Hidden monopole dark matter via axion portal and its implications for direct detection searches, beam-dump experiments, and the H 0 tension

Ryuji Daido; Shu Yu Ho; Fuminobu Takahashi

doi:10.1007/JHEP01(2020)185

Hidden monopole dark matter via axion portal and its implications for direct detection searches, beam-dump experiments, and the H ₀ tension

Ryuji Daido, Shu Yu Ho, Fuminobu Takahashi

SCI - Physics

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Hidden monopole is a plausible dark matter candidate due to its stability, but its direct experimental search is extremely difficult due to feeble interactions with the standard model particles in the minimal form. Then, we introduce an axion, a, connecting the hidden monopole and the standard model particles and examine the current limits and future prospects of direct dark matter searches and beam-dump experiments. We find two parameter regions around m_a = O(10) MeV, f_a = O(10⁵) GeV and m_a = O(100) MeV, f_a = O(10⁴) GeV where monopole dark matter and the axion are respectively within the reach of the future experiments such as PICO-500 and SHiP. We also note that the hidden photons mainly produced by the axion decay contribute to dark radiation with ∆N_eff ≃ 0.6 which can relax the H₀ tension.

Original language	English
Article number	185
Journal	Journal of High Energy Physics
Volume	2020
Issue number	1
DOIs	https://doi.org/10.1007/JHEP01(2020)185
Publication status	Published - 2020 Jan 1

Keywords

Phenomenological Models

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1007/JHEP01(2020)185

Cite this

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abstract = "Hidden monopole is a plausible dark matter candidate due to its stability, but its direct experimental search is extremely difficult due to feeble interactions with the standard model particles in the minimal form. Then, we introduce an axion, a, connecting the hidden monopole and the standard model particles and examine the current limits and future prospects of direct dark matter searches and beam-dump experiments. We find two parameter regions around ma = O(10) MeV, fa = O(105) GeV and ma = O(100) MeV, fa = O(104) GeV where monopole dark matter and the axion are respectively within the reach of the future experiments such as PICO-500 and SHiP. We also note that the hidden photons mainly produced by the axion decay contribute to dark radiation with ∆Neff ≃ 0.6 which can relax the H0 tension.",

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N1 - Funding Information: This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited Publisher Copyright: © 2020, The Author(s).

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