학술논문
Low Threshold Results and Limits from the DRIFT Directional Dark Matter Detector
Document Type
Working Paper
Author
Battat, J. B. R.; Ezeribe, A. C.; Gauvreau, J. -L.; Harton, J. L.; Lafler, R.; Law, E.; Lee, E. R.; Loomba, D.; Lumnah, A.; Miller, E. H.; Monte, A.; Mouton, F.; Paling, S. M.; Phan, N. S.; Robinson, M.; Sadler, S. W.; Scarff, A.; Schuckman II, F. G.; Snowden-Ifft, D. P.; Spooner, N. J. C.; Waldram, N.
Source
Subject
Language
Abstract
We present results from a 54.7 live-day shielded run of the DRIFT-IId detector, the world's most sensitive, directional, dark matter detector. Several improvements were made relative to our previous work including a lower threshold for detection, a more robust analysis and a tenfold improvement in our gamma rejection factor. After analysis, no events remain in our fiducial region leading to an exclusion curve for spin-dependent WIMP-proton interactions which reaches 0.28 pb at 100 GeV/c^2 a fourfold improvement on our previous work. We also present results from a 45.4 live-day unshielded run of the DRIFT-IId detector during which 14 nuclear recoil-like events were observed. We demonstrate that the observed nuclear recoil rate of 0.31+/-0.08 events per day is consistent with detection of ambient, fast neutrons emanating from the walls of the Boulby Underground Science Facility.
Comment: Uploaded version 3 with minor changes after referee comments
Comment: Uploaded version 3 with minor changes after referee comments