Extending light WIMP searches to single scintillation photons in LUX

Akerib, DS, Alsum, S, Araujo, HM, Bai, X, Balajthy, J, Baxter, A, Beltrame, P, Bernard, EP, Bernstein, A, Biesiadzinski, TP
et al (show 92 more authors) (2020) Extending light WIMP searches to single scintillation photons in LUX. PHYSICAL REVIEW D, 101 (4).

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We present a novel analysis technique for liquid xenon time projection chambers that allows for a lower threshold by relying on events with a prompt scintillation signal consisting of single detected photons. The energy threshold of the LUX dark matter experiment is primarily determined by the smallest scintillation response detectable, which previously required a twofold coincidence signal in its photomultiplier arrays, enforced in data analysis. The technique presented here exploits the double photoelectron emission effect observed in some photomultiplier models at vacuum ultraviolet wavelengths. We demonstrate this analysis using an electron recoil calibration dataset and place new constraints on the spin-independent scattering cross section of weakly interacting massive particles (WIMPs) down to 2.5 GeV/c2 WIMP mass using the 2013 LUX dataset. This new technique is promising to enhance light WIMP and astrophysical neutrino searches in next-generation liquid xenon experiments.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 13 May 2020 10:11
Last Modified: 18 Jan 2023 23:53
DOI: 10.1103/PhysRevD.101.042001
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3085666