Constraining ALPs with Cosmic Microwave Background Polarization Birefringence

General Meeting and Training School of the COST Action COSMIC WISPers (COSMICWISPers) 2026 Open access

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Authors: Matteo Galaverni
DOI: 10.22323/1.507.0016
Cited by: 0

Abstract

Cosmic birefringence - the frequency-independent rotation of the linear polarization plane - offers a powerful probe of photon interactions with axion-like particles (ALPs). Its accurate characterization requires resolving two opposite conventions for the linear polarization angle. Here we summarize the latest data on the isotropic effect from cosmic microwave background (CMB) observations.

Fields of Study & Subjects

Dark Matter and Cosmic Phenomena Cosmology and Gravitation Theories Astrophysics and Cosmic Phenomena

Publication details

Journal / source
General Meeting and Training School of the COST Action COSMIC WISPers (COSMICWISPers)
Pages
016–016
Publication date
10 February 2026
Language
EN