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

Schneck, K.

doi:10.2172/1352049

Cited by 8 publications

(17 citation statements)

References 108 publications

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“…This indicates that the low-threshold results from the Ge detectors are marginally compatible with the Si-detector measurements taken during the same data period, under standard assumptions. Comparisons of such direct detection results on different nuclei will be a powerful tool for understanding WIMP dark matter both in terms of the fundamental WIMP interactions [86,87] and possible backgrounds.…”

Section: Discussionmentioning

confidence: 99%

Improved WIMP-search reach of the CDMS II germanium data

Agnese¹,

Anderson²,

Asai³

et al. 2015

Phys. Rev. D

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CDMS II data from the 5-tower runs at the Soudan Underground Laboratory were reprocessed with an improved charge-pulse fitting algorithm. Two new analysis techniques to reject surfaceevent backgrounds were applied to the 612 kg days germanium-detector WIMP-search exposure. An extended analysis was also completed by decreasing the 10 keV analysis threshold to ∼5 keV, to increase sensitivity near a WIMP mass of 8 GeV/c 2 . After unblinding, there were zero candidate events above a deposited energy of 10 keV and 6 events in the lower-threshold analysis. This yielded minimum WIMP-nucleon spin-independent scattering cross-section limits of 1.8×10 −44 and 1.18×10 −41 cm 2 at 90% confidence for 60 and 8.6 GeV/c 2 WIMPs, respectively. This improves the previous CDMS II result by a factor of 2.4 (2.7) for 60 (8.6) GeV/c 2 WIMPs.PACS numbers: 95.35.+d, 95.30.Cq, 85.25.Oj, 29.40.Wk

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Section: Discussionmentioning

confidence: 99%

Improved WIMP-search reach of the CDMS II germanium data

Agnese¹,

Anderson²,

Asai³

et al. 2015

Phys. Rev. D

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“…By comparing the energy spectra and number of events in several experiments using different target nuclei, it may be possible to determine which form factor (and therefore which operator) is mediating the interaction (see e.g. [29]). However, many NREFT operators lead to interactions with the same form factor.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, it enables us explore possible blind spots in the sensitivity of current experiments. To this end, a number of authors have presented constraints on these operators from current and future direct detection [26][27][28][29][30][31] and neutrino telescope data [32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

New directional signatures from the nonrelativistic effective field theory of dark matter

Kavanagh

2015

Phys. Rev. D

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The framework of non-relativistic effective field theory (NREFT) aims to generalise the standard analysis of direct detection experiments in terms of spin-dependent (SD) and spin-independent (SI) interactions. We show that a number of NREFT operators lead to distinctive new directional signatures, such as prominent ring-like features in the directional recoil rate, even for relatively low mass WIMPs. We discuss these signatures and how they could affect the interpretation of future results from directional detectors. We demonstrate that considering a range of possible operators introduces a factor of 2 uncertainty in the number of events required to confirm the median recoil direction of the signal. Furthermore, using directional detection, it is possible to distinguish the more general NREFT interactions from the standard SI/SD interactions at the 2σ level with O(100 − 500) events. In particular, we demonstrate that for certain NREFT operators, directional sensitivity provides the only method of distinguishing them from these standard operators, highlighting the importance of directional detectors in probing the particle physics of dark matter.

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“…Most recently, we studied the oblique propagation of electrons and holes in semiconductors both theoretically and experimentally [16]. By utilizing CDMS Detector Monte Carlo (DMC techniques, we were able to identify the cause of excess background signals present in one of our CDMS dark matter detectors (T5Z3 -the detector had a shorted outer electric charge line [17].…”

Section: Detector Technology: Charge and Phononmentioning

confidence: 99%

Phonon Sensor Dynamics for Cryogenic Dark Matter Search Experiment

Yen¹

2015

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D energy distribution plots for inverted QP test devices for three different Al-film lengths (250 µm, 350 µm and 500 µm with three different Al-film thickness (300 nm, 500 nm and 900 nm. For a given Al film thickness (horizontal trend , total energy collected by TES 1 and TES 2 is greater (data more diagonal, less loss to substrate for central x-ray events in the shorter Al films. For a given Al film length

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

Cited by 8 publications

References 108 publications

Improved WIMP-search reach of the CDMS II germanium data

Improved WIMP-search reach of the CDMS II germanium data

New directional signatures from the nonrelativistic effective field theory of dark matter

Phonon Sensor Dynamics for Cryogenic Dark Matter Search Experiment

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