Fueling the search for light dark matter-electron scattering with spherical proportional counters

Hamaide, Louis; McCabe, Christopher

doi:10.1103/physrevd.107.063002

Cited by 8 publications

(2 citation statements)

References 132 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 given in the work [114] to derive our results. However, the ionization form factor provided in their research does not adequately describe the ionization behavior of transfer momentum q below 1 keV, hence we employ dipole approximation to extend it,…”

Section: Jcap04(2023)020mentioning

confidence: 92%

Spin-dependent sub-GeV inelastic dark matter-electron scattering and Migdal effect. Part I. Velocity independent operator

et al. 2023

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

The ionization signal provide an important avenue of detecting light dark matter. In this work, we consider the sub-GeV inelastic dark matter and use the non-relativistic effective field theory (NR-EFT) to derive the constraints on the spin-dependent DM-electron scattering and DM-nucleus Migdal scattering. Since the recoil electron spectrum of sub-GeV DM is sensitive to tails of galactic DM velocity distributions, we also compare the bounds on corresponding scattering cross sections in Tsallis, Empirical and standard halo models. With the XENON1T data, we find that the exclusion limits of the DM-proton/neutron and DM-electron scattering cross sections for exothermic inelastic DM are much stronger that those for the endothermic inelastic DM. Each limits of the endothermic inelastic DM can differ by an order of magnitude at most in three considered DM velocity distributions.

show abstract

Section: Jcap04(2023)020mentioning

confidence: 92%

Spin-dependent sub-GeV inelastic dark matter-electron scattering and Migdal effect. Part I. Velocity independent operator

et al. 2023

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

show abstract

“…The projected sensitivity of ECuME and DarkSPHERE in a DM-nucleon spin-independent cross-section versus DM mass is shown in Figure 3. A publication is under preparation which will detail the wider physics potential of DarkSPHERE, including spin-dependent nucleon interactions, DM-electron interactions [25], and other rare-event searches.…”

Section: Future Fully Electroformed Detectorsmentioning

confidence: 99%

Status and future prospects of the NEWS-G experiment

Knights

2023

SciPost Phys. Proc.

View full text Add to dashboard Cite

The NEWS-G collaboration is searching for light dark matter using spherical proportional counters. Access to the mass range from 50 MeV to 10 GeV is enabled by the combination of low energy threshold, light gaseous targets (H, He, Ne), and highly radio-pure detector construction. Several of the recent developments that have paved the way for the operation of a new 140 cm in diameter, spherical proportional counter are presented. Constructed and commissioned at LSM using 4N copper with a 500\muμxm electroplated inner layer, the detector is now installed in SNOLAB, where it has begun data taking. Building on the electroplating of the current detector, the collaboration construct its next detector directly in the underground laboratory, using ultra-pure copper electroforming. The design and construction of ECUME, a 140 cm in diameter spherical proportional counter fully electroformed underground is discussed, along with the potential to achieve sensitivity reaching the neutrino floor in light Dark Matter searches with a next-generation detector.

show abstract

Solar reflection of dark matter with dark-photon mediators

Emken,

Essig,

2024

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

We consider the scattering of low-mass halo dark-matter particles in the hot plasma of the Sun, focusing on dark matter that interact with ordinary matter through a dark-photon mediator. The resulting “solar-reflected” dark matter (SRDM) component contains high-velocity particles, which significantly extend the sensitivity of terrestrial direct-detection experiments to sub-MeV dark-matter masses. We use a detailed Monte Carlo simulation to model the propagation and scattering of dark-matter particles in the Sun, including thermal effects, with special emphasis on ultralight dark-photon mediators. We study the properties of the SRDM flux, obtain exclusion limits from various direct-detection experiments, and provide projections for future experiments, focusing especially on those with silicon and xenon targets. We find that proposed future experiments with xenon and silicon targets can probe the entire “freeze-in benchmark”, in which dark matter is coupled to an ultralight dark photon, including dark-matter masses as low as 𝒪(keV). Our simulations and SRDM fluxes are publicly available.

show abstract

Fueling the search for light dark matter-electron scattering with spherical proportional counters

Cited by 8 publications

References 132 publications

Spin-dependent sub-GeV inelastic dark matter-electron scattering and Migdal effect. Part I. Velocity independent operator

Spin-dependent sub-GeV inelastic dark matter-electron scattering and Migdal effect. Part I. Velocity independent operator

Status and future prospects of the NEWS-G experiment

Solar reflection of dark matter with dark-photon mediators

Contact Info

Product

Resources

About