Novel cosmological bounds on thermally-produced axion-like particles

@article{Caloni2022NovelCB,
  title={Novel cosmological bounds on thermally-produced axion-like particles},
  author={Luca Caloni and Martina Gerbino and Massimiliano Lattanzi and Luca Visinelli},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2022},
  volume={2022}
}
We constrain the coupling of thermally-produced axion-like particles (here axions) with photons and gluons, using data from the cosmic microwave background (CMB) spectra and baryon acoustic oscillations. The axion possesses an explicit soft breaking mass term and it is produced thermally in the early Universe from either axion-photon or axion-gluon processes, accounting for the recent progresses in the field. We derive the most stringent bounds on the axion-gluon coupling to date on the mass… 

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References

SHOWING 1-10 OF 127 REFERENCES

Constraining the axion-photon coupling with massive stars.

It is pointed out that stars in the mass window ~8-12M([circumpunct]) can serve as sensitive probes of the axion-photon interaction, g(Aγγ), and conservatively finds g( Aγγ)</~0.8×10(-10) GeV(-1), which compares favorably with the existing bounds.

Cosmological bound on the QCD axion mass, redux

We revisit the joint constraints in the mixed hot dark matter scenario in which both thermally produced QCD axions and relic neutrinos are present. Upon recomputing the cosmological axion abundance

Axion signatures from supernova explosions through the nucleon electric-dipole portal

We consider axions coupled to nucleons and photons only through the nucleon electric-dipole moment (EDM) portal. This coupling is a model-independent feature of QCD axions, which solve the strong CP

Dark energy survey year 3 results: cosmological constraints from the analysis of cosmic shear in harmonic space

We present cosmological constraints from the analysis of angular power spectra of cosmic shear maps based on data from the first three years of observations by the Dark Energy Survey (DES Y3). Our

Neutrino astronomy as a probe of physics beyond the Standard Model: decay of sub-MeV $B$-$L$ gauge boson dark matter

The U (1) B – L symmetry, the essential component in the seesaw mechanism and leptogenesis, is naturally equipped with a massive gauge boson. If this gauge boson is the dark matter, the scenario

Search for Invisible Axion Dark Matter in the 3.3-4.2  μeV Mass Range.

A haloscope search for axiondark matter in the 3.3-4.2  μeV mass range excludes the axion-photon coupling predicted by one of the benchmark models of "invisible" axion dark matter, the Kim-Shifman-Vainshtein-Zakharov model.

Combined $13\times2$-point analysis of the Cosmic Microwave Background and Large-Scale Structure: implications for the $S_8$-tension and neutrino mass constraints

We present cosmological constraints for the flat $\Lambda$CDM model, including the sum of neutrino masses, by performing a multi-probe analysis of a total of 13 tomographic auto- and cross-angular

Thermal QCD Axions across Thresholds

Abstract Thermal axion production in the early universe goes through several mass thresholds, and the resulting rate may change dramatically across them. Focusing on the KSVZ and DFSZ frameworks for

Thermal Axion Production at Low Temperatures: A Smooth Treatment of the QCD Phase Transition.

We study thermal axion production around the confinement scale. At higher temperatures, we extend current calculations to account for the masses of heavy quarks, whereas we quantify production via

Towards a precision calculation of the effective number of neutrinos 𝖭_𝖾𝖿𝖿 in the Standard Model. Part II. Neutrino decoupling in the presence of flavour oscillations and finite-temperature QED

We present in this work a new calculation of the standard-model benchmark value for the effective number of neutrinos, Neff SM, that quantifies the cosmological neutrino-to-photon energy densities.
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