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The axion-like particle (ALP) is one of the best motivated particles beyond the Standard Model (SM). We explore the possibility of detecting the couplings of ALP with leptons via three-lepton final state processes $e^- p \to e^- j a~(a \to…

High Energy Physics - Phenomenology · Physics 2025-04-03 Chong-Xing Yue , Xin-Yang Li , Mei-Shu-Yu Wang , Yang-Yang Bu

Axion-like particles (ALPs) are ubiquitous in models of new physics explaining some of the most pressing puzzles of the Standard Model. However, until relatively recently, little attention has been paid to its interplay with flavour. In…

High Energy Physics - Phenomenology · Physics 2021-09-15 Adrian Carmona , Christiane Scherb , Pedro Schwaller

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

An axion-like-particle (ALP) in the post-inflationary scenario with domain wall number $N>1$ can be dark matter if the residual $\mathbb{Z}_N$ symmetry has a small explicit breaking. Although we cannot determine the full dynamics of the…

High Energy Physics - Phenomenology · Physics 2023-05-24 Marco Gorghetto , Edward Hardy

Axion-like particles (ALPs) with couplings to electromagnetism have long been postulated as extensions to the Standard Model. String theory predicts an "axiverse" of many light axions, some of which may make up the dark matter in the…

High Energy Physics - Phenomenology · Physics 2019-07-17 Zachary Bogorad , Anson Hook , Yonatan Kahn , Yotam Soreq

We show results from the Coherent CAPTAIN Mills (CCM) 2019 engineering run which begin to constrain regions of parameter space for axion-like particles (ALPs) produced in electromagnetic particle showers in an 800 MeV proton beam dump, and…

Experimental searches for Axion-Like Particles (ALPs) which couple to the electroweak bosons span over a wide range of ALP masses, from MeV searches at beam-dump experiments, to TeV searches at the LHC. Here we examine an interesting range…

High Energy Physics - Phenomenology · Physics 2021-08-27 Noah Steinberg

One of the fundamental results used in observational cosmology is the distance duality relation (DDR), which relates the luminosity distance, $D_L$, with angular diameter distance, $D_A$, at a given redshift $z$. We employ the observed…

Cosmology and Nongalactic Astrophysics · Physics 2017-02-01 Prabhakar Tiwari

We study prospects to detect axion-like particles (ALPs) with the upcoming near-infrared telescope SPHEREx. The signal under investigation is the ALP decay into two photons. Assuming dark matter (DM) to be in the form of ALPs, we analyze…

Cosmology and Nongalactic Astrophysics · Physics 2025-05-09 Marco Regis , Marco Taoso , Jorge Terol Calvo

Presented is the search for anomalous Higgs boson decays into two axion-like particles (ALPs) using the full Run 2 data set of 140 fb$^{-1}$ of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS experiment.…

High Energy Physics - Experiment · Physics 2024-12-18 ATLAS Collaboration

We consider a muonphilic axion-like-particle (ALP), denoted as $a$, lighter than twice the muon mass. ALPs of this mass range dominantly decay into a pair of photons, induced by a triangular muon loop. Such light muonphilic ALPs are…

High Energy Physics - Phenomenology · Physics 2022-12-07 Kingman Cheung , Jui-Lin Kuo , Po-Yan Tseng , Zeren Simon Wang

The exploration of long-lived particles in the MeV-GeV region is a formidable task but it may provide us a unique access to dark sectors. Fixed-target facilities with sufficiently energetic and intense proton beams are an ideal tool for…

High Energy Physics - Phenomenology · Physics 2020-10-28 Babette Döbrich , Joerg Jaeckel , Tommaso Spadaro

In order to constrain ultra light dark matter models with current and near future weak lensing surveys we need the predictions for the non-linear dark matter power-spectrum. This is commonly extracted from numerical simulations or from…

Cosmology and Nongalactic Astrophysics · Physics 2025-10-15 Dennis Fremstad , Hans A. Winther

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 highly viable candidates for dark matter (DM) in the universe. If…

High Energy Astrophysical Phenomena · Physics 2019-11-25 Ahmed Ayad , Geoff Beck

Axion-like particles (ALPs) are pseudo Nambu-Goldstone bosons associated with spontaneously broken global symmetries emerging in many extensions of the Standard Model. Assuming the most general effective Lagrangian up to dimension-5…

High Energy Physics - Phenomenology · Physics 2020-12-08 Gholamhossein Haghighat , Daruosh Haji Raissi , Mojtaba Mohammadi Najafabadi

The idea that photons can convert into axion-like particles (ALPs) $\gamma \to a$ in or around an AGN and reconvert back into photons $a \to \gamma$ in the Milky Way magnetic field has been put forward in 2008 and has recently attracted…

High Energy Astrophysical Phenomena · Physics 2015-05-20 Fabrizio Tavecchio , Marco Roncadelli , Giorgio Galanti

One kind of particularly interesting pseudoscalar particles, called axion-like particles (ALPs), have rich physical phenomenology at high- and low-energy collider experiments. After discussing most of single production channels of ALP at…

High Energy Physics - Phenomenology · Physics 2022-01-25 Chong-Xing Yue , Hua-Ying Zhang , Han Wang

Aleatoric uncertainty is an intrinsic property of ill-posed inverse and imaging problems. Its quantification is vital for assessing the reliability of relevant point estimates. In this paper, we propose an efficient framework for…

Image and Video Processing · Electrical Eng. & Systems 2020-01-16 Chen Zhang , Bangti Jin

Axion-like particles (ALPs) produced in the core of a magnetar will convert to photons in the magnetosphere, leading to possible signatures in the hard X-ray band. We perform a detailed calculation of the ALP-to-photon conversion…

High Energy Physics - Phenomenology · Physics 2019-02-15 Jean-François Fortin , Kuver Sinha

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