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Axion-like particles (ALPs), predicted in theories beyond the Standard Model, can have observational effects on the transparency of the Universe to $\gamma$ rays in the presence of magnetic fields. In this work, we search for effects…

High Energy Astrophysical Phenomena · Physics 2020-10-30 Rolf Buehler , Galo Gallardo , Gernot Maier , Alberto Domínguez , Marcos López , Manuel Meyer

A tool that can constrain, in minutes, beyond-the-standard-model parameters like electric dipole moments (EDM) down to a lower-bound $d_\text{e}^{\cal{N}}<10^{-37}\text{e}\cdot\text{cm}$ in bulk materials, or the coupling of axion-like…

Instrumentation and Methods for Astrophysics · Physics 2016-04-11 Gary Prezeau

Axion-like particles (ALPs) are light, neutral, pseudo-scalar bosons predicted by several extensions of the Standard Model of particle physics -- such as the String Theory -- and are supposed to interact primarily only with two photons. In…

High Energy Astrophysical Phenomena · Physics 2019-11-22 Giorgio Galanti

We report on a search for dark matter axion-like particles (ALPs) using a Ramsey-type apparatus for cold neutrons. A hypothetical ALP-gluon-coupling would manifest in a neutron electric dipole moment signal oscillating in time. Twenty-four…

We review the physics case for very weakly coupled ultralight particles beyond the Standard Model, in particular for axions and axion-like particles (ALPs): (i) the axionic solution of the strong CP problem and its embedding in well…

High Energy Physics - Phenomenology · Physics 2013-10-07 A. Ringwald

Axion-like particles (ALPs), the QCD axion, and dark photons in the MeV-GeV mass range are motivated by various dark matter models and the strong CP problem, and are ubiquitous in extensions of the Standard Model. A long-standing blind spot…

High Energy Physics - Phenomenology · Physics 2026-04-20 Sarah Gaiser , Alessandro Russo , Philip Schuster

Axions and axion-like particles emerge in many models for physics beyond the Standard Model. Thus, they have gained increasing research interest in both experimental and theoretical physics apart from their original proposition as a…

High Energy Physics - Phenomenology · Physics 2024-06-07 Matthias Neubert , Marvin Schnubel

The chiral magnetic effect (CME) is a quantum relativistic effect that describes the appearance of an additional electric current along a magnetic field. It is caused by an asymmetry between the number densities of left- and right-handed…

Plasma Physics · Physics 2019-12-16 Jennifer Schober , Axel Brandenburg , Igor Rogachevskii

We revisit the possibility that light axion-like particles (ALPs) with lepton flavor violating couplings could give significant contributions to the electron's anomalous magnetic moment $g_e-2$. Unlike flavor diagonal lepton-ALP couplings,…

High Energy Physics - Phenomenology · Physics 2024-07-08 Hooman Davoudiasl , Roman Marcarelli , Ethan T. Neil

Quantum sensors based on the superposition of neutral atoms are promising for sensing the nature of dark matter (DM). In this study, we utilize the Stern-Gerlach (SG) interferometer configuration to seek a novel method for the detection of…

High Energy Physics - Phenomenology · Physics 2023-01-24 Milad Hajebrahimi , Hassan Manshouri , Mohammad Sharifian , Moslem Zarei

We elaborate the quasiclassical approach to obtain the modified chiral magnetic effect in the case when massless charged fermions interact with electromagnetic fields and the background matter by the electroweak forces. The derivation of…

High Energy Physics - Phenomenology · Physics 2018-03-16 Maxim Dvornikov , Victor B. Semikoz

The Axion Like Particle (ALP) is a hypothetical pseudo-scalar particle beyond the Standard Model, with a compelling possible connection to dark matter and early universe physics. ALPs can be converted into photons via interactions with…

High Energy Astrophysical Phenomena · Physics 2020-03-04 Ryo Yamamoto , Noriko Y. Yamasaki , Kazuhisa Mitsuda , Masahiro Takada

Photons propagating in an external magnetic field may oscillate into axions or axion-like particles (ALPs). Such oscillations will lead to characteristic features in the energy spectrum of high-energy photons from astrophysical sources that…

High Energy Astrophysical Phenomena · Physics 2022-01-26 M. Kachelriess , J. Tjemsland

The chiral magnetic effect (CME) is a phenomenon in which electric charge is separated by a strong magnetic field from local domains of chirality imbalance in quantum chromodynamics. The CME-sensitive azimuthal correlator difference…

Nuclear Theory · Physics 2026-05-26 Han-Sheng Li , Yu-Shan Chang , Yi Yang , Fuqiang Wang

Axion-like particles (ALPs) are undiscovered pseudo-scalar particles that are candidates for ultralight dark matter. ALPs interact with photons slightly and cause the rotational oscillation of linearly polarized light. Dark matter Axion…

Instrumentation and Detectors · Physics 2022-03-02 Hiroki Fujimoto , Yuka Oshima , Masaki Ando , Tomohiro Fujita , Yuta Michimura , Koji Nagano , Ippei Obata

In the presence of a background magnetic field, axions or axion-like particles (ALPs) can be resonantly converted to photons when their mass is nearly equal to the effective photon mass. In this paper, we propose a novel method to constrain…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-21 Ashu Kushwaha , Rajeev Kumar Jain

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

Detecting axionic dark matter induced electron or nucleon oscillating electric dipole moment (OEDM) has become a new way for dark matter searches. We re-examine such axion-spin couplings in external electromagnetic fields. We point out that…

High Energy Physics - Phenomenology · Physics 2021-06-30 Zihang Wang , Lijing Shao

The axion-like particles (ALPs) are very good candidates of the cosmological dark matter, which can exist in many extensions of the standard model (SM). The mass range of the ALPs as the dark matter can extend from a sub-eV scale to almost…

High Energy Physics - Phenomenology · Physics 2018-12-05 Guo-yuan Huang , Newton Nath

Axions, originally proposed to solve the strong CP problem of quantum chromodynamics, emerge now as leading candidates of WISP dark matter. The rich phenomenology associated to the light and stable QCD axion can be described as an effective…

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