Results of a Search for Sub-GeV Dark Matter Using 2013 LUX Data

Akerib, DS, Alsum, S, Araujo, HM, Bai, X, Balajthy, J, Beltrame, P, Bernard, EP, Bernstein, A, Biesiadzinski, TP, Boulton, EM
et al (show 89 more authors) (2019) Results of a Search for Sub-GeV Dark Matter Using 2013 LUX Data. PHYSICAL REVIEW LETTERS, 122 (13). 131301-.

Access the full-text of this item by clicking on the Open Access link.


The scattering of dark matter (DM) particles with sub-GeV masses off nuclei is difficult to detect using liquid xenon-based DM search instruments because the energy transfer during nuclear recoils is smaller than the typical detector threshold. However, the tree-level DM-nucleus scattering diagram can be accompanied by simultaneous emission of a bremsstrahlung photon or a so-called “Migdal” electron. These provide an electron recoil component to the experimental signature at higher energies than the corresponding nuclear recoil. The presence of this signature allows liquid xenon detectors to use both the scintillation and the ionization signals in the analysis where the nuclear recoil signal would not be otherwise visible. We report constraints on spin-independent DM-nucleon scattering for DM particles with masses of 0.4 – 5 GeV/c^2 using 1.4×10^4  kg day of search exposure from the 2013 data from the Large Underground Xenon (LUX) experiment for four different classes of mediators. This analysis extends the reach of liquid xenon-based DM search instruments to lower DM masses than has been achieved previously.

Item Type: Article
Uncontrolled Keywords: LUX Collaboration
Depositing User: Symplectic Admin
Date Deposited: 30 Apr 2019 07:23
Last Modified: 19 Jan 2023 00:54
DOI: 10.1103/PhysRevLett.122.131301
Open Access URL:
Related URLs: