Germanium Detector Response to Nuclear Recoils in Searching for Dark Matter
arXiv:1203.4620 · doi:10.1016/j.astropartphys.2012.08.006
Abstract
The discrepancies in claims of experimental evidence in the search for weakly interacting massive particle (WIMP) dark matter necessitate a model for ionization efficiency (the quenching factor) at energies below 10 keV. We have carefully studied the physics processes that contribute to the ionization efficiency through stopping power. The focus of this work is the construction of a model for the ionization efficiency in germanium by analyzing the components of stopping power, specifically that of the nuclear stopping power, at low energies. We find a fraction of the ZBL nuclear stopping power can contribute to ionization efficiency. We propose a model that corrects the missing contribution to ionization efficiency from the ZBL nuclear stopping power. The proposed model is compared to previous measurements of ionization efficiency in germanium as well as that of other theoretical models. Using this new model, the thresholds of both CDMS II and CoGeNT are analyzed and compared in terms of the nuclear recoil energy.
17 pages and 8 figures
References in corpus (11)
- First results from DAMA/LIBRA and the combined results with DAMA/NaI
- Results from 730 kg days of the CRESST-II Dark Matter Search
- Results from a Low-Energy Analysis of the CDMS II Germanium Data
- First Dark Matter Results from the XENON100 Experiment
- Exciting Dark Matter and the INTEGRAL/SPI 511 keV signal
- U-boson production in e+e- annihilations, psi and Upsilon decays, and Light Dark Matter
- Experimental constraints on a dark matter origin for the DAMA annual modulation effect
- Investigating electron interacting dark matter
- The galactic 511 keV line from electroweak scale WIMPs
- A Model of Nuclear Recoil Scintillation Efficiency in Noble Liquids
- Search for annual modulation in low-energy CDMS-II data
Cited by in corpus (24)
- Dark matter direct-detection experiments
- WIMP-Search Results from the Second CDMSlite Run
- CDMSlite: A Search for Low-Mass WIMPs using Voltage-Assisted Calorimetric Ionization Detection in the SuperCDMS Experiment
- Low-Mass Dark Matter Search with CDMSlite
- Coherent Neutrino-Nucleus Scattering and new Neutrino Interactions
- Search for Low-Mass Dark Matter with CDMSlite Using a Profile Likelihood Fit
- Constraints on elastic neutrino nucleus scattering in the fully coherent regime from the CONUS experiment
- Solar Neutrinos as a Signal and Background in Direct-Detection Experiments Searching for Sub-GeV Dark Matter With Electron Recoils
- Tests on NaI(Tl) crystals for WIMP search at the Yangyang Underground Laboratory
- Novel constraints on neutrino physics beyond the standard model from the CONUS experiment
- Direct measurement of the ionization quenching factor of nuclear recoils in germanium in the keV energy range
- Coherency and incoherency in neutrino-nucleus elastic and inelastic scattering
- Atomic limits in the search for galactic dark matter
- Search for Low-Mass Dark Matter with CsI(Tl) Crystal Detectors
- Impact of Charge Trapping on the Energy Resolution of Ge Detectors for Rare-Event Physics Searches
- Dark Matter Direct Detection of Classical WIMPs
- Ionization yield measurement in a germanium CDMSlite detector using photo-neutron sources
- Ionization Efficiency Study for Low Energy Nuclear Recoils in Germanium
- Pulse-shape discrimination between electron and nuclear recoils in a NaI(Tl) crystal
- Contribution of the electron-phonon interaction to Lindhard energy partition at low energy in Ge and Si detectors for astroparticle physics applications
- Average Energy Expended Per e-h Pair and Energy Scale Function for Germanium-Based Dark Matter Experiments
- Analysis of defect formation in semiconductor cryogenic bolometric detectors created by heavy dark matter
- Differentiating hidden sector dark matter from light WIMPs with Germanium detectors
- Calibration of nuclear recoils at the 100 eV scale using neutron capture