Axion-like particles and high energy astrophysics
Axion-like particles (ALPs) are light, neutral, pseudo-scalar bosons predicted by several extensions of the Standard Model of particle physics -- such as the String Theory -- and are supposed to interact primarily only with two photons. In the presence of an external magnetic field, photon-ALP oscil...
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ftdatacite:10.48550/arxiv.1911.09372 2023-05-15T18:30:51+02:00 Axion-like particles and high energy astrophysics Galanti, Giorgio 2019 https://dx.doi.org/10.48550/arxiv.1911.09372 https://arxiv.org/abs/1911.09372 unknown arXiv arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ High Energy Astrophysical Phenomena astro-ph.HE High Energy Physics - Phenomenology hep-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2019 ftdatacite https://doi.org/10.48550/arxiv.1911.09372 2022-03-10T16:23:21Z Axion-like particles (ALPs) are light, neutral, pseudo-scalar bosons predicted by several extensions of the Standard Model of particle physics -- such as the String Theory -- and are supposed to interact primarily only with two photons. In the presence of an external magnetic field, photon-ALP oscillations occur and can produce sizable astrophysical effects in the very-high energy (VHE) band ($100 \, {\rm GeV} - 100 \, {\rm TeV}$). Photon-ALP oscillations increase the transparency of the Universe to VHE photons partially preventing the gamma-gamma absorption caused by the Extragalactic Background Light (EBL). Moreover, they have important implications for active galactic nuclei (AGN) by modifying their observed spectra both for flat spectrum radio quasars (FSRQs) and BL Lacs. Many attempts have been made in order to constrain the ALP parameter space by studying irregularities in spectra due to photon-ALP conversion in galaxy clusters and the consequences of ALP emission by stars. Upcoming new VHE photon detectors like CTA, HAWC, GAMMA-400, LHAASO, TAIGA-HiSCORE, HERD and ASTRI will settle the issue. : 6 pages, 3 figures, Proceeding of "PHOTON 2019 - International Conference on the Structure and the Interactions of the Photon", June 3-7, 2019, Frascati - Italy, Frascati Physics Series Vol. 69 (2019) Article in Journal/Newspaper taiga DataCite Metadata Store (German National Library of Science and Technology) |
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High Energy Astrophysical Phenomena astro-ph.HE High Energy Physics - Phenomenology hep-ph FOS Physical sciences |
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High Energy Astrophysical Phenomena astro-ph.HE High Energy Physics - Phenomenology hep-ph FOS Physical sciences Galanti, Giorgio Axion-like particles and high energy astrophysics |
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High Energy Astrophysical Phenomena astro-ph.HE High Energy Physics - Phenomenology hep-ph FOS Physical sciences |
description |
Axion-like particles (ALPs) are light, neutral, pseudo-scalar bosons predicted by several extensions of the Standard Model of particle physics -- such as the String Theory -- and are supposed to interact primarily only with two photons. In the presence of an external magnetic field, photon-ALP oscillations occur and can produce sizable astrophysical effects in the very-high energy (VHE) band ($100 \, {\rm GeV} - 100 \, {\rm TeV}$). Photon-ALP oscillations increase the transparency of the Universe to VHE photons partially preventing the gamma-gamma absorption caused by the Extragalactic Background Light (EBL). Moreover, they have important implications for active galactic nuclei (AGN) by modifying their observed spectra both for flat spectrum radio quasars (FSRQs) and BL Lacs. Many attempts have been made in order to constrain the ALP parameter space by studying irregularities in spectra due to photon-ALP conversion in galaxy clusters and the consequences of ALP emission by stars. Upcoming new VHE photon detectors like CTA, HAWC, GAMMA-400, LHAASO, TAIGA-HiSCORE, HERD and ASTRI will settle the issue. : 6 pages, 3 figures, Proceeding of "PHOTON 2019 - International Conference on the Structure and the Interactions of the Photon", June 3-7, 2019, Frascati - Italy, Frascati Physics Series Vol. 69 (2019) |
format |
Article in Journal/Newspaper |
author |
Galanti, Giorgio |
author_facet |
Galanti, Giorgio |
author_sort |
Galanti, Giorgio |
title |
Axion-like particles and high energy astrophysics |
title_short |
Axion-like particles and high energy astrophysics |
title_full |
Axion-like particles and high energy astrophysics |
title_fullStr |
Axion-like particles and high energy astrophysics |
title_full_unstemmed |
Axion-like particles and high energy astrophysics |
title_sort |
axion-like particles and high energy astrophysics |
publisher |
arXiv |
publishDate |
2019 |
url |
https://dx.doi.org/10.48550/arxiv.1911.09372 https://arxiv.org/abs/1911.09372 |
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taiga |
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taiga |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1911.09372 |
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1766214456062246912 |