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Observational constraints on dark matter models, by Eric Armengaud

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Eric Armengaud’s lecture notes outline observational methods to test dark matter (DM) models, focusing on experimental constraints for both generic and specific DM scenarios. The analysis prioritizes WIMPs (Weakly Interacting Massive Particles), the most studied DM candidate, reviewing current detection efforts and their limitations. It examines DM models altering the cosmological matter power spectrum at high wave numbers (k), using Lyman-α forest data to derive stringent bounds. The Lyman-α forest—a pattern of hydrogen absorption in quasar spectra—serves as a key probe for small-scale DM structure, constraining warm or fuzzy DM models. Published in March 2026, the work stems from the Les Houches Summer School’s Dark Universe series, supported by France’s CEA Saclay and ANR.
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SciPost Physics Lecture Notes Home Authoring Refereeing Submit a manuscript About Observational constraints on dark matter models Eric Armengaud SciPost Phys. Lect. Notes 119 (2026) · published 17 March 2026 Part of the 2025-07: The Dark Universe Collection in the Les Houches Summer School Lecture Notes Series. doi: 10.21468/SciPostPhysLectNotes.119 pdf BiBTeX RIS Submissions/Reports Abstract In this short course, which complements the lecture on Dark Matter alternatives, I provide concrete examples of how Dark Matter (DM) models can be tested, whether for generic DM properties, or specific scenarios. First, I review searches for WIMPs, one of the most well-studied DM candidates. I also showcase some constraints on DM models that predict a modification of the cosmological matter power spectrum at high $k$. To this end, I focus primarily on bounds derived from the Lyman-$\alpha$ forest observations, which I will present in a brief overview beforehand. × TY - JOURPB - SciPost FoundationDO - 10.21468/SciPostPhysLectNotes.119TI - Observational constraints on dark matter modelsPY - 2026/03/17UR - https://scipost.org/SciPostPhysLectNotes.119JF - SciPost Physics Lecture NotesJA - SciPost Phys. Lect. NotesSP - 119A1 - Armengaud, EricAB - In this short course, which complements the lecture on Dark Matter alternatives, I provide concrete examples of how Dark Matter (DM) models can be tested, whether for generic DM properties, or specific scenarios. First, I review searches for WIMPs, one of the most well-studied DM candidates. I also showcase some constraints on DM models that predict a modification of the cosmological matter power spectrum at high $k$. To this end, I focus primarily on bounds derived from the Lyman-$\alpha$ forest observations, which I will present in a brief overview beforehand.ER - × @Article{10.21468/SciPostPhysLectNotes.119, title={{Observational constraints on dark matter models}}, author={Eric Armengaud}, journal={SciPost Phys. Lect. Notes}, pages={119}, year={2026}, publisher={SciPost}, doi={10.21468/SciPostPhysLectNotes.119}, url={https://scipost.org/10.21468/SciPostPhysLectNotes.119},} Ontology / Topics See full Ontology or Topics database. Dark matter Author / Affiliations: mappings to Contributors and Organizations See all Organizations. 1 2 3 Eric Armengaud 1 Commissariat à l'énergie atomique / CEA Saclay [CEA Saclay] 2 Université Paris-Saclay / University of Paris-Saclay 3 Institut de Recherche sur les Lois Fondamentales de l'Univers / Institut de Recherche sur les Lois Fondamentales de l'Univers [IRFU] Funder for the research work leading to this publication Agence Nationale de la Recherche [ANR]

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