Cosmological bounds on pseudo Nambu-Goldstone bosons

By Davide Cadamuro, J. Redondo. 2011

289 citations recorded by the source corpus.

We review the cosmological implications of a relic population of pseudo Nambu-Goldstone bosons (pNGB) with an anomalous coupling to two photons, often called axion-like particles (ALPs). We establish constraints on the pNGB mass and two-photon coupling by considering big bang nucleosynthesis, the physics of the cosmic microwave background, and the diffuse photon background. The bounds from WMAP7 and other large-scale-structure data on the effective number of neutrino species can be stronger than the traditional bounds from the primordial helium abundance. These bounds, together with those from primordial deuterium abundance, constitute the most stringent probes of early decays.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/0bcf577ad3e5fe39955c62293cb12f07cefae0aa

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Citations in the corpus

Muonic Boson Limits: Supernova Redux (2021, unknown): “For very small couplings, other interesting cosmological bounds come from BBN and CMB spectral distortions [18, 96].”
Sensitivity projections for dark matter searches with the Fermi large area telescope (2016, background): “ALPs in this mass range, on the other hand, could constitute all of the DM, if additional degrees of freedom above the electro-weak scale at high energies are assumed [252].”
Advancing globular cluster constraints on the axion-photon coupling (2022, background): “This includes constraints from the CERN Axion Solar Telescope (CAST) [10], dark matter haloscopes [11–35], and a variety of analyses from astrophysics [36–49] and cosmology [50].”
Revised constraints and Belle II sensitivity for visible and invisible axion-like particles (2017, background): “[10] and bounds from visible decays of ALPs produced in SN 1987A from ref [49].”
Factoring the strong CP problem (2017, background): “onstraints The yellow region is ruled out by a combination of cosmological constraints, assuming that the reheat temperature was suciently high to produce an equilibrium thermal population of axions [55] which dominates over misalignment production in this region [56]. Future CMB observations can al”