XENON10/100 dark matter constraints: examining the Leff dependence
Christopher Savage
TL;DR
This paper investigates how uncertainties in the scintillation efficiency factor Leff impact the dark matter constraints derived from liquid xenon detectors, especially at low recoil energies relevant to light WIMP searches.
Contribution
It provides an analysis of the effects of Leff measurement uncertainties and extrapolations on the interpretation of XENON10/100 dark matter search results.
Findings
Uncertainties in Leff significantly affect exclusion limits.
Extrapolation of Leff at low energies introduces notable variability.
Results impact the interpretation of light WIMP signals.
Abstract
The determination of dark matter constraints from liquid xenon direct detection experiments depends upon the amount of scintillation light produced by nuclear recoils in the detector, a quantity that is characterized by the scintillation efficiency factor Leff. We examine how uncertainties in the measurements of Leff and the extrapolated behavior of Leff at low recoil energies (where measurements do not exist) affect the constraints from experiments such as XENON10 and XENON100, particularly in the light WIMP regions of interest for the DAMA and CoGeNT experimental results.
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