کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8141936 | 1523856 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
First background-free limit from a directional dark matter experiment: Results from a fully fiducialised DRIFT detector
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: First background-free limit from a directional dark matter experiment: Results from a fully fiducialised DRIFT detector First background-free limit from a directional dark matter experiment: Results from a fully fiducialised DRIFT detector](/preview/png/8141936.png)
چکیده انگلیسی
The addition of O2 to gas mixtures in time projection chambers containing CS2 has recently been shown to produce multiple negative ions that travel at slightly different velocities. This allows a measurement of the absolute position of ionising events in the z  (drift) direction. In this work, we apply the z-fiducialisation technique to a directional dark matter search. We present results from a 46.3 live-day source-free exposure of the DRIFT-IId detector run in this new mode. With full-volume fiducialisation, we have achieved the first background-free operation of a directional detector. The resulting exclusion curve for spin-dependent WIMP-proton interactions reaches 1.1 pb at 100 GeV/c2, a factor of 2 better than our previous work. We describe the automated analysis used here, and argue that detector upgrades, implemented after the acquisition of these data, will bring an additional factor of â³3 improvement in the near future.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics of the Dark Universe - Volumes 9â10, SeptemberâDecember 2015, Pages 1-7
Journal: Physics of the Dark Universe - Volumes 9â10, SeptemberâDecember 2015, Pages 1-7
نویسندگان
J.B.R. Battat, J. Brack, E. Daw, A. Dorofeev, A.C. Ezeribe, J.-L. Gauvreau, M. Gold, J.L. Harton, J.M. Landers, E. Law, E.R. Lee, D. Loomba, A. Lumnah, J.A.J. Matthews, E.H. Miller, A. Monte, F. Mouton, A.StJ. Murphy, L. Yuriev,