Year: 2025
Type: conference-paper
Abstract: Axion-like particles (ALPs) are hypothetical pseudoscalar particles predicted in several extensions of the Standard Model. These particles have the potential to address both the dark matter problem and the strong CP problem. One method to detect ALPs is through the phenomenon of ALP-photon oscillation in the presence of magnetic fields. In high-energy astrophysics, ALP-photon oscillation can manifest as an increased transparency of TeV gamma rays from extragalactic sources. In this work, we present a search for ALPs using gamma-ray observations of VER J0521+211, obtained with the High-Altitude Water Cherenkov (HAWC) Observatory. For the blazar, we calculate the photon survival probabilities across different regions of the ALP parameter space, assuming both the presence and absence of ALPs. By fitting the expected spectra of these two scenarios and comparing the resulting likelihoods, we establish upper limits on the parameters of ALPs. We present new constraints on the coupling strength between ALPs and photons for ALP masses in the neV range.
DOI: 10.22323/1.501.0538
Authors: Ian Watson, Youngwan Son
Institution: University of Seoul
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, European Commission, National Research Foundation, Consejo Nacional de Ciencia y Tecnología, National Research Foundation of Korea, Benemérita Universidad Autónoma de Puebla, Office of National Higher Education Science Research and Innovation Policy Council, Goddard Space Flight Center, Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México, Coordinación de la Investigación Científica, Institute for Cosmic Ray Research, University of Tokyo, Laboratory Directed Research and Development, Los Alamos National Laboratory
Awards: G1012113107, G1137351982, G1477402476, G1943778919, G201248631, G20842220, G227081073, G2834597881, G3092080779, G3432588090, G3455266465, G3650325917, G4234058003, G4385750942, G4656072107, G4673649240, G4840023426, G5185440073, G5756405743, G5928845074, G5984383661, G6809838226, G6866600364, G6958583472, G7223072566, G726386190, G7379686924, G7757046036, G8432112341, G8651248068, G8700648374
OpenAlex ID: W4414492999
FWCI:
Cites:
Cited by:
Related to: