2021 Fiscal Year Annual Research Report
Probing Modified Gravity and Non-Abelian Gauge Fields by Gravitational Waves
| Project/Area Number |
19F19313
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| Research Institution | Kyoto University |
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Principal Investigator |
向山 信治 京都大学, 基礎物理学研究所, 教授 (40396809)
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| Co-Investigator(Kenkyū-buntansha) |
GORJI MOHAMMAD ALI 京都大学, 基礎物理学研究所, 外国人特別研究員
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| Project Period (FY) |
2019-11-08 – 2022-03-31
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| Keywords | gravitation / cosmology / gravitatioal waves |
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| Outline of Annual Research Achievements |
Probing dark sector via GWs: We have obtained an analytical expression for the stochastic gravitational wave (GW) spectrum which includes the effects of axions and dark photons. We published the result in Journal of High Energy Physics (JHEP).
Dark photon dark matter: We have shown that dark photons can be produced during inflation and play the role of dark matter later. We published the result in JHEP.
Disformal transformation and Petrov classification: We have shown that while a Petrov type of a solution in scalar-tensor and vector-tensor theories remain unchanged under a conformal transformation, it can change under a disformal transformation. We published the result in Journal of Cosmology and Astroparticle Physics (JCAP).
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| Research Progress Status |
令和3年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和3年度が最終年度であるため、記入しない。
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