Recent results from the CDMS-II experiment
نویسنده
چکیده
The Cryogenic Dark Matter Search experiment (CDMS) employs low-temperature Ge and Si detectors to detect WIMPs via their elastic scattering interaction with the target nuclei. The current analysis of 397.8 kg-days Ge exposure resulted in zero observed candidate events, setting an upper limit on the spin-independent WIMP-nucleon cross-section of 6.6× 10 cm (4.6× 10 cm, when previous CDMS Soudan data is included) at the 90% confidence level for a WIMP mass of 60GeV. To increase the sensitivity, new one inch thick detectors have been developed which will be used in the SuperCDMS phase. SuperCDMS 25kg will be operated at SNOLAB with an expected sensitivity on the spinindependent WIMP-nucleon elastic scattering cross-section of 1× 10 cm.
منابع مشابه
Reconciling the positive DAMA annual modulation signal with the negative results of the CDMS II experiment
We examine the recent CDMS II results in the context of the mirror matter interpretation of the DAMA/NaI experiment. We find that the favoured mirror matter interpretation of the DAMA/NaI experiment – a He ′ /H ′ dominated halo with a small O ′ component is fully consistent with the null results reported by CDMS II. While the CDMS II experiment is quite sensitive to a heavy F e ′ component, and...
متن کاملDetector commissioning for the CDMS-II final run at the Soudan Underground Laboratory
CDMS-II uses detectors known as Z-sensitive ionization phonons (ZIPs) to search for weakly interacting massive particles (WIMPs), a very promising candidate for the dark matter in the universe. The most recent data run utilized 12 ZIP detectors (six Ge and six Si) running for 1 2 year at the Soudan deep underground laboratory (780m below surface), resulting in the current world’s highest sensit...
متن کاملCold Dark Matter Searches with the CDMS-II Experiment
The CDMS-II collaboration operates an experiment at the Soudan Mine, Minnesota to directly detect cold dark matter in the form of Weakly Interacting Massive Particles. The detectors are Ge (and Si) crystals of mass 250 g (100 g) cooled to 30 mK and detect both the ionization and athermal phonon signals after a particle interacts in the Ge (Si) material. The athermal phonon readout utilizes supe...
متن کاملThe unbearable lightness of being: CDMS versus XENON
The CDMS-II collaboration has reported 3 events in a Si detector, which are consistent with being nuclear recoils due to scattering of Galactic dark matter particles with a mass of ∼ 8.6 GeV and a cross-section on neutrons of ∼ 2 × 10−41 cm2. While a previous result from the XENON10 experiment has supposedly ruled out such particles as dark matter, we find by reanalysing the XENON10 data that t...
متن کاملDAMA / NaI and CDMS experiments for mirror matter - type dark matter
We re-analyse the implications of the DAMA/NaI experiment for mirror matter-type dark matter, taking into account information from the energy dependence of the DAMA annual modulation signal. This is combined with the null results from the CDMS experiment, leading to fairly well defined allowed regions of parameter space. The allowed regions of parameter space will be probed in the near future b...
متن کامل