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Choi, Kiwoon
순수물리이론 연구단
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Axion-photon-dark photon oscillation and its implication for 21-cm observation

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Title
Axion-photon-dark photon oscillation and its implication for 21-cm observation
Author(s)
Kiwoon Choi; Hyeonseok Seong; Seokhoon Yun
Subject
QCD AXION, ; MATTER
Publication Date
2020-10
Journal
PHYSICAL REVIEW D, v.102, no.7, pp.075024
Publisher
AMER PHYSICAL SOC
Abstract
© 2020 authors. Published by the American Physical Society. We examine the resonant conversion of axionlike particle (ALP) or dark photon to the electromagnetic photon in the early Universe, which takes place due to the ALP-photon-dark photon oscillations in background dark photon gauge fields. It is noted that the corresponding conversion probability can have an unusual spectral feature which allows strong conversion at low frequency domain, but has negligible conversion at high frequencies above certain critical frequency which is determined by the ALP coupling to dark photon and the strength of background dark photon gauge field. We apply this scheme to heat up the 21-cm photons without affecting the cosmic microwave background, which can explain the tentative absorption signal of 21-cm photons detected recently by the EDGES experiment
URI
https://pr.ibs.re.kr/handle/8788114/7579
DOI
10.1103/PhysRevD.102.075024
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
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