The search for particle-like dark matter with meV-to-GeV masses has developed rapidly in the past few years. We summarize the science case for these searches, the recent progress, and the exciting upcoming opportunities. Funding for Research and Development and a portfolio of small dark matter projects will allow the community to capitalize on the substantial recent advances in theory and experiment and probe vast regions of unexplored dark-matter parameter space in the coming decade.

Snowmass2021 Cosmic Frontier: The landscape of low-threshold dark matter direct detection in the next decade

This paper summarizes the modeling, statistics, simulation, and computing needs of direct dark matter detection experiments in the next decade

Snowmass2021 Cosmic Frontier: Modeling, statistics, simulations, and computing needs for direct dark matter detection

D. Acosta, A. A. Affolder, A. Apresyan, M. Artuso, V. Bhopatkar, S. Butalla, G. A. Carini, T. Cecil, A. Connolly, C. E. Dahl, A. Deiana, K. Dunne, C. O. Escobar, J. Estrada, F. Fahim, J. E. Fast, M. Garcia-Sciveres, R. Guenette, M. T. Hedges, K. Irwin, A. Karle, W. Ketchum, S. Kravitz, W. H. Lippincott, R. H. Maruyama, J. McIver, M. Newcomer, J. Parsons, M. Pyle, J. L. Raaf, C. Rogan, M. Sanchez, I. Shipsey, B. Surrow, M. Titov, S. E. Vahsen, C. Vernieri, A. P. White, S. Worm, M. Yeh, R. Yohay, J. Zettlemoyer

Report of the Instrumentation Frontier Working Group for Snowmass 2021

Topical Group Conveners: Darin Acosta, Anthony A. Affolder, Artur Apresyan, Gabriella A. Carini, Thomas Cecil, Amy Connolly, C. Eric Dahl, Allison Deiana, Carlos O. Escobar, Juan Estrada, James E. Fast, Maurice Garcia-Sciveres, Roxanne Guenette, Kent Irwin, Albrecht Karle, Wesley Ketchum, Reina H. Maruyama, F. Mitchell Newcomer, John Parsons, Matthew Pyle, Jennifer L. Raaf, Chris Rogan, Ian Shipsey, Bernd Surrow, Maxim Titov, Sven E. Vahsen, Andrew P. White, Steven Worm, Minfang Yeh, Rachel Yohay

N ov 2 02 2 1 Report of the Instrumentation Frontier Working Group for Snowmass 2021 Frontier Conveners :

The nature of dark matter is a problem with too many potential solutions. We investigate whether a consistent embedding into quantum gravity can decimate the number of solutions to the dark-matter problem. Concretely, we focus on a hidden sector composed of a gauge field and a charged scalar, with gauge group U(1)$_{\textmd{D}}$ or SU(2)$_\textmd{D}$. The gauge field is the dark-matter candidate, if the gauge symmetry is broken spontaneously. Phenomenological constraints on the couplings in this model arise from requiring that the correct dark matter relic density is produced via thermal freeze-out and that recent bounds from direct-detection experiments are respected. We find that the consistent embedding into asymptotically safe quantum gravity gives rise to additional constraints on the couplings at the Planck scale, from which we calculate corresponding constraints at low energy scales. We discover that phenomenological constraints cannot be satisfied simultaneously with theoretical constraints from asymptotically safe quantum gravity, ruling out these dark-matter models.

pdf/ruling-out-models-of-vector-dark-matter-in-asymptotically-5490bqmmgn.pdf

Ruling out models of vector dark matter in asymptotically safe quantum gravity

Future dark matter direct detection experiments will reach unprecedented levels of sensitivity. Achieving this sensitivity will require more precise models of signal and background rates. Improving the precision of signal and background modeling goes hand-in-hand with novel calibration techniques that can probe rare processes and lower threshold detector response. The goal of this white paper is to outline community needs to meet the background and calibration requirements of next-generation dark matter direct detection experiments.

Snowmass2021 Cosmic Frontier White Paper: Calibrations and backgrounds for dark matter direct detection

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Snowmass2021 Cosmic Frontier White Paper: Calibrations and backgrounds for dark matter direct detection