An introduction to axions and their detection

Irastorza, I.G.

doi:10.21468/scipostphyslectnotes.45

Cited by 23 publications

(16 citation statements)

References 231 publications

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“…This conversion phenomenon is the basis for the majority of the experimental and observational ALP searches (see, e.g., Ref. [8][9][10][11] for recent reviews). Conversions of very-high-energy (VHE) cosmic photons into ultra-light ALPs (with m a 10 −7 eV) in cosmic magnetic fields of Galactic or extragalactic origin have been proposed as an intriguing possibility to perform ALP searches with gamma-ray telescopes (see, e.g., Refs.…”

Section: Introductionmentioning

confidence: 99%

Constraining axion-like particles with the diffuse gamma-ray flux measured by the Large High Altitude Air Shower Observatory

Mastrototaro,

Carenza,

Chianese

et al. 2022

Preprint

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The detection of very high-energy neutrinos by IceCube experiment supports the existence of a comparable gamma-ray counterpart from the same cosmic accelerators. Under the likely assumption that the sources of these particles are of extragalactic origin, the emitted photon flux would be significantly absorbed during its propagation over cosmic distances. However, in the presence of photon mixing with ultra-light axion-like-particles (ALPs), this expectation would be strongly modified. Notably, photon-ALP conversions in the host galaxy would produce an ALP flux which propagates unimpeded in the extragalactic space. Then, the back-conversion of ALPs in the Galactic magnetic field leads to a diffuse high-energy photon flux. In this context, the recent detection of the diffuse high-energy photon flux by the Large High Altitude Air Shower Observatory (LHAASO) allows us to exclude at the 95% CL an ALP-photon coupling gaγ 3.9 − 7.8 × 10 −11 GeV −1 for ma 4×10 −7 eV, depending on the assumptions on the magnetic fields and on the original gammaray spectrum. This new bound is complementary with other ALP constraints from very-high-energy gamma-ray experiments and sensitivities of future experiments.

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Section: Introductionmentioning

confidence: 99%

Constraining axion-like particles with the diffuse gamma-ray flux measured by the Large High Altitude Air Shower Observatory

Mastrototaro,

Carenza,

Chianese

et al. 2022

Preprint

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“…The experimental search for axions and ALPs has enjoyed a fantastic revival in the last few years (see Refs. [13,14,15] for recent reviews). In particular, new experimental techniques promise the exploration of large, currently unconstrained portions of the ALP parameter space.…”

Section: Introductionmentioning

confidence: 99%

Aspects of Axions and ALPs Phenomenology

Giannotti¹

2022

Preprint

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The physics of axions and axion-like particles (ALPs) is enjoying an incredibly productive period, with many new experimental proposals, theoretical idea, and original astrophysical and cosmological arguments which help the search effort. The large number of experimental proposals is likely to lead to fundamental advances (perhaps, a discovery?) in the coming years. The aim of this article is to provide a very brief overview of some of the recent developments in axions and ALP phenomenology, and to discuss some relevant aspects in this important field. A particular attention is given to the definition of motivated regions in the axion parameters space, which should be the targets of experimental searches.1 We ignore interactions with fermions other than e, p and n, as they are less relevant for axion searches. We also neglect possible CP-odd couplings [2].

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“…Axions are very small and very light bosonic particles that can be described as a classical field, similar to how photons can be described via an electromagnetic field. Axions have a few properties that make it a strong dark matter candidate (Garcia Irastorza, 2022).…”

Section: Introductionmentioning

confidence: 99%

Axions as a model of Dark Matter

Pefianco

2022

J Stud Res

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The true nature of dark matter is an extremely important and fundamental problem in the study of astrophysics, particle physics, cosmology and many other areas within the study of physics. This paper presents experimental evidence for the existence of dark matter through discussing the experimental results of mass profiling a galaxy and gravitational lensing. The fundamental properties of dark matter are then discussed, and evidence for these properties is presented. This allows further discussion of one of the most promising models of dark matter - the axion. The purpose of this paper is to present the evidence for the axion model, describe the nature of the theoretical axion particle, and to highlight the effects this model would have on other theories in physics such as solving the Strong CP Problem in the theory of quantum chromodynamics.

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An introduction to axions and their detection

Cited by 23 publications

References 231 publications

Constraining axion-like particles with the diffuse gamma-ray flux measured by the Large High Altitude Air Shower Observatory

Constraining axion-like particles with the diffuse gamma-ray flux measured by the Large High Altitude Air Shower Observatory

Aspects of Axions and ALPs Phenomenology

Axions as a model of Dark Matter

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