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Axion-like particles (ALPs), hypothetical pseudoscalar particles that couple to photons, are among the most actively investigated candidates for new physics beyond the Standard Model. Their interaction with gamma rays in the presence of…

High Energy Astrophysical Phenomena · Physics 2026-01-15 Pooja Bhattacharjee , Christopher Eckner , Gabrijela Zaharijas , Gert Kluge , Giacomo D'Amico

We use MUSE spectroscopic observations of the dwarf spheroidal galaxy Leo T between 470 and 935 nm to search for radiative decays of axion like particles (ALPs). Under the assumption that ALPs constitute the dark matter component of the Leo…

Cosmology and Nongalactic Astrophysics · Physics 2021-01-21 Marco Regis , Marco Taoso , Daniel Vaz , Jarle Brinchmann , Sebastiaan L. Zoutendijk , Nicolas F. Bouché , Matthias Steinmetz

The signal to noise ratio efficiency $\epsilon_{\rm SNR}$ in axion dark matter searches has been estimated using large-statistic simulation data reflecting the background information and the expected axion signal power obtained from a real…

Instrumentation and Methods for Astrophysics · Physics 2023-11-23 A. K. Yi , S. Ahn , B. R. Ko , Y. K. Semertzidis

Axions are hypothetical particles that may explain the observed dark matter (DM) density and the non-observation of a neutron electric dipole moment. An increasing number of axion laboratory searches are underway worldwide, but these…

High Energy Physics - Phenomenology · Physics 2022-03-23 Malte Buschmann , Joshua W. Foster , Anson Hook , Adam Peterson , Don E. Willcox , Weiqun Zhang , Benjamin R. Safdi

Axion-like particles (ALPs) can couple to photons in strong magnetic fields, producing characteristic fluctuations in X-ray spectra. Using data from NASA's Neutron Star Interior Composition Explorer (NICER), we analyzed three pulsars: PSR…

High Energy Astrophysical Phenomena · Physics 2026-02-10 Yen-Jhen Liu , Yi Yang

We propose an experimental setup to search for Axion-like particles (ALPs) using two superconducting radio-frequency cavities. In this light-shining-through-wall setup the axion is sourced by two modes with large fields and nonzero $\vec…

High Energy Physics - Phenomenology · Physics 2022-03-09 Christina Gao , Roni Harnik

Recent advances in tabletop quantum sensor technology have enabled searches for nongravitational interactions of dark matter (DM). Traditional axion DM experiments rely on sharp resonance, resulting in extensive scanning time to cover a…

High Energy Physics - Phenomenology · Physics 2025-04-18 Kai Wei , Zitong Xu , Yuxuan He , Xiaolin Ma , Xing Heng , Xiaofei Huang , Wei Quan , Wei Ji , Jia Liu , Xiao-Ping Wang , Dmitry Budker , Jiancheng Fang

We review topics in searches for axion-like-particles (ALPs), covering material that is complementary to other recent reviews. The first half of our review covers ALPs in the extreme environments of neutron star cores, the magnetospheres of…

High Energy Physics - Phenomenology · Physics 2021-06-16 Jean-François Fortin , Huai-Ke Guo , Steven P. Harris , Doojin Kim , Kuver Sinha , Chen Sun

Revealing the essence of dark matter (DM) and dark energy is essential for understanding our universe. Ultralight (rest energy $<$10 eV) bosonic particles, including pseudoscalar axions and axion-like particles (ALPs) have emerged among…

High Energy Physics - Experiment · Physics 2024-07-10 Xiaofei Huang , Xiaolin Ma , Lei Cong , Wei Ji , Jia Liu , Wei Quan , Kai Wei

In this article we present the Dark-photons$\&$Axion-Like particles Interferometer (DALI), a novel experiment designed for the detection of photon-mixing cold dark matter in the microwave band between 6 and 60 GHz. DALI is a haloscope for…

Instrumentation and Detectors · Physics 2021-04-29 Javier De Miguel-Hernández

Axions and axion-like particles (ALPs) arise naturally in many extensions of the Standard Model and are among the well-motivated candidates for dark matter. In the presence of magnetic fields of galaxy clusters, Cosmic Microwave Background…

Cosmology and Nongalactic Astrophysics · Physics 2026-03-11 Harsh Mehta , Anaya Dixit , Suvodip Mukherjee , Joseph Silk

In the past few years, the search for axion-like particles (ALPs) has grown significantly due to their potential to account for the total abundance of the cold dark matter (CDM) in the universe. The coupling between ALPs and photons allows…

High Energy Astrophysical Phenomena · Physics 2022-03-09 Ahmed Ayad , Geoff Beck

We present forecasts on the detectability of Ultra-light axion-like particles (ULAP) from future 21cm radio observations around the epoch of reionization (EoR). We show that the axion as the dominant dark matter component has a significant…

Cosmology and Nongalactic Astrophysics · Physics 2022-01-19 Cristiano G. Sabiu , Kenji Kadota , Jacobo Asorey , Inkyu Park

Searches for pseudoscalar axion-like-particles (ALPs) typically rely on their decay in beam dumps or their conversion into photons in haloscopes and helioscopes. We point out a new experimental direction for ALP probes through their…

High Energy Physics - Phenomenology · Physics 2020-06-24 James B. Dent , Bhaskar Dutta , Doojin Kim , Shu Liao , Rupak Mahapatra , Kuver Sinha , Adrian Thompson

We study ALP-photon-conversion within strong inhomogeneous electromagnetic fields as provided by contemporary high-intensity laser systems. We observe that probe photons traversing the focal spot of a superposition of Gaussian beams of a…

High Energy Physics - Phenomenology · Physics 2014-11-21 Babette Döbrich , Holger Gies

We propose an interferometry experiment for the detection of axion-like particles (ALPs). As in ordinary photon-regeneration (light shining through a wall) experiments, a laser beam traverses a region permeated by a magnetic field, where…

High Energy Physics - Phenomenology · Physics 2018-08-28 H. Tam , Q. Yang

The misalignment mechanism for axion-like particles (ALPs) is a leading explanation for dark matter. In this work we investigate ALPs with non-periodic potentials, which allow for large misalignment of the field from the minimum and make it…

High Energy Physics - Phenomenology · Physics 2024-02-19 Aleksandr Chatrchyan , Cem Eröncel , Matthias Koschnitzke , Géraldine Servant

Quantum fluctuations constitute the primary noise barrier limiting cavity-based axion dark matter searches. In an experiment designed to mimic a real axion search, we employ a quantum-enhanced sensing technique to detect a synthetic…

Axion-like particles (ALPs) are compelling candidates for dark matter and potential portals to new physics beyond the Standard Model. Photons traversing magnetized regions can convert into ALPs, producing characteristic, energy-dependent…

High Energy Astrophysical Phenomena · Physics 2026-01-23 Denys Malyshev , Lidiia Zadorozhna , Yuriy Bidasyuk , Andrea Santangelo , Oleg Ruchayskiy

Axion-like particles (ALPs) coupled to nucleons can be efficiently produced in core-collapse supernovae (SNe) and then, if they couple to photons, convert into gamma rays in cosmic magnetic fields, generating short gamma-ray bursts. Though…

High Energy Physics - Phenomenology · Physics 2025-12-05 Francesca Lecce , Alessandro Lella , Giuseppe Lucente , Maurizio Giannotti , Alessandro Mirizzi