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Anisotropic ionization threshold and directional sensitivity in solid state DM detectors

by Matti Heikinheimo, Sebastian Sassi, Kimmo Tuominen, Kai Nordlund, Nader Mirabolfathi

Submission summary

Authors (as Contributors): Matti Heikinheimo
Submission information
Preprint link: scipost_202209_00045v1
Date submitted: 2022-09-22 15:05
Submitted by: Heikinheimo, Matti
Submitted to: SciPost Physics Proceedings
Proceedings issue: 14th International Conference on Identification of Dark Matter
Ontological classification
Academic field: Physics
Specialties:
  • Gravitation, Cosmology and Astroparticle Physics

Abstract

The threshold displacement energy for nuclear recoils depends strongly on the direction of the recoiling nucleus with respect to the crystal lattice. Assuming that similar dependence holds for the ionization threshold for low energy nuclear recoils, we explore the consequences of the resulting directional dependence of the observable event rate in ionization detectors. For low mass dark matter, this effect leads to a daily modulation in the event rate. We discuss how this effect can be utilized to separate the DM signal from the solar neutrino background and how the structure of the modulation signal can be used to identify the type of the DM-nucleon coupling.

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Submission & Refereeing History

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Submission scipost_202209_00045v1 on 22 September 2022

Reports on this Submission

Anonymous Report 1 on 2022-11-6 (Invited Report)

Report

In this proceeding authors looking into effect of daily modulation caused by directional dependence of the observable event rate in ionization detectors assuming directional for ionization threshold. Very interesting work. I am very much looking forward to results with other target materials. The manuscript is clearly written and well organised. I recommend the manuscript for publication as it is.

Some typos like "refrence" can fixed during issue preparation.

  • validity: high
  • significance: high
  • originality: high
  • clarity: high
  • formatting: excellent
  • grammar: -

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