5 sigma tension between Planck cosmic microwave background and eBOSS Lyman-alpha forest and constraints on physics beyond Lambda CDM
File(s)
Published version
Author(s)
Rogers, Keir
Poulin, Vivian
Type
Journal Article
Abstract
We find that combined Planck cosmic microwave background, baryon acoustic oscillations, and supernovae data analyzed under Λ cold dark matter (ΛCDM) are in 4.9𝜎 tension with the extended Baryon Oscillation Spectroscopic Survey (eBOSS) Ly𝛼 forest in inference of the linear matter power spectrum at wave number ∼1ℎMpc−1 and redshift = 3. Model extensions can alleviate this tension: running in the tilt of the primordial power spectrum (𝛼s∼−0.01); a fraction ∼(1−5)% of ultralight axion dark matter (DM) with particle mass ∼10−25 eV or warm DM with mass ∼10 eV. The new Dark Energy Spectroscopic Instrument survey, coupled with high-accuracy modeling, will help distinguish the source of this discrepancy.
Date Issued
2025-01-01
Date Acceptance
2025-01-14
Citation
Physical Review Research, 2025, 7 (1)
ISSN
2643-1564
Publisher
American Physical Society
Journal / Book Title
Physical Review Research
Volume
7
Issue
1
Copyright Statement
© 2025 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI
License URL
Sponsor
Science and Technology Facilities Council
Identifier
10.1103/PhysRevResearch.7.L012018
Grant Number
ST/Z510191/1
Publication Status
Published
Article Number
ARTN L012018
Date Publish Online
2025-01-22