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2019 年度 実績報告書

WIMPパラダイムを超えるダークマターの包括的研究

研究課題

研究課題/領域番号 19J10946
研究機関東北大学

研究代表者

Ho ShuーYu  東北大学, 理学研究科, 特別研究員(DC2)

研究期間 (年度) 2019-04-25 – 2021-03-31
キーワードhidden monopole / axion portal coupling
研究実績の概要

In the first year of my research, I studied the hidden monopole dark matter (DM), which is an attractive DM model since the stability of the monopole DM is ensured by the topological nature and it can be produced naturally during the phase transition in the early universe.
In my study, I try to connect the hidden monopole DM to the visible sector by the axion portal coupling, and then it can be tested by the current and future direct search experiments such as COUPP and PICO. I also consider the constraints from the beam dump experiments because they can probe the axion-like particles. By comparing our results to these experiments, I found parameter regions where this model can be examined.
I published my result to JHEP and gave related presentations at many international conferences.

現在までの達成度 (区分)
現在までの達成度 (区分)

1: 当初の計画以上に進展している

理由

I studied a dark matter model beyond the WIMP paradigm and submitted my result to the international journal, JHEP, and it had been accepted. To advertise my research work further, I attended many overseas conferences, domestic workshops, and group seminars, where I received a lot of questions and feedback improving my result.
Meanwhile, I am interested in the hidden sector since it may include the candidates for dark matter while resolve some cosmological or astrophysical problems. For instance, I am focusing on a hidden non-Abelian gauge theory with the complex scalars charged under hidden gauge symmetry. Interestingly, the hidden complex scalars can account for dark matter and the hidden gauge bosons in this model can relax the recent issue of the measurements of the Hubble parameter.

今後の研究の推進方策

For my future research plan, I will continue my study on the dark matter models in the hidden sector. In particular, I am interested in the hidden photon dark matter, which can be produced by the quantum fluctuations during the inflationary epoch. The mass of the hidden photon dark matter is predicted to be larger than the micro electron volt due to the constraints from the CMB observations.
It is possible that the mass of the hidden photon dark matter in a wider range by alternative mechanisms. For example, it can be produced thermally during a phase transition in the early universe and contributes to the correct relic abundance. In this direction, I would like to construct a model including a hidden photon and to check the feasibility of this new mechanism under all of the constraints.

  • 研究成果

    (10件)

すべて 2020 2019

すべて 雑誌論文 (1件) (うち国際共著 1件、 査読あり 1件、 オープンアクセス 1件) 学会発表 (9件) (うち国際学会 8件、 招待講演 2件)

  • [雑誌論文] Hidden Monopole Dark Matter via Axion Portal and its Implications for Direct Detection Searches, Beam-Dump Experiments, and the H0 Tension2020

    • 著者名/発表者名
      Ryuji Daido, Shu-Yu Ho, Fuminobu Takahashi
    • 雑誌名

      Journal of High Energy Physics

      巻: 185 ページ: 1-20

    • DOI

      10.1007/JHEP01(2020)185

    • 査読あり / オープンアクセス / 国際共著
  • [学会発表] Direct Detection of Hidden Monopole Dark Matter via Axion Portal Coupling2020

    • 著者名/発表者名
      Shu-Yu Ho
    • 学会等名
      KEK-PH2020
    • 国際学会
  • [学会発表] Direct Detection of Hidden Monopole Dark Matter via Axion Portal Coupling2020

    • 著者名/発表者名
      Shu-Yu Ho
    • 学会等名
      NCTS Dark Physics Workshop
    • 国際学会 / 招待講演
  • [学会発表] Hidden Monopole Dark Matter via Axion Portal and its Implications for Direct Search and Beam-Dump experiments2019

    • 著者名/発表者名
      Shu-Yu Ho
    • 学会等名
      NCTS Annual Theory Meeting 2019: Particles, Cosmology and Strings
    • 国際学会
  • [学会発表] Hidden Monopole Dark Matter via Axion Portal and its Implications for Direct Search and Beam-Dump experiments2019

    • 著者名/発表者名
      Shu-Yu Ho
    • 学会等名
      Workshop on Long lived particle searches with various signatures (LLP workshop 2019)
    • 招待講演
  • [学会発表] Hidden Monopole Dark Matter via Axion Portal and its Implications for Direct Search and Beam-Dump experiments2019

    • 著者名/発表者名
      Shu-Yu Ho
    • 学会等名
      TAUP 2019
    • 国際学会
  • [学会発表] Hidden Monopole Dark Matter via Axion Portal and its Implications for Direct Search and Beam-Dump experiments2019

    • 著者名/発表者名
      Shu-Yu Ho
    • 学会等名
      COSMO’19
    • 国際学会
  • [学会発表] Hidden Monopole Dark Matter via Axion Portal and its Implications for Direct Search and Beam-Dump experiments2019

    • 著者名/発表者名
      Shu-Yu Ho
    • 学会等名
      25th International Summer Institute on Phenomenology of Elementary Particles and Cosmology (SI2019)
    • 国際学会
  • [学会発表] Hidden Monopole Dark Matter via Axion Portal and its Implications for Direct Search and Beam-Dump experiments2019

    • 著者名/発表者名
      Shu-Yu Ho
    • 学会等名
      25th International Symposium on Particles, Strings, and Cosmology (PASCOS 2019)
    • 国際学会
  • [学会発表] Relaxing the cosmological moduli problem by low scale inflation2019

    • 著者名/発表者名
      Shu-Yu Ho
    • 学会等名
      Resonant instabilities in cosmology and their observational consequences
    • 国際学会

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公開日: 2021-01-27  

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