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Axionlike particles (ALPs) are a common prediction of theories beyond the Standard Model of particle physics that could explain the entirety of the cold dark matter. These particles could be detected through their mixing with photons in…

High Energy Astrophysical Phenomena · Physics 2019-08-14 Manuel Meyer

Axion-like particles (ALPs) are a common prediction of several extensions of the Standard Model of particle physics and could be detected through their coupling to photons, which enables ALP-photon conversions in external magnetic fields.…

High Energy Astrophysical Phenomena · Physics 2025-09-30 Francesco Schiavone , Leonardo Di Venere , Francesco Giordano

Axion-like particles (ALPs) are well-motivated examples of light, weakly coupled particles in theories beyond the Standard Model. In this work, we study long-lived ALPs coupled exclusively to leptons in the mass range between $2 m_e$ and…

High Energy Physics - Phenomenology · Physics 2025-07-22 Yohei Ema , Patrick J. Fox , Matheus Hostert , Tony Menzo , Maxim Pospelov , Anupam Ray , Jure Zupan

Axionlike particles (ALPs) can be produced in the Sun, and are considered viable candidates for the cosmological dark matter (DM). It can decay into two photons or interact with matter. We identify new inelastic channels of inverse…

High Energy Physics - Phenomenology · Physics 2023-08-29 C. -P. Wu , C. -P. Liu , Greeshma C. , L. Singh , J. -W. Chen , H. -C. Chi , M. K. Pandey , H. T. Wong

Axion-like particles (ALPs) provide a promising direction in the search for new physics, while a wide range of models incorporate ALPs. We point out that future neutrino experiments, such as DUNE, possess competitive sensitivity to ALP…

High Energy Physics - Phenomenology · Physics 2021-05-19 Vedran Brdar , Bhaskar Dutta , Wooyoung Jang , Doojin Kim , Ian M. Shoemaker , Zahra Tabrizi , Adrian Thompson , Jaehoon Yu

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

Several extensions of the Standard Model predict the existence of Axion-Like Particles (ALPs), very light spin-zero bosons with a two-photon coupling. ALPs can give rise to observable effects in very-high-energy astrophysics. Above roughly…

High Energy Astrophysical Phenomena · Physics 2015-06-05 Marco Roncadelli , Alessandro De Angelis , Giorgio Galanti

We study the discovery potential of axion-like particles (ALP), pseudo-scalars weakly coupled to Standard Model fields, at the Large Hadron Collider (LHC). Our focus is on ALPs coupled to the electromagnetic field, which would induce…

High Energy Physics - Phenomenology · Physics 2019-06-20 C. Baldenegro , S. Hassani , C. Royon , L. Schoeffel

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

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

We revisit the theory and constraints on axion-like particles (ALPs) interacting with leptons. We clarify some subtleties in the constraints on ALP parameter space and find several new opportunities for ALP detection. We identify a…

High Energy Physics - Phenomenology · Physics 2023-06-23 Wolfgang Altmannshofer , Jeff A. Dror , Stefania Gori

Axion-like particles (ALPs) are attracting increasing interest since, among other things, they are a prediction of many extensions of the standard model of elementary particles physics and in particular of superstrings and superbranes.…

High Energy Astrophysical Phenomena · Physics 2019-07-23 Giorgio Galanti , Marco Roncadelli

We give an overview of collider searches for Axion-like particles (ALPs). The intention of this review is to give a pedagogical introduction to collider phenomenology of ALPs, and provide a starting point for newcomers, including suitable…

High Energy Physics - Phenomenology · Physics 2025-08-28 Anke Biekötter , Ken Mimasu

In this work we revisit five different point sources within or behind galaxy clusters in order to constrain the coupling constant between axion-like particles (ALPs) and photons. We use three distinct machine learning (ML) techniques and…

Cosmology and Nongalactic Astrophysics · Physics 2022-06-15 Simon Schallmoser , Sven Krippendorf , Francesca Chadha-Day , Jochen Weller

We propose a search for long lived axion-like particles (ALPs) in exotic top decays. Flavour-violating ALPs appear as low energy effective theories for various new physics scenarios such as t-channel dark sectors or Froggatt-Nielsen models.…

High Energy Physics - Phenomenology · Physics 2022-10-21 Adrian Carmona , Fatemeh Elahi , Christiane Scherb , Pedro Schwaller

Axion-like particles (ALPs) are well-motivated extensions of the standard model (SM) that appear in numerous new physics scenarios. In this paper, we concentrate on searches for long-lived ALPs predicted by the photophobic scenario at the…

High Energy Physics - Phenomenology · Physics 2026-01-09 Chong-Xing Yue , Xin-Yang Li , Shuo Yang , Mei-Shu-Yu Wang

Axion-Like-Particles (ALPs) are hypothetical pseudo-scalar particles actively searched as light dark matter candidates. The coupling of ALPs to photons can give rise to distinctive spectral features in the observed gamma-ray spectrum of…

High Energy Astrophysical Phenomena · Physics 2026-03-13 Cervane Grimaud , Denys Malyshev , Emmanuel Moulin

Reactor neutrino experiments provide a rich environment for the study of axionlike particles (ALPs). Using the intense photon flux produced in the nuclear reactor core, these experiments have the potential to probe ALPs with masses below 10…

High Energy Physics - Phenomenology · Physics 2020-11-05 D. Aristizabal Sierra , V. De Romeri , L. J. Flores , D. K. Papoulias

A consistent treatment of the quantum field theory of an axion-like particle (ALP) interacting with Standard Model fields requires to account for renormalisation group running and matching to the low-energy theory. Quantum sensor…

High Energy Physics - Phenomenology · Physics 2025-05-15 Martin Bauer , Sreemanti Chakraborti , Guillaume Rostagni

Axion-like particles $a$ (ALPs) that couple to the Standard Model (SM) gauge fields could be observed in the high-energy photon scattering $\gamma N\to N a$ off nuclei followed by the $a\to \gamma\gamma$ decay. In the present paper we…

High Energy Physics - Phenomenology · Physics 2020-10-07 R. R. Dusaev , D. V. Kirpichnikov , M. M. Kirsanov