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Webmaster：Ippei Obata
Affiliation：Institute of Particle and Nuclear Studies, KEK (Tsukuba, Japan)
Research Interest：Parity-violation in cosmology
Research Activities：Publication List
E-mail：iobata_at_post.kek.jp（_at_→@）
News
12 August
invited talk at the conference "VIETNAM COSMOLOGY 2025" (HP) (10-16 August, ICISE, Quy Nhon)
Title:"Cosmic Birefringence and Its Implications for Physics beyond the Standard Model" (Talk Slides)
21 July
Contributed talk at the PASCOS 2025 conference (HP) (21-25 July, Durham University, UK)
Title: "Probing Majoron Dark Matter with Optical Interferometry" (Talk Slides)
10 May
Submitted a paper
"Adjusting optical cavity birefringence with wavelength tunable laser for axion searches" (arXiv)
2 April
Contributed talk at LeCosPA Meets IPMU (HP) (31 March - 2 April)
Title: "Parity Violation Meets Cosmic Birefringence: Implications for fundamental physics" (Talk Slides)
4 March
Contributed talk as a LOC member at YU Workshop 2025 (HP) (4-5 March)
Title: "Axionic defects in the CMB: birefringence and gravitational waves" (Talk Slides)
27 January
invited talk at the conference "CMB B-mode - NEXT" (HP) (27-29 January, KEK)
Title:"Cosmic Birefringence" (Talk Slides)
2 December
Contributed talk at the JGRG 33 (HP) (2-6 December, Kindai University)
Title: "Can gravitational wave detectors meet the Majoron?" (Talk Slides)
21 November
Invited (contribute) talk at the online workshop "Parity Violation from Home" (HP) (19-22 November)
Title: "Parity-violating scalar trispectrum from a rolling axion during inflation" (Talk Slides)
15 November
Paper "Constraining ultralight ALP dark matter in light of cosmic birefringence" is published in PRD (Link)
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