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 baselines, where the effects of the mixing of photons with ...
Importance of axion-like particles for very-high-energy astrophysics 10.1103/Phys- RevD.84.105030A. De Angelis, G. Galanti and M. Roncadelli, "Relevance of axion-like particles for very-high-energy astrophysics," Phys. Rev. D 84, 105030 (2011) [arXiv:1106.1132 [astro-ph.HE]]....
yiyang@ncku.edu.twAbstract: We propose a novel way to search for axion(-like) particles in heavy-ion col-lisions using prompt photons as the probe and the property of conversion between photonand axion(-like) particles under a strong magnetic f i eld generated in the non-central colli-sio...
XFELs join hunt for axion-like particles5 July 2024 New territory Bounds on the axion–photon coupling from the latest study (pink) compared with those from previous results from synchrotron X-ray facilities (purple) and other lab searches. Credit: arXiv:2404.17333 A first-of-its-kind ...
Axion-like particles (ALPs), which are pseudo-scalar particles, appear in various new physics models with the spontaneous global symmetry breaking. The difference between ALPs and axion models is that for the former both masses and couplings of ALPs are free parameters. It appears that the ALPs...
SNax is a code that calculates the signals of axion-like particles (ALPs) from supernovae (SNe). It provides likelihood computations for ALP conversions in the Galactic magnetic field and ALP decays after SN 1987A. The code was developed and improved by Sebastian Hoof and Lena Schulz. Please...
Oscillations from high energy photons into Axion Like Particles (ALPs) in an external magnetic field are expected to leave an imprint on the spectra of astrophysical γ-ray sources. We show that the usual observables, that are a drop in the energy spectra and a boost of fluxes at very-high...
one would require new physics to explain the data. One possibility invokes axion-like particles (ALPs) which mix with photons but do not attenuate on the background radiation. Here we explore the ALP parameter space and find that the ALP-photon mixing in the Milky Way, and not in the inte...
The motion of gravitational axion-like particles (ALPs) around a Kerr black hole is analyzed, paying attention to the resonance and distribution of spectral radiation. We first discuss the computation of gRμνρρσRμνρσ and its implications with Pontryagin's theorem, and then a detailed ...
1. Axion and Axion-Like-Particles The presentation of a new fundamental particle called ‘axion’ traces back to the late 1970s, when Peccei and Quinn [1] introduced it as a possible solution to the otherwise-unexplained missing 𝐶𝑃CP-simmetry violation in strong interactions. The term ...