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Related papers: ALP Anarchy

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Axion like particles (ALPs) are fundamental pseudo scalar particles with properties similar to Axions which are a well-known extension of the standard model to solve the strong CP problem in Quantum Chromodynamics. ALPs can oscillate into…

High Energy Astrophysical Phenomena · Physics 2017-10-30 Jhilik Majumdar , Francesca Calore , Dieter Horns

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

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

Photons may convert to axion-like particles (ALPs) in external magnetic fields. Under certain conditions, this effect should result in irregular features in observed spectra of astrophysical sources. Lack of such irregularities in…

High Energy Astrophysical Phenomena · Physics 2020-01-30 Maxim Libanov , Sergey Troitsky

Axion-like particles (ALPs) are very light, neutral, spin zero bosons predicted by superstring theory. ALPs interact primarily with two photons and in the presence of an external magnetic field they generate photon-ALP oscillations and the…

High Energy Physics - Phenomenology · Physics 2022-04-29 Giorgio Galanti

We review the physics of ultralight axion-like particles (ALPs) as dark matter candidates and the experimental strategies used to search for them with precision and quantum technologies. In the ultralight regime, the enormous occupation…

High Energy Physics - Phenomenology · Physics 2026-03-25 Sreemanti Chakraborti

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

In light-shining-through-walls experiments, axions and axion-like particles (ALPs) are searched for by exposing an optically thick barrier to a laser beam. In a magnetic field, photons could convert into ALPs in front of the barrier and…

High Energy Physics - Phenomenology · Physics 2026-05-12 Vedran Brdar , Dibya S. Chattopadhyay

The growing interest in axion-like particles (ALPs) stems from the fact that they provide successful theoretical explanations of physics phenomena, from the anomaly of the CP-symmetry conservation in strong interactions to the observation…

High Energy Astrophysical Phenomena · Physics 2021-06-08 Ivana Batković , Alessandro De Angelis , Michele Doro , Marina Manganaro

Axion-like particles (ALPs) provide a compelling avenue for exploring physics beyond the Standard Model. In astrophysical magnetized plasmas an ALP-photon coupling $g_{a\gamma}$ induces energy-dependent oscillations in the photon survival…

High Energy Astrophysical Phenomena · Physics 2025-07-30 Yu Zhou , Jiejia Liu , Volodymyr Takhistov , Kazuhisa Mitsuda

Hypothetical axion-like particles (ALPs) are of interest because of their potential to act as dark matter or to reveal information about yet undiscovered fundamental constituents of matter. Such particles can be created when photons…

High Energy Astrophysical Phenomena · Physics 2025-08-19 Denys Malyshev , Lidiia Zadorozhna , Yuriy Bidasyuk , Andrea Santangelo , Oleg Ruchayskiy

Machine learning (ML) techniques have been applied with tremendous success in many areas of physics. In this work, we use ML to place bounds on the coupling between photons and axion-like particles (ALPs). This coupling causes ALPs and…

High Energy Astrophysical Phenomena · Physics 2020-03-24 Francesca Day , Sven Krippendorf

In this work, we extend the standard pre-inflationary misalignment mechanism for axion-like particles (ALPs) by introducing a pre-oscillatory phase with constant equation of state $\omega_\phi\in[-1,1]$, generated by a tracking potential.…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-08 José María Pérez-Poyatos

The high-energy Universe is potentially a great laboratory for searching new light bosons such as axion-like particles (ALPs). Cosmic sources are indeed the scene of violent phenomena that involve strong magnetic field and/or very long…

High Energy Astrophysical Phenomena · Physics 2015-06-15 Pierre Brun

Axion-like particles (ALPs) emerge in many extensions of the Standard Model as pseudo-Goldstone bosons of a spontaneously broken global symmetry. Understanding their phenomenology in high-energy collisions is crucial for optimizing…

High Energy Physics - Phenomenology · Physics 2024-04-04 Giovani Dalla Valle Garcia , Felix Kahlhoefer , Maksym Ovchynnikov , Andrii Zaporozhchenko

Axion-like particles (ALPs) are known to be produced through axion-photon conversion in the presence of a stationary external magnetic field. Devices such as undulators and wigglers, which are used widely for photon production, e.g., in…

High Energy Physics - Phenomenology · Physics 2024-09-24 Wen Yin , Junya Yoshida

Axions or more generally axion-like particles (ALPs) are pseudo-scalar particles predicted by many extensions of the Standard Model of particle physics (SM) and considered as viable candidates for dark matter (DM) in the universe. If they…

High Energy Astrophysical Phenomena · Physics 2020-05-20 Ahmed Ayad , Geoff Beck

There exists a growing evidence for the anomalous transparency of the Universe for energetic gamma rays. Popular explanations include conversion of photons into hypothetical axion-like particles (ALPs) and back in astrophysical magnetic…

High Energy Astrophysical Phenomena · Physics 2016-02-17 Sergey Troitsky

Short-baseline reactor neutrino experiments using large organic liquid scintillator detectors provide an experimentally rich environment for precise neutrino physics. Neutrino detection is done through inverse beta decay and relies on…

High Energy Physics - Phenomenology · Physics 2025-11-04 D. Aristizabal Sierra , L. Duque , O. Miranda , H. Nunokawa

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