First Search for Light Dark Matter in the Neutrino Fog with XENONnT

Abstract

We search for dark matter (DM) with a mass [3,12] $\mathrm{GeV}/c^2$ using an exposure of 3.51 $\mathrm{t}\times \mathrm{y}$ with the XENONnT experiment.We consider spin-independent DM-nucleon interactions mediated by a heavy or light mediator, spin-dependent DM-neutron interactions, momentum-dependent DM scattering, and mirror DM. Using a lowered energy threshold compared to the previous WIMP search, a blind analysis of [0.5, 5.0] $\mathrm{keV}$ nuclear recoil events reveals no significant signal excess over the background. XENONnT excludes spin-independent DM-nucleon cross sections $>2.5\times 10^{-45}{\mathrm{cm}}^2$ at $90\%$ confidence level for 6 $\mathrm{GeV}/c^2$ DM. In the considered mass range, the DM sensitivity approaches the 'neutrino fog', the limitation where neutrinos produce a signal that is indistinguishable from that of light DM-xenon nucleus scattering.

References in corpus (14)

• First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
• Asymmetric Dark Matter
• First Dark Matter Search with Nuclear Recoils from the XENONnT Experiment
• Search for New Physics in Electronic Recoil Data from XENONnT
• Multi-Component Dark Matter
• Fog on the horizon: a new definition of the neutrino floor for direct dark matter searches
• Complementarity of dark matter detectors in light of the neutrino background
• Search for Coherent Elastic Scattering of Solar ${}^8$B Neutrinos in the XENON1T Dark Matter Experiment
• Search for light dark matter with ionization signals in the PandaX-4T Experiment
• Conceptual design and simulation of a water Cherenkov muon veto for the XENON1T experiment
• The XENONnT Dark Matter Experiment
• A First Search for Solar ${}^8$B Neutrino in the PandaX-4T Experiment using Neutrino-Nucleus Coherent Scattering
• Search for Dark-Matter-Nucleon Interactions with a Dark Mediator in PandaX-4T
• Design, construction and commissioning of a high-flow radon removal system for XENONnT

Cited by in corpus (12)

• Bounds on new neutrino interactions from the first CE$\nu$NS data at direct detection experiments
• Search for Light Dark Matter in Low-Energy Ionization Signals from XENONnT
• New Physics Search at the CEPC: a General Perspective
• Search for Light Dark Matter with 259-day data in PandaX-4T
• Multi-Messenger and Cosmological Constraints on Dark Matter through Two-Fluid Neutron Star Modeling
• New constraints on cosmic ray-boosted dark matter from the LUX-ZEPLIN experiment
• Dark matter as the source of neutrino mass: theory overview and experimental prospects
• New light mediators and the neutrino fog: Implications from XENONnT nuclear recoil data
• Light Dark Matter Search with 7.8 Tonne-Year of Ionization-Only Data in XENONnT
• Probing the Solar ${}^8$B Neutrino Fog with XENONnT
• Photonic Freeze-In
• Axion-like Particle Search with a Light-Shining-Through-Walls Setup at a $\gamma$-$\gamma$ Collider