17-22 July 2016
Master Cutlers Hall
Europe/London timezone

Background Subtracting the Search for Annual Modulation in CDMS II

20 Jul 2016, 16:50
20m
Venue: Cutlers' Main Hall (First Floor); Chair: Yeongduk Kim; Session Manager: David Woodward ()

Venue: Cutlers' Main Hall (First Floor); Chair: Yeongduk Kim; Session Manager: David Woodward

Speaker

Danielle Speller (University of California, Berkeley)

Description

Weakly Interacting Massive Particles (WIMPs) are one of the leading candidates for the undetected mass component comprising ~27% of the observable universe. An excess in the nuclear-recoil event rate measured by a detector, combined with an annual periodicity introduced by the revolution of the Earth about the Sun, is an important indicator of the direct detection of particle dark matter. The Cryogenic Dark Matter Search (CDMS) experiment uses semiconductor crystals to search for WIMPs scattering from atomic nuclei through the simultaneous measurement of ionization and athermal phonons. This technique has achieved excellent discrimination between nuclear recoils (expected for WIMP interactions) and radioactively induced electron recoils, enabling a sensitive search for an annually modulating signal. Building upon the initial search for annual modulation in CDMS II in 2012, I will discuss results updated to include subtraction of the dominant backgrounds, and describe implications for interpretations of other direct search experiments.

Primary author

Danielle Speller (University of California, Berkeley)

Presentation Materials

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