Solar neutrinos and dark matter detection with diurnal modulation

Sassi, Sebastian; Heikinheimo, Matti; Mirabolfathi, N.; Nordlund, K.; Safari, Hossein; Tuominen, Kimmo

doi:10.1103/physrevd.104.063037

Cited by 17 publications

(15 citation statements)

References 23 publications

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“…A small difference in the tails of the recoil spectra could in principle be used as a discrimination tool, but it would require thousands of neutrino events, making it impractical with any proposed future experiment. Other methods for circumventing the neutrino floor have been proposed, such as utilizing timing information [43,44] or complementarity between detectors [45]. Nevertheless, in the low-statistics limit, directional detection appears to be the only feasible method [17,18].…”

Section: Wimp Detection Below Neutrino Floor 21 Neutrino Floormentioning

confidence: 99%

“…Despite the similarities between the signals, a conventional DM search would have been possible if there had been a precise understanding of neutrino background levels. Recently some have advocated using the term "neutrino fog" rather than "neutrino floor", implying a challenging, but not impossible signal-background discrimination [43][44][45][46][47][48]. Even though neutrino-nucleus cross sections are relatively accurately determined, neutrino fluxes are typically subject to large systematic uncertainties, causing large uncertainties in the number of expected neutrino events [49].…”

Section: Wimp Detection Below Neutrino Floor 21 Neutrino Floormentioning

confidence: 99%

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Directional Detection of Dark Matter Using Solid-State Quantum Sensing

Ebadi¹,

Marshall²,

Phillips³

et al. 2022

Preprint

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Next-generation dark matter (DM) detectors searching for weakly interacting massive particles (WIMPs) will be sensitive to coherent scattering from solar neutrinos, demanding an efficient background-signal discrimination tool. Directional detectors improve sensitivity to WIMP DM despite the irreducible neutrino background. Widebandgap semiconductors offer a path to directional detection in a high-density target material. A detector of this type operates in a hybrid mode. The WIMP or neutrinoinduced nuclear recoil is detected using real-time charge, phonon, or photon collection. The directional signal, however, is imprinted as a durable sub-micron damage track in the lattice structure. This directional signal can be read out by a variety of atomic physics techniques, from point defect quantum sensing to x-ray microscopy. In this white paper, we present the detector principle and review the status of the experimental techniques required for directional readout of nuclear recoil tracks. Specifically, we focus on diamond as a target material; it is both a leading platform for emerging quantum technologies and a promising component of next-generation semiconductor electronics. Based on the development and demonstration of directional readout in diamond over the next decade, a future WIMP detector will leverage or motivate advances in multiple disciplines towards precision dark matter and neutrino physics.

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Section: Wimp Detection Below Neutrino Floor 21 Neutrino Floormentioning

confidence: 99%

Section: Wimp Detection Below Neutrino Floor 21 Neutrino Floormentioning

confidence: 99%

Directional Detection of Dark Matter Using Solid-State Quantum Sensing

Ebadi¹,

Marshall²,

Phillips³

et al. 2022

Preprint

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“…These two effects together may render the ionization yield dependent on the direction of the recoiling ion and thus the initial DM's direction of motion. There has been some modeling of these effects [43], suggesting they may yield tens of % modulation, and more sophisticated modeling of the underlying condensed-matter physics is the next step.…”

Section: Addressing Ionization Leakage With New Materialsmentioning

confidence: 99%

A Strategy for Low-Mass Dark Matter Searches with Cryogenic Detectors in the SuperCDMS SNOLAB Facility

Collaboration¹,

Albakry²,

Alkhatib³

et al. 2022

Preprint

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The SuperCDMS Collaboration is currently building SuperCDMS SNOLAB, a dark matter search focused on nucleon-coupled dark matter in the 1-5 GeV mass range. Looking to the future, the Collaboration has developed a set of experience-based upgrade scenarios, as well as novel directions, to extend the search for dark matter using the SuperCDMS technology in the SNOLAB facility. The experienced-based scenarios are forecasted to probe many square decades of unexplored dark matter parameter space below 5 GeV, covering over 6 decades in mass: 1-100 eV for dark photons and axion-like particles, 1-100 MeV for dark-photoncoupled light dark matter, and 0.05-5 GeV for nucleon-coupled dark matter. They will reach the neutrino fog in the 0.5-5 GeV mass range and test a variety of benchmark models and sharp targets. The novel directions involve greater departures from current SuperCDMS technology but promise even greater reach in the long run, and their development must begin now for them to be available in a timely fashion.The experienced-based upgrade scenarios rely mainly on dramatic improvements in detector performance based on demonstrated scaling laws and reasonable extrapolations of current performance. Importantly, these improvements in detector performance obviate significant reductions in background levels beyond current expectations for the SuperCDMS SNOLAB experiment. Given that the dominant limiting backgrounds for SuperCDMS SNOLAB are cosmogenically created radioisotopes in the detectors, likely amenable only to isotopic purification and an underground detector life-cycle from before crystal growth to detector testing, the potential cost and time savings are enormous and the necessary improvements much easier to prototype.This executive summary outlines the detector upgrades, the new dark matter search modes they enable, the resulting expected science reach, and the novel directions under consideration. In the full document that follows, Section 1 reviews the SuperCDMS SNOLAB experiment under construction, including updated sensitivity expectations, along with a high-level overview of future opportunities, both experienced-based upgrades and novel directions. Section 2 provides detailed sensitivity forecasts for the experience-based upgrades. Section 3 presents specific activities being undertaken now to explore the delineated novel directions.

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“…The fogginess of the neutrino floor has become somewhat better-appreciated recently [51,62,71]. However it is something that is rarely visualised: usually just a single neutrino floor limit is plotted.…”

Section: Xenon Xenonmentioning

confidence: 99%

“…Since 2013 some form of neutrino floor has been shown underneath all experimental results, often billed as an ultimate sensitivity limit [59]. Methods of circumventing the neutrino floor have been proposed [60][61][62]. However, only directional detection seems to be a realistic strategy for doing so with comparatively low statistics [63][64][65][66][67][68][69][70].…”

mentioning

confidence: 99%

Fog on the horizon: a new definition of the neutrino floor for direct dark matter searches

O'Hare

2021

Preprint

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Solar neutrinos and dark matter detection with diurnal modulation

Cited by 17 publications

References 23 publications

Directional Detection of Dark Matter Using Solid-State Quantum Sensing

Directional Detection of Dark Matter Using Solid-State Quantum Sensing

A Strategy for Low-Mass Dark Matter Searches with Cryogenic Detectors in the SuperCDMS SNOLAB Facility

Fog on the horizon: a new definition of the neutrino floor for direct dark matter searches

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