Low Energy WIMP Search Results from CDMS
description
Transcript of Low Energy WIMP Search Results from CDMS
![Page 1: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/1.jpg)
Pheno 2011 1
Low Energy WIMP Search Results from
CDMSLauren Hsu
Fermilabfor
the CDMS CollaborationSlide material contributed by David Moore
![Page 2: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/2.jpg)
Pheno 2011 2
Low Mass WIMPs
![Page 3: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/3.jpg)
Pheno 2011 3
Lowering the CDMS Threshold• Lowering analysis threshold below 10 keV yields sensitivity to low
mass WIMPs in region of contention.• The cost = sacrifice some background rejection due to worsening
timing resolution. Accept > 1 event background.
![Page 4: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/4.jpg)
Pheno 2011 4
Low Threshold Dataset
![Page 5: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/5.jpg)
Pheno 2011 5
Energy Calibration
![Page 6: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/6.jpg)
Pheno 2011 6
Candidate Events
![Page 7: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/7.jpg)
Pheno 2011 7
90% C.L. Limits
![Page 8: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/8.jpg)
Pheno 2011 8
Background Composition
![Page 9: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/9.jpg)
Pheno 2011 9
Comparison to CoGeNT Data
![Page 10: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/10.jpg)
Pheno 2011 10
Naive Energy Rescaling
![Page 11: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/11.jpg)
Pheno 2011 11
Summary• Presented analysis of CDMSII data with threshold
lowered from 10 to 2 keV• Backgrounds present in this analysis have been
characterized. No excess events over expected background were observed
• Despite no background subtraction, observed rate of events is incompatible with interpretation of CoGeNT and DAMA data as evidence for spin-independent elastic scattering of WIMPs
• Compatibility between CDMS and CoGeNT data requires majority of CoGeNT excess to be due to background and unexpectedly small CDMS background
Ahmed et al., PRL 106 131302 (2011), arXiv: 1011.2482
![Page 12: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/12.jpg)
Pheno 2011 12
Shallow Site Comparison
![Page 13: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/13.jpg)
Pheno 2011 13
Zero Charge Events
![Page 14: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/14.jpg)
Pheno 2011 14
Background Composition
![Page 15: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/15.jpg)
Pheno 2011 15
Candidate Events
![Page 16: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/16.jpg)
Pheno 2011 16
Rate by Detector
![Page 17: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/17.jpg)
Pheno 2011 17
CDMSLITE
![Page 18: Low Energy WIMP Search Results from CDMS](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815ef8550346895dcdb61d/html5/thumbnails/18.jpg)
Pheno 2011 18
blank