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Axions are hypothetical particles, proposed to account for the invariance of CP symmetry in quantum chromodynamics. While axions and axion-like-particles are well-motivated by string theory and beyond-Standard-Model extensions, they have…

Axion-photon conversion is a prime mechanism to detect axion-like particles that share a coupling to the photon. We point out that in the vicinity of neutron stars with strong magnetic fields, magnetars, the effective photon mass receives…

High Energy Physics - Phenomenology · Physics 2023-10-10 Kyrylo Bondarenko , Alexey Boyarsky , Josef Pradler , Anastasia Sokolenko

A search for solar axions and axion-like particles produced in the $p+d\rightarrow\rm{^3He}+A~(5.5\rm{ ~MeV})$ reaction was performed using the complete dataset of the Borexino detector (3995 days of measurement live-time). The following…

High Energy Physics - Experiment · Physics 2025-10-23 Borexino Collaboration

Recently, it was noted that absorptive corrections to the electromagnetic form factor in high-energy proton-proton scattering are important for the theoretical interpretation of the $p^\uparrow{p}$ and $p^\uparrow{A}$ analyzing power…

High Energy Physics - Phenomenology · Physics 2024-09-18 Andrei Poblaguev

The purpose of this paper is to assess the feasibility of axion detection by X-ray spectroscopy of the sun. We review the theory of axion-photon mode conversion with special attention to axions emitted in the 14.4 keV M1 decay of 57Fe at…

Solar and Stellar Astrophysics · Physics 2015-06-15 J. Martin Laming

The origin of various celestial phenomena have remained mysterious for conventional astrophysics. Therefore, alternative solutions should be considered, taking into account the involvement of unstable dark-matter particle candidates, such…

Astrophysics · Physics 2007-05-23 K. Zioutas , Y. Semertzidis , Th. Papaevangelou

The CERN Axion Solar Telescope (CAST) searches for solar axions employing a 9 Tesla superconducting dipole magnet equipped with 3 independent detection systems for X-rays from axion-photon conversions inside the 10 m long magnetic field.…

Astrophysics · Physics 2007-05-23 R. Kotthaus , H. Braeuninger , P. Friedrich , R. Hartmann , D. Kang , M. Kuster , G. Lutz , L. Strueder

Axion dark matter differentiates the phase velocities of the circular-polarized photons. In this Letter, a scheme to measure the phase difference by using a linear optical cavity is proposed. If the scheme is applied to the Fabry-P\'erot…

High Energy Physics - Phenomenology · Physics 2019-11-01 Koji Nagano , Tomohiro Fujita , Yuta Michimura , Ippei Obata

Axion helioscopes search for solar axions and axion-like particles via inverse Primakoff conversion in strong laboratory magnets pointed at the Sun. Anticipating the detection of solar axions, we determine the potential for the planned…

Cosmology and Nongalactic Astrophysics · Physics 2020-08-28 Ciaran A. J. O'Hare , Andrea Caputo , Alexander J. Millar , Edoardo Vitagliano

A search for axioelectric absorption of solar axions produced in the $ p + d \rightarrow {^3\rm{He}}+\gamma~(5.5~ \rm{MeV})$ reactions has been performed with a BGO detector placed in a low-background setup. A model-independent limit on an…

The Primakoff process plays a crucial role in axion production in astrophysical environments and laboratories. Given the rising interest in axion physics and many on-going experimental activities, we conduct a comprehensive calculation of…

High Energy Physics - Phenomenology · Physics 2024-08-07 Quan-feng Wu , Xun-Jie Xu

Axions and axion-like particles (ALPs) are some of the best-motivated dark matter (DM) candidates. Under certain circumstances, large axion fluctuations in the early universe can collapse to form dense configurations called axion clumps.…

Cosmology and Nongalactic Astrophysics · Physics 2021-05-21 Anirudh Prabhu

The CAST (CERN Axion Solar Telescope) experiment is searching for axions, an hypothetical particle that emerges as a possible solution to the well known CP violation problem in strong interactions. CAST is using a decommissioned LHC dipole…

Instrumentation and Methods for Astrophysics · Physics 2015-03-18 J. Galan

We propose a new method to detect observational appearance of Dark Matter axions. The method utilizes observations of neutron stars (NSs) in radio. It is based on the conversion of axions to photons in strong magnetic fields of NSs…

Astrophysics · Physics 2014-11-18 M. S. Pshirkov , S. B. Popov

We propose in this work the study of the production of axions in stellar plasma medium through an external magnetic field. In the background field approximation, we can show that the presence of the external magnetic field induces a mixing…

High Energy Physics - Phenomenology · Physics 2025-06-23 Bernard Teles de Menezes

We consider the absorption by bound electrons of dark matter in the form of dark photons and axion-like particles, as well as of dark photons from the Sun, in current and next-generation direct detection experiments. Experiments sensitive…

High Energy Physics - Phenomenology · Physics 2017-09-22 Itay M. Bloch , Rouven Essig , Kohsaku Tobioka , Tomer Volansky , Tien-Tien Yu

Axion dark matter differentiates the phase velocities of the circular-polarized photons. In Phys.Rev.Lett. 123 (2019) no.11, 111301, we have proposed a scheme to measure the phase difference by using a linear optical cavity. If the scheme…

High Energy Physics - Phenomenology · Physics 2019-12-20 Koji Nagano , Ippei Obata , Tomohiro Fujita , Yuta Michimura

Axion helioscopes search for solar axions by their conversion in x-rays in the presence of high magnetic fields. The use of low background x-ray detectors is an essential component contributing to the sensitivity of these searches. In this…

The mass of axion dark matter is only weakly bounded by cosmological observations, necessitating a variety of detection techniques over several orders of magnitude of mass ranges. Axions haloscopes based on resonant cavities have become the…

Instrumentation and Detectors · Physics 2018-10-29 Ben T. McAllister , Maxim Goryachev , Jeremy Bourhill , Eugene N. Ivanov , Michael E. Tobar

Due to the inverse Primakoff effect it has been shown that when axions interact with a DC magnetic B-field the resulting electrical action will produce an AC electromotive force which oscillates at the Compton frequency of the axion, and…

Instrumentation and Detectors · Physics 2020-06-23 Michael Edmund Tobar , Ben T. McAllister , Maxim Goryachev