Research Achievements

■ Publications (Peer-reviewed)

1. Study of magnetic environment for neutron spin filters using polarized 3He at J-PARC and JRR-3
S. Takada, ... Y. Goto (3rd/14) | JPS Conf. Proc.2023 ISSE Proceedings 41, 011005 (2023) link

2. New muonic He atom HFS measurements at J-PARC MUSE
Y. Goto, et.al. | Springer Nature Proc. HYPERFINE2023 Proceedings 245 article 75 (2024) link

3. Dual-mode rectangular microwave cavity for precision spectroscopy of hyperfine structure in muonium
R. Iwai, ... Y. Goto (4th/11) | NIM-A 169434 (2024) link

4. Precision muonium spectroscopy
R. Iwai, ... Y. Goto (5th/14) | Muon4future Proceedings 452, 0007 (2024) link

5. Present status of spectroscopy of the hyperfine structure and repolarization of muonic helium atoms at J-PARC
S. Fukumura, ... Y. Goto (4th/16) | FFK2023 Proceedings 6, 877 (2024) link

6. Muonic helium hyperfine structure measurements at J-PARC MUSE
P. Strasser, …Y. Goto (3rd/16) | EXA-LEAP 2024 Proceedings (2025) link

7. Precision measurements of muonium and muonic helium hyperfine structure at J-PARC
P. Strasser, ... Y. Goto (6th/21) | Eur. Phys. J. D 79:20 (2025) link

8. New Muonic Helium HFS Measurements at J-PARC MUSE and Research to Improve Precision
Y. Goto, et.al. | Proc. J-PARC Symposium 2024 (No.JPARC2024-163) (accepted for publication)

■ International Conferences (Invited)

1. Current status of precise measurement of muonium hyperfine structure in high magnetic field at J-PARC MUSE INVITED
Y. Goto | FFK2025, May 28, 2025, Kraków, Poland link

2. Toward high-precision spectroscopy of muonium hyperfine structure at J-PARC with high magnetic field INVITED
Y. Goto | SSP2025, Sep 25, 2025, Osaka, Japan link

■ International Conferences (Oral presentations)

1. New muonic He atom HFS measurements at J-PARC MUSE
Y. Goto, et.al. | HYPERFINE2023, Nov 2023, Nara, Japan (O-18)

2. New muonic He atom HFS measurements at J-PARC MUSE
Y. Goto, et.al. | APS DNP and JPS Fall Meeting, Dec 2023, Waikoloa, USA (D14-00004)

3. Results to date of the MuSEUM project and preparations for the high field experiment
Y. Goto, et.al. | Cross calibration collaboration meeting, Nov 2024, KEK Tokai

4. Muonium HFS
Y. Goto | Nagoya Univ. g-2 collaboration meeting, Dec 2024, Online

5. Towards High Field Measurement of Muonium HFS (I)
Y. Goto (on behalf of MuSEUM group) | 30th g-2 collaboration meeting, Jun 25, 2025, KEK Tokai

■ Domestic Conferences (Oral presentations)

1. J-PARC MLFにおける偏極スピンフィルター開発の概要と現状
後藤優 | 原子核三者若手夏の学校, Aug 2022, Online

2. 中性子偏極のための3Heスピンフィルター偏極装置の開発
後藤優、他 | 日本物理学会2023年春季大会, Mar 2023, Online (23aK1-12)

3. 複合核共鳴における時間反転対称性の破れ探索に向けた中性子偏極子: 3Heスピンフィルターの開発
後藤優、他 | 中性子物理研究会, May 2023, Nagoya University

4. ミュオニックヘリウム超微細構造の精密測定
後藤優、他 | 中間子科学研究会, Jul 2023, KEK東海キャンパス

5. Development of a laser system for the 3He spin filter to polarize neutron beam
Y. Goto | KMI flash, Oct 2023, Nagoya University

6. 139Laを用いた複合核共鳴反応におけるパリティ非保存量の終状態依存性の測定
後藤優、他 | 日本物理学会2024年春季大会, Mar 2024, Online (19aV1-6)

7. ミュオニックヘリウム超微細構造の精密測定
後藤優、他 | 中性子物理研究会, May 2024, Nagoya University

8. 高磁場環境下におけるミュオニウム超微細構造の精密測定に向けて
後藤優、他 | s型研究会(中性子ミュオン合同研究会), Dec 2024, Nagoya University

9. ミュオニウム超微細構造精密測定にむけた現状
後藤優、他 | 日本物理学会2025年春季大会, Mar 2025, Online (18aT1-9)

10. MuSEUM・MuHe
後藤優 | 中性子物理研究会, May 2025, Nagoya University

11. 高磁場環境下におけるミュオニウム超微細構造の精密測定に向けて
後藤優 | 中性子ミューオン合同研究会, Dec 2025, Online

■ Poster Presentations

1. 139Laを用いた複合核共鳴反応におけるパリティ非保存量の測定
後藤優、他 | 量子ビームサイエンスフェスタ, Mar 2024, 水戸市民会館 (No.190Q)

2. New Muonic Helium HFS Measurements at J-PARC MUSE and Research to Improve Precision
Y. Goto, et.al. | J-PARC Symposium, Mar 2024, 水戸市民会館 (P-116)

3. Study of Hybrid-SEOP for Negative Muon Repolarization in Muonic Helium
Y. Goto, et.al. | KEKスチューデント・デイ2024, Mar 2024, KEKつくばキャンパス

4. Muonic Helium Hyperfine Structure Measurement at J-PARC MUSE
Y. Goto, et.al. | 量子ビームサイエンスフェスタ, Mar 2024, 筑波国際会議場 (No.194Q)

■ Fellowships & Affiliations

1. Special Research Student, JAEA
May 2022 - September 2022

2. Visiting Researcher, KEK
June 2024 - September 2024

3. Visiting Researcher, KEK
February 2025 - March 2025

4. JSPS Research Fellow DC1
April 2025 -