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Even Lighter Particle Dark Matter
by Alvaro E. Chavarria
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Submission summary
| Authors (as registered SciPost users): | Alvaro Chavarria |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2210.05661v1 (pdf) |
| Date submitted: | 2022-10-12 06:42 |
| Submitted by: | Chavarria, Alvaro |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 14th International Conference on Identification of Dark Matter (IDM2022) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
We report on recent progress in the search for dark matter particles with masses from 1 MeV to 1 GeV. Several dark matter candidates in this mass range are expected to generate measurable electronic-recoil signals in direct-detection experiments. We focus on dark matter particles scattering with electrons in semiconductor detectors since they have fundamentally the highest sensitivity due to their low ionization threshold. Charge-coupled device (CCD) silicon detectors are the leading technology, with significant progress expected in the coming years. We present the status of the CCD program and briefly report on other efforts.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-11-17 (Invited Report)
- Cite as: Anonymous, Report on arXiv:2210.05661v1, delivered 2022-11-17, doi: 10.21468/SciPost.Report.6147
Strengths
The proceedings summarize nicely the CCD-based efforts to directly detect Dark Matter in the MeV-GeV mass bracket with a particular focus on the DAMIC experiment.
Report
A small inaccuracy is to lump together Migdal effect and Bremsstrahlung in the introduction and to claim they are both down by a level of 10^-6 compared to DM-nuclear scattering. First, Migdal might be more frequent as stated and, second, there is also a hierarchy between both mentioned processes. The statement could hence be sharpened.
Other than that, the proceedings are fine to be published.
Author: Alvaro Chavarria on 2022-12-30 [id 3195]
(in reply to Report 1 on 2022-11-17)I thank the reviewer for their comments. Indeed, the Migdal probability is higher than previously stated.
I updated Section 2 with separate sentences about the Migdal effect and the Bremsstrahlung process.