New constraints on WIMPs from the Canfranc IGEX dark matter search
A. Morales (1), C.E. Aalseth (2), F.T. Avignone III (2), R. L., Brodzinski (3), S. Cebrian (1), E. Garcia (1), D. Gonzalez (1), W. K. Hensley, (3), I. G. Irastorza (1), I. V. Kirpichnikov (4), A. A. Klimenko (5), H. S., Miley (3), J. Morales (1), A. Ortiz de Solorzano (1)
TL;DR
This paper reports new constraints on WIMP dark matter particles using data from the IGEX germanium detectors, improving existing exclusion limits and suggesting future testing potential in the DAMA region.
Contribution
It presents the first WIMP search results from the upgraded IGEX germanium detectors, setting new exclusion limits and demonstrating the potential for future dark matter detection.
Findings
Improved exclusion limits in the ~50 GeV WIMP mass region.
Data from 30 days of operation with a 4 keV threshold.
Potential to test the DAMA region with increased exposure.
Abstract
The IGEX Collaboration enriched 76Ge double-beta decay detectors are currently operating in the Canfranc Underground Laboratory with an overburden of 2450 m.w.e. A recent upgrade has made it possible to use them in a search for WIMPs. A new exclusion plot has been derived for WIMP-nucleon spin-independent interaction. To obtain this result, 30 days of data from one IGEX detector, which has an energy threshold of ~4 keV, have been considered. These data improve the exclusion limits derived from other germanium diode experiments in the ~50 GeV DAMA region, and show that with a moderate improvement of the background below 10 keV, the DAMA region may be tested with an additional 1 kg-year of exposure.
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