Low Threshold Results and Limits from the DRIFT Directional Dark Matter Detector
| Autor: | A. Scarff, R. Lafler, J. L. Harton, A. C. Ezeribe, F. Mouton, E. H. Miller, J.-L. Gauvreau, N. Phan, N. J. C. Spooner, Daniel P. Snowden-Ifft, E. Law, S. W. Sadler, A. Lumnah, Max Robinson, F. G. Schuckman, A. Monte, James Battat, E. R. Lee, N. Waldram, S. M. Paling, D. Loomba |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Physics - Instrumentation and Detectors 010308 nuclear & particles physics Dark matter Detector FOS: Physical sciences Astronomy and Astrophysics Instrumentation and Detectors (physics.ins-det) 01 natural sciences Neutron temperature law.invention Nuclear physics Recoil law 0103 physical sciences Shielded cable Neutron detection Astrophysics - Instrumentation and Methods for Astrophysics 010306 general physics Fiducial marker Instrumentation and Methods for Astrophysics (astro-ph.IM) Directional Recoil Identification from Tracks |
| DOI: | 10.48550/arxiv.1701.00171 |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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