Search for dark matter annual modulation with DarkSide-50
The DarkSide-50 Collaboration: P. Agnes, I.F.M. Albuquerque, T., Alexander, A.K. Alton, M. Ave, H.O. Back, G. Batignani, K. Biery, V. Bocci,, W.M. Bonivento, B. Bottino, S. Bussino, M. Cadeddu, M. Cadoni, F. Calaprice,, A. Caminata, M.D. Campos, N. Canci, M. Caravati
TL;DR
This paper reports a search for annual modulation in dark matter signals using the DarkSide-50 liquid argon detector, finding no significant evidence of such modulation above 40 eVee.
Contribution
It presents the lowest energy threshold search for dark matter annual modulation using liquid argon TPC technology.
Findings
No significant annual modulation signal detected
Achieved the lowest energy threshold of 40 eVee
Set new limits on dark matter interaction rates
Abstract
Dark matter induced event rate in an Earth-based detector is predicted to show an annual modulation as a result of the Earth's orbital motion around the Sun. We searched for this modulation signature using the ionization signal of the DarkSide-50 liquid argon time projection chamber. No significant signature compatible with dark matter is observed in the electron recoil equivalent energy range above , the lowest threshold ever achieved in such a search.
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Photocathodes and Microchannel Plates · CCD and CMOS Imaging Sensors