A Search for Light Weakly-Interacting Massive Particles with SuperCDMS and Applications to Neutrino Physics

Anderson, A. J.

doi:10.2172/1352057

Cited by 3 publications

(3 citation statements)

References 106 publications

(193 reference statements)

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“…The predicted BDT distributions of signal and backgrounds for two distinct masses and detectors are shown in figure 4. For each WIMP mass, the cuts on the BDT output of each detector are selected according to the values that optimize their combined sensitivity in the simulations, based on Poisson counting as described in [39]. The expected number of background events resulting from these cuts are listed in table 2, together with their systematics as estimated by propagating the numbers quoted in section 2.3.…”

Section: Search Proceduresmentioning

confidence: 99%

Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search

Armengaud¹,

Arnaud²,

Augier³

et al. 2016

J. Cosmol. Astropart. Phys.

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We present the results of a search for elastic scattering from galactic dark matter in the form of Weakly Interacting Massive Particles (WIMPs) in the 4 − 30 GeV/c 2 mass range. We make use of a 582 kg-day fiducial exposure from an array of 800 g Germanium bolometers equipped with a set of interleaved electrodes with full surface coverage. We searched specifically for ∼ 2.5 − 20 keV nuclear recoils inside the detector fiducial volume. As an illustration the number of observed events in the search for 5 (resp. 20) GeV/c 2 WIMPs are 9 (resp. 4), compared to an expected background of 6.1 (resp. 1.4). A 90% CL limit of 4.3 × 10 −40 cm 2 (resp. 9.4 × 10 −44 cm 2 ) is set on the spin-independent WIMPnucleon scattering cross-section for 5 (resp. 20) GeV/c 2 WIMPs. This result represents a 41-fold improvement with respect to the previous EDELWEISS-II low-mass WIMP search for 7 GeV/c 2 WIMPs. The derived constraint is in tension with hints of WIMP signals from some recent experiments, thus confirming results obtained with different detection techniques.

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Section: Search Proceduresmentioning

confidence: 99%

Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search

Armengaud¹,

Arnaud²,

Augier³

et al. 2016

J. Cosmol. Astropart. Phys.

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show abstract

“…The Luke phonons are generated due to the charge carriers drifting across the detector by the external applied electric field. Taking into account the detection efficiencies for charge carriers and each type of phonon, the total phonon energy (E p ) can be expressed as [32]:…”

Section: Estimation Of ε At 50 Milli-kelvinmentioning

confidence: 99%

Average energy expended per e-h pair for germanium-based dark matter experiments

Wei

Mei

2017

J. Inst.

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We report a new result of the temperature-dependent average energy expended per electron-hole (e-h) pair, ε, for germanium detectors. Applying energy partition mechanism in ionization for a given energy deposition, the Fano factor and the value of ε can be determined separately. Subsequently, we illustrate the variation of ε as a function of temperature. The impact of ε on the energy threshold and energy scale for germanium detectors at a given temperature is evaluated. We demonstrate an absolute energy scale function of low-energy recoils for germanium detectors in the direct detection of dark matter particles.

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“…The lead decay chain was scaled to the expected number of events in the unblinded post-Cf data. Further detail on the background model and the event selection methods can be found in Adam Anderson's thesis [105].…”

Section: Background Model Developmentmentioning

confidence: 99%

Search for Low-Mass Dark Matter wtih SuperCDMS Soudan and Study of Shorted Electric Field Configurations in CDMS Detectors

Schneck¹

2015

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One of the wonderful things about working on CDMS here is that I was able to be involved with two groups: the SLAC group, led by Richard Partridge, and the Stanford group, led by Blas Cabrera. The wide range of expertise in the two groups meant that I was able to work on a wide range of projects, from scanning newly-fabricated Soudan and SNOLAB detectors, to testing high electron-mobility transistors for the SNOLAB cold electronics, to the detector simulations and data analysis that make up the bulk of my thesis. Rich and Blas have always asked challenging questions about my work and provided helpful suggestions, and I am grateful for their guidance.I would also like to thank my other committee members, Risa Wechsler and Dan Akerib, as well as my defense committee chair, Steve Sano. Risa and Dan asked really interesting questions during my defense and provided helpful feedback on my thesis.Steve was my choral director for five years in the Stanford Chamber Chorale, and I'm grateful that he was willing to take a step outside of his area of expertise to serve as my chair. This work would not have been possible without the huge amount of expertise in the CDMS collaboration. In particular, I would like to thank the members of the lowthreshold analysis team:

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A Search for Light Weakly-Interacting Massive Particles with SuperCDMS and Applications to Neutrino Physics

Cited by 3 publications

References 106 publications

Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search

Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search

Average energy expended per e-h pair for germanium-based dark matter experiments

Search for Low-Mass Dark Matter wtih SuperCDMS Soudan and Study of Shorted Electric Field Configurations in CDMS Detectors

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