Results 11 to 20 of about 292,949 (385)
Axion quasiparticles for axion dark matter detection [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 It has been suggested that certain antiferromagnetic topological insulators contain axion quasiparticles (AQs), and that such materials could be used to detect axion dark matter (DM). The AQ is a longitudinal antiferromagnetic spin fluctuation coupled to
J. Schütte-Engel +9 more
semanticscholar +8 more sources
Physics Reports, 2015 1. Introduction 2. Models: the QCD axion; the strong CP problem; PQWW, KSVZ, DFSZ; anomalies, instantons and the potential; couplings; axions in string theory 3. Production and I.C.'s: SSB and non-perturbative physics; the axion field during inflation and PQ SSB; cosmological populations - decay of parent, topological defects, thermal production ...
D. Marsh
semanticscholar +6 more sources
Journal of High Energy Physics, 2018 Conventional approaches to probing axions and axion-like particles (ALPs) typically rely on a coupling to photons. However, if this coupling is extremely weak, ALPs become invisible and are effectively decoupled from the Standard Model. Here we show that
Machado, Camila S. +3 more
core +3 more sources
An even lighter QCD axion [PDF]
Journal of High Energy Physics, 2021 We explore whether the axion which solves the strong CP problem can naturally be much lighter than the canonical QCD axion. The Z N $$ {Z}_{\mathcal{N}} $$ symmetry proposed by Hook, with N $$ \mathcal{N} $$ mirror and degenerate worlds coexisting in ...
Luca Di Luzio +3 more
doaj +2 more sources
Cosmology of axion dark matter [PDF]
Proceedings of 1st General Meeting and 1st Training School of the COST Action COSMIC WSIPers — PoS(COSMICWISPers)I present an introduction and topical review on axions as a dark matter candidate. Emphasis is placed on issues surrounding the cosmology of axion dark matter that are relevant for present-day searches, including: early-Universe production mechanisms ...
Ciaran A. J. O’Hare
openalex +3 more sources
Advancing globular cluster constraints on the axion-photon coupling [PDF]
Journal of Cosmology and Astroparticle Physics, 2022 We improve the current upper bound on the axion-photon coupling derived from stellar evolution using the R 2 parameter, the ratio of stellar populations on the Asymptotic Giant Branch to Horizontal Branch in Globular Clusters.
M. Dolan +2 more
semanticscholar +1 more source
Dark matter from axion strings with adaptive mesh refinement [PDF]
Nature Communications, 2021 Axions are hypothetical particles that may explain the observed dark matter density and the non-observation of a neutron electric dipole moment. An increasing number of axion laboratory searches are underway worldwide, but these efforts are made ...
M. Buschmann +6 more
semanticscholar +1 more source
Search for Invisible Axion Dark Matter in the 3.3-4.2 μeV Mass Range. [PDF]
Physical Review Letters, 2021 We report the results from a haloscope search for axion dark matter in the 3.3-4.2 μeV mass range. This search excludes the axion-photon coupling predicted by one of the benchmark models of "invisible" axion dark matter, the Kim-Shifman-Vainshtein ...
C. Bartram +50 more
semanticscholar +1 more source
Axion dark matter: What is it and why now? [PDF]
Science Advances, 2021 The axion has emerged in recent years as a leading particle candidate to provide the mysterious dark matter in the cosmos, as we review here for a general scientific audience.
Francesca Chadha-Day, J. Ellis, D. Marsh
semanticscholar +1 more source
Upper limit on the axion-photon coupling from magnetic white dwarf polarization [PDF]
Physical Review D, 2022 Polarization measurements of thermal radiation from magnetic white dwarf (MWD) stars have been proposed as a probe of axion-photon mixing. The radiation leaving the surface of the MWD is unpolarized, but if low-mass axions exist then photons polarized ...
Christopher Dessert, D. Dunsky, B. Safdi
semanticscholar +1 more source