XENON10/100 dark matter constraints in comparison with CoGeNT and DAMA: examining the Leff dependence

Abstract

We consider the compatibility of DAMA/LIBRA, CoGeNT, XENON10 and XENON100 results for spin-independent (SI) dark matter Weakly Interacting Massive Particles (WIMPs), particularly at low masses (~ 10 GeV), assuming a standard dark matter halo. The XENON bounds depend on the scintillation efficiency factor Leff for which there is considerable uncertainty. Thus we consider various extrapolations for Leff at low energy. With the Leff measurements we consider, XENON100 results are found to be insensitive to the low energy extrapolation. We find the strongest bounds are from XENON10, rather than XENON100, due to the lower energy threshold. For reasonable choices of Leff and for the case of SI elastic scattering, XENON10 is incompatible with the DAMA/LIBRA 3$\sigma$ region and severely constrains the 7-12 GeV WIMP mass region of interest published by the CoGeNT collaboration.

23 pages, 9 figures. Version 2: more careful treatment of XENON10 efficiencies, expanded discussion. A response to arXiv:1006.2031 is found in the Appendix

References in corpus (16)

• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• First results from DAMA/LIBRA and the combined results with DAMA/NaI
• New results from DAMA/LIBRA
• The RAVE Survey: Constraining the Local Galactic Escape Speed
• First Dark Matter Results from the XENON100 Experiment
• Results from the First Science Run of the ZEPLIN-III Dark Matter Search Experiment
• Possible implications of the channeling effect in NaI(Tl) crystals
• Interpreting the recent results on direct search for dark matter particles in terms of relic neutralino
• Low-threshold analysis of CDMS shallow-site data
• DAMA and WIMP dark matter
• Channeling in direct dark matter detection I: channeling fraction in NaI (Tl) crystals
• The New DAMA Dark-Matter Window and Energetic-Neutrino Searches
• Using the Energy Spectrum at DAMA/LIBRA to Probe Light Dark Matter
• Compatibility of DAMA/LIBRA dark matter detection with other searches in light of new Galactic rotation velocity measurements
• Channeling Effect and Improvement of the Efficiency of Charged Particle Registration with Crystal Scintillators
• A coherent understanding of low-energy nuclear recoils in liquid xenon

Cited by in corpus (17)

• Results from a Low-Energy Analysis of the CDMS II Germanium Data
• The moment of truth for WIMP Dark Matter
• Complementarity of Dark Matter Direct Detection Targets
• Interfering Composite Asymmetric Dark Matter for DAMA and CoGeNT
• Global fits of the dark matter-nucleon effective interactions
• Unveiling the nature of dark matter with high redshift 21 cm line experiments
• Light mixed sneutrinos as thermal dark matter
• Channeling in direct dark matter detection II: channeling fraction in Si and Ge crystals
• Statistical coverage for supersymmetric parameter estimation: a case study with direct detection of dark matter
• On the spin-dependent sensitivity of XENON100
• The Inert Doublet Model and its Phenomenology
• Direct detection data and possible hints for low-mass WIMPs
• The Sun and stars: Giving light to dark matter
• Isospin Violating Dark Matter Search by Nuclear Emulsion Detector
• Light neutralino dark matter in light Higgs scenario related with the CoGeNT and DAMA/LIBRA results
• Dark Atoms of the Universe: towards OHe nuclear physics
• Fits to Light WIMPs