New experimental approaches in the search for axion-like particles

By Igor G. Irastorza, J. Redondo. Progress in Particle and Nuclear Physics, 2018

817 citations recorded by the source corpus.

Axions and other very light axion-like particles appear in many extensions of the Standard Model, and are leading candidates to compose part or all of the missing matter of the Universe. They also appear in models of inflation, dark radiation, or even dark energy, and could solve some long-standing astrophysical anomalies. The physics case of these particles has been considerably developed in recent years, and there are now useful guidelines and powerful motivations to attempt experimental detection. Admittedly, the lack of positive signal of new physics at the high energy frontier, and in underground detectors searching for weakly interacting massive particles, is also contributing to the increase of the interest in axion searches. The experimental landscape is rapidly evolving, with many novel detection concepts and new experiments being proposed lately. An updated account of those initiatives is lacking in the literature. In this review we attempt to provide such a review. We will focus on the new experimental approaches and their complementarity, but will also review the most relevant recent results from the consolidated strategies and the prospects of new generation experiments under consideration in the field. We will also briefly review the latest developments of the theory, cosmology and astrophysics of axions and we will discuss the prospects to probe a large fraction of relevant parameter space in the coming decade.

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Citations in the corpus

Improved axion emissivity from a supernova via nucleon-nucleon bremsstrahlung (2019, background): “Therefore, the PQ scale controls the axion phenomenology and is constrained by different experiments and astrophysical arguments that involve interactions with photons, electrons, and hadrons (see [7–9] for recent reviews).”
Physics beyond colliders at CERN: beyond the Standard Model working group report (2019, background): “The gray shaded area outlines the currently excluded regions for a class of models corresponding to the benchmarks BC9 and BC11 (see [27, 38, 39]).”
The landscape of QCD axion models (2020, background): “Below 100 eV the emission rate is less clear and unaccounted processes may contribute [38].”
Physics potential of the International Axion Observatory (IAXO) (2019, background): “The detection of these particles in terrestrial experiments is currently pursued by a number of experimental techniques, see [4, 5] for recent reviews.”
Early seeds of axion miniclusters (2018, background): “Moreover, despite the minute values of the axion DM field today, there are experimental ideas galore to detect axions as DM, see [17] for a recent review.”
Astrophysical Limits on Very Light Axion-like Particles from Chandra Grating Spectroscopy of NGC 1275 (2019, background): “Especially interesting, and the focus of this paper, are axion-like particles (Graham et al. 2015; Irastorza & Redondo 2018).”
Recent Progress in the Physics of Axions and Axion-Like Particles (2020, background): “New ideas for axion search in laboratory experiments have been proposed [21–23] which can probe a wide range of axion mass and couplings that were not accessible before.”
The PVLAS experiment: A 25 year effort to measure vacuum magnetic birefringence (2020, background): “A comprehensive review of the experimental efforts to search for ALPs and axion can be found in [69, 70].”