ALETHEIA: hunting for low-mass dark matter with liquid helium TPCs

Liao, J.; Gao, Y.; Liang, Zhuo; Ouyang, Zebang; Peng, Zhaohua; Zhang, Lei; Zhang, Lifeng; Zheng, Jian; Zhou, Jiang-Feng

doi:10.1140/epjp/s13360-023-03747-2

Cited by 6 publications

(2 citation statements)

References 90 publications

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“…Regarding other phenomenological aspects, we have checked that the present dark QCD model can survive current constraints, such as the measurement of the ordinary QCD hadron physics, dark meson couplings to diphoton, and limits on the dark baryon as dark matter candidates, and so forth. Furthermore, the dark meson and dark baryon yield several smoking guns to be probed in the near future, respectively, through the triphoton (3γ) signal at the mass around 1 GeV, at the Belle II experiment with 20-50 fb −1 data [31], and a planned dark matter detection experiment aiming at the sub-GeV mass range [32] with the spin-independent dark matter-nucleon cross-section ∼10 −43 cm 28 .…”

Section: A Solution: New Quarks With Dark Qcd Colorsmentioning

confidence: 99%

New Indication from Quantum Chromodynamics Calling for beyond the Standard Model

Cui,

Li,

Ishida

et al. 2024

Universe

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We find that a big gap between indicators for the breaking strengths of the global chiral SU(2) and U(1) axial symmetries in the QCD of the standard model (SM) can be interpreted as a new fine-tuning problem. This may thus imply calling for a class beyond the SM, which turns out to favor having a new chiral symmetry, and the associated massless new quark is insensitive to the chiral SU(2) symmetry for the lightest up and down quarks so that the fine-tuning is relaxed. Our statistical estimate shows that QCD of the SM is by more than 300 standard deviations off the parameter space free from fine-tuning, and the significance will be greater as the lattice measurements on the QCD hadron observables become more accurate. We briefly address a dark QCD model with massless new quarks as one viable candidate.

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Section: A Solution: New Quarks With Dark Qcd Colorsmentioning

confidence: 99%

New Indication from Quantum Chromodynamics Calling for beyond the Standard Model

Cui,

Li,

Ishida

et al. 2024

Universe

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“…Furthermore, combining the LHe's unique advantages on backgrounds control, we expect that a ton-scale LHe TPC could reach extremely low backgrounds, therefore, fully touch down the 8 B neutrino floor (∼ 10 −45 cm 2 ) or even below. For more details, please refer to our submitted paper [10].…”

mentioning

confidence: 99%

Coating μm TPB on a cylindrical detector and studying the sample films being cooled to LN and LHe temperatures

et al. 2022

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ALETHEIA is a newly established dark matter direct detection project that aims at hunting for low-mass WIMPs. TPB is widely implemented in liquid helium and argon experiments to shift VUV photons to visible light. We first report that we have successfully coated ∼ 3 μm TPB on the inner walls of a 10-cm cylindrical PTFE detector; we split the coating process into two steps to have all of the surfaces being coated with the same thickness; three independent methods were applied to figure out the thickness of the TPB coating layers, and consistent results were obtained. Second, with an SEM machine, we scanned the surface of TPB coating sample films exposed to different cryogenic temperatures. The first group of sample layers were immersed into a liquid nitrogen dewar for forty hours, the second group samples were cooled to 4.5 K for three hours, and the third group stayed at room temperature after coating. The SEM-scanned images of the sample films barely show any noticeable difference.

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Proposed Peking University muon experiment for muon tomography and dark matter search

Yu,

Wang,

Liu

et al. 2024

Phys. Rev. D

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A set of new methods are proposed here to directly detect light mass dark matter through its scattering with abundant atmospheric muons or accelerator beams. A first plan is to use the free cosmic-ray muons interacting with dark matter in a volume surrounded by tracking detectors, to trace the possible interaction between dark matter and muons. Secondly, the same device can be interfaced with domestic or international muon beams. Due to the much larger muon intensity and focused beam, it is anticipated that the detector can be made further compact, and the resulting sensitivity on dark matter searches will be improved. Furthermore, it may also be possible to measure precisely directional distributions of cosmic-ray muons, either at mountain or sea level, and the differences may reveal possible information about dark matter distributed near the Earth. Specifically, methods described here can have advantages over “exotic” dark matters that are either muonphilic or slowed down due to some mechanism, and the sensitivity on dark matter and muon scattering cross section can reach as low as microbarn level. Published by the American Physical Society 2024

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ALETHEIA: hunting for low-mass dark matter with liquid helium TPCs

Cited by 6 publications

References 90 publications

New Indication from Quantum Chromodynamics Calling for beyond the Standard Model

New Indication from Quantum Chromodynamics Calling for beyond the Standard Model

Coating μm TPB on a cylindrical detector and studying the sample films being cooled to LN and LHe temperatures

Proposed Peking University muon experiment for muon tomography and dark matter search

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