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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

A review of the status of axions and axion-like particles is given. Special attention is devoted to the recent results of the PVLAS collaboration, which are in conflict with the CAST data and with the astrophysical constraints. Solutions to…

High Energy Physics - Phenomenology · Physics 2008-11-26 Eduard Masso

Axion-like particles (ALPs) are good candidates for mediators to the dark sector. We explore scenarios in which an ALP mediates interactions between dark matter and electroweak gauge bosons. These models yield testable electromagnetic…

High Energy Physics - Phenomenology · Physics 2024-05-31 Stephanie Allen , Albany Blackburn , Oswaldo Cardenas , Zoe Messenger , Ngan H. Nguyen , Brian Shuve

Axion-like particles (ALP) are promising candidates to comprise all the dark matter in the universe. We investigate the ALP couplings to photons and electrons via astrophysical measurements through the search for very-high-energy gamma rays…

High Energy Astrophysical Phenomena · Physics 2025-01-23 Victor P. Goncalves , Emmanuel Moulin , Igor Reis , Aion Viana

Axion-like particles (ALPs), a class of pseudoscalars common to many extensions of the Standard Model, have the capacity to drain energy from the interiors of stars. Consequently, stellar evolution can be used to derive many constraints on…

High Energy Physics - Phenomenology · Physics 2021-09-16 Matthew J. Dolan , Frederick J. Hiskens , Raymond R. Volkas

The existence of an axion-like particle (ALP) would induce anomalous scattering of light by light. This process can be probed at the Large Hadron Collider in central exclusive production of photon pairs in proton-proton collisions by…

High Energy Physics - Phenomenology · Physics 2018-08-01 Cristian Baldenegro , Sylvain Fichet , Gero von Gersdorff , Christophe Royon

The search for axions and axion-like particles (ALPs) remains a major endeavor in modern physics investigation. Axions play essential roles in the quest to understand dark matter, the strong CP problem, and various astrophysical phenomena.…

High Energy Physics - Phenomenology · Physics 2024-12-13 Maurizio Giannotti

Axion-like particles (ALPs), relatively light (pseudo-)scalars coupled to two gauge bosons, are a common feature of many extensions of the Standard Model. Up to now there has been a gap in the sensitivity to such particles in the MeV to 10…

High Energy Physics - Phenomenology · Physics 2015-12-23 Joerg Jaeckel , Michael Spannowsky

We consider the search for axion-like particles (ALPs) by using time series data of the polarization angle of the light. If the condensation of an ALP plays the role of dark matter, the polarization plane of the light oscillates as a…

Cosmology and Nongalactic Astrophysics · Physics 2020-02-19 So Chigusa , Takeo Moroi , Kazunori Nakayama

Axion-like particles (ALPs) are predicted by many extensions of the Standard Model (SM). When ALP mass lies in the range of MeV to GeV, the cosmology and astrophysics will be largely irrelevant. In this work, we investigate such light ALPs…

High Energy Physics - Phenomenology · Physics 2021-12-01 Daohan Wang , Lei Wu , Jin Min Yang , Mengchao Zhang

Axion-like particles (ALPs) are well-motivated extensions of the Standard Model (SM) that appear in many new physics scenarios, with masses spanning a broad range. In this work, we systematically study the production and detection prospects…

High Energy Physics - Phenomenology · Physics 2025-10-22 Shou-shan Bao , Yang Ma , Yongcheng Wu , Keping Xie , Hong Zhang

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

X-ray telescopes are an exceptional tool for searching for new fundamental physics. In particular, X-ray observations have already placed world-leading bounds on the interaction between photons and axion-like particles (ALPs). ALPs are…

High Energy Physics - Phenomenology · Physics 2018-04-11 Francesca Day , Sven Krippendorf

Various satellite-borne missions are being planned whose goal is to measure the polarization of a large number of gamma-ray bursts (GRBs). We show that the polarization pattern predicted by current models of GRB emission can be drastically…

High Energy Astrophysical Phenomena · Physics 2014-11-20 Nicola Bassan , Alessandro Mirizzi , Marco Roncadelli

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

The hypothetical axion and axion-like particles, feebly coupled with photon, have not yet been found in any experiment. With the improvement of laser technique, much stronger but shorter quasi-static electric and magnetic fields can be…

High Energy Physics - Phenomenology · Physics 2022-09-07 Shan Huang , Baifei Shen , Zhigang Bu , Xiaomei Zhang , Liangliang Ji , Shuhua Zhai

We propose an experiment for detecting Axion-Like Particles (ALPs) based on the axion-photon interaction in the presence of a non-uniform magnetic field. The impact of virtual ALPs on the polarization of the photons inside a cavity is…

High Energy Physics - Phenomenology · Physics 2022-06-22 Moslem Zarei , Soroush Shakeri , Mohammad Sharifian , Mehdi Abdi , David J. E. Marsh , Sabino Matarrese

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

Many extensions of the Standard Model predict the existence of ALPs, which are very light spin-zero bosons with a two-photon coupling. Photon-ALP oscillations occur in the presence of an external magnetic field, and ALPs can lead to…

High Energy Astrophysical Phenomena · Physics 2015-03-19 Alessandro De Angelis , Giorgio Galanti , Marco Roncadelli

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