon100 data and study its implications for Dark Matter scenarios. We find that Inelastic Dark Matter is disfavoured as an explana- tion to the DAMA/LIBRA annual modulation signal. Concerning the scalar singlet DM model, we find that the Xenon100 data disfavors its constrained limit. We study the CMSSM as well as the low scale phenomenological MSSM taking into account latest Tevatron and LHC data (1.1/fb) about sparticles and Bs \rightarrow μμ. After the EPS 2011 conference, LHC excludes the "Higgs-resonance" region of DM freeze-out and Xenon100 disfavors the "well-tempered" bino/higgsino, realized in the "focus-point" region of the CMSSM parameter space. The preferred region shifts to heavier sparticles, higher fine-tuning, higher tan β and the quality of the fit deteriorates.

Figures (12)

• Figure 1: The 95, 99.7% confidence level contours for 2 d.o.f. for the DAMA modulated signal under the assumption of elastic scattering on sodium atoms. We assume different values of the sodium quenching factor, 0.2, 0.3, 0.4 and 0.5, from right to left. The blue lines are the Xenon100 exclusion curves at 95% (continuous curve), 99.7% (dashed) confidence level. We assume $v_0=220\, {\rm km\,s^{-1}}$ and $v_{esc}=544\,{\rm km\,s^{-1}}$ for the DAMA fit. We neglect channeling.
• Figure 2: The 95, 99.7% confidence level contours for 2 d.o.f. for iDM fit to DAMA, together with the 95, 99.7% exclusion curves from Xenon100 data (full and dashed respectively). We fix the iodine quenching factor to 0.085. Sodium quenching and channeling are irrelevant for these values of the mass.
• Figure 3: Predictions of the scalar singlet model for a few values of the Higgs boson mass: 115 GeV (green), 140 GeV (yellow), 200 GeV (red), 300 GeV (magenta). The dots are the predictions of the constrained model of Kadastik:2009djCDMSth.
• Figure 4: The ($M_{\rm DM},\sigma_{\rm SI}$) plane in the CMSSM. In the left panel we show the global fit: the yellow regions surrounded by continuous contours are the best fit including the Xenon100 and LHC data, at $68,95,99.7\%$ confidence levels for 2 d.o.f. The red (blue) regions surrounded by dashed contours are the corresponding regions now excluded by Xenon100 (LHC). In the right panel we show points with $\Delta\chi^2<4^2$, colored according to the DM annihilation mechanism. The red dots in the upper region excluded by the Xenon100 correspond to the "well-tempered" neutralino, green via the heavy Higgs resonance, cyan via neutral Higgses with $\tan\beta$-enhanced couplings, blue via slepton co-annihilations, magenta via stop co-annihilations.
• Figure 5: Global CMSSM fits in $(m_0, M_{1/2})$ (left) and in $(\mu, M_{1/2})$ (right) planes. The red (blue) contours are excluded by Xenon100 (LHC), other details are as in Fig. \ref{['fig:CMSSMfits3']}a.