Akerib, DS;
Araújo, HM;
Bai, X;
Bailey, AJ;
Balajthy, J;
Beltrame, P;
Bernard, EP;
... Pease, EK; + view all
(2016)
Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX Data.
Physical Review Letters
, 116
(16)
, Article 161301. 10.1103/PhysRevLett.116.161301.
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Abstract
We present constraints on weakly interacting massive particles (WIMP)-nucleus scattering from the 2013 data of the Large Underground Xenon dark matter experiment, including 1.4×104 kg day of search exposure. This new analysis incorporates several advances: single-photon calibration at the scintillation wavelength, improved event-reconstruction algorithms, a revised background model including events originating on the detector walls in an enlarged fiducial volume, and new calibrations from decays of an injected tritium β source and from kinematically constrained nuclear recoils down to 1.1 keV. Sensitivity, especially to low-mass WIMPs, is enhanced compared to our previous results which modeled the signal only above a 3 keV minimum energy. Under standard dark matter halo assumptions and in the mass range above 4 GeV c-2, these new results give the most stringent direct limits on the spin-independent WIMP-nucleon cross section. The 90% C.L. upper limit has a minimum of 0.6 zb at 33 GeV c-2 WIMP mass.
| Type: | Article |
|---|---|
| Title: | Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX Data |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.116.161301 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.116.161301 |
| Language: | English |
| Additional information: | Copyright © 2016 American Physical Society. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1493349 |
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