Koichi Hamaguchi

5.5k total citations
102 papers, 3.4k citations indexed

About

Koichi Hamaguchi is a scholar working on Nuclear and High Energy Physics, Astronomy and Astrophysics and Artificial Intelligence. According to data from OpenAlex, Koichi Hamaguchi has authored 102 papers receiving a total of 3.4k indexed citations (citations by other indexed papers that have themselves been cited), including 95 papers in Nuclear and High Energy Physics, 58 papers in Astronomy and Astrophysics and 5 papers in Artificial Intelligence. Recurrent topics in Koichi Hamaguchi's work include Particle physics theoretical and experimental studies (81 papers), Cosmology and Gravitation Theories (57 papers) and Dark Matter and Cosmic Phenomena (56 papers). Koichi Hamaguchi is often cited by papers focused on Particle physics theoretical and experimental studies (81 papers), Cosmology and Gravitation Theories (57 papers) and Dark Matter and Cosmic Phenomena (56 papers). Koichi Hamaguchi collaborates with scholars based in Japan, Germany and Switzerland. Koichi Hamaguchi's co-authors include W. Buchmüller, T. Yanagida, Motoi Endo, Michael Ratz, Tsutomu T. Yanagida, Masaaki Fujii, Oleg Lebedev, T. Asaka, Fuminobu Takahashi and Masahiro Kawasaki and has published in prestigious journals such as Physical Review Letters, Nuclear Physics B and Monthly Notices of the Royal Astronomical Society.

In The Last Decade

Koichi Hamaguchi

100 papers receiving 3.3k citations

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
Koichi Hamaguchi	3.3k	2.3k	126	112	79	102	3.4k
Raphael Flauger	1.2k 0.4×	1.4k 0.6×	117 0.9×	201 1.8×	44 0.6×	32	1.7k
Jihn E. Kim	5.8k 1.8×	3.9k 1.7×	328 2.6×	319 2.8×	65 0.8×	161	6.0k
A. Masiero	6.9k 2.1×	2.1k 0.9×	181 1.4×	221 2.0×	88 1.1×	159	7.0k
Qaisar Shafi	2.9k 0.9×	2.9k 1.3×	76 0.6×	136 1.2×	25 0.3×	108	3.2k
C. P. Burgess	2.0k 0.6×	1.8k 0.8×	223 1.8×	369 3.3×	28 0.4×	64	2.3k
Jisuke Kubo	2.5k 0.7×	926 0.4×	81 0.6×	153 1.4×	24 0.3×	112	2.6k
Jay G. Wacker	2.4k 0.7×	1.5k 0.7×	194 1.5×	121 1.1×	45 0.6×	40	2.5k
T. Asaka	2.9k 0.9×	1.5k 0.7×	46 0.4×	68 0.6×	33 0.4×	51	2.9k
Yasunori Nomura	5.2k 1.6×	3.2k 1.4×	240 1.9×	676 6.0×	56 0.7×	137	5.4k
Matthew Reece	2.4k 0.7×	1.6k 0.7×	183 1.5×	220 2.0×	49 0.6×	60	2.6k

Countries citing papers authored by Koichi Hamaguchi

Since Specialization

Citations

This map shows the geographic impact of Koichi Hamaguchi's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Koichi Hamaguchi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Koichi Hamaguchi more than expected).

Fields of papers citing papers by Koichi Hamaguchi

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Koichi Hamaguchi. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Koichi Hamaguchi. The network helps show where Koichi Hamaguchi may publish in the future.

Co-authorship network of co-authors of Koichi Hamaguchi

This figure shows the co-authorship network connecting the top 25 collaborators of Koichi Hamaguchi. A scholar is included among the top collaborators of Koichi Hamaguchi based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Koichi Hamaguchi. Koichi Hamaguchi is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Hamaguchi, Koichi, et al.. (2025). Affleck-Dine leptoflavorgenesis. Journal of High Energy Physics. 2025(12). 1 indexed citations

Hamaguchi, Koichi, et al.. (2025). Insights on the scale of leptogenesis from neutrino masses and neutrinoless double-beta decay. The European Physical Journal C. 85(7). 2 indexed citations

Hamaguchi, Koichi, Natsumi Nagata, & Jiaming Zheng. (2025). Axion emission from proton Cooper pairs in neutron stars. Journal of Cosmology and Astroparticle Physics. 2025(6). 38–38. 1 indexed citations

Hamaguchi, Koichi, et al.. (2024). Vortex creep heating in neutron stars. Journal of Cosmology and Astroparticle Physics. 2024(3). 51–51. 6 indexed citations

Hamaguchi, Koichi, et al.. (2023). Minimal Nambu-Goldstone-Higgs model in supersymmetric SU(5) revisited. Physical review. D. 107(3).

Hamaguchi, Koichi, et al.. (2023). Revisiting Affleck-Dine leptogenesis with light sleptons. Journal of Cosmology and Astroparticle Physics. 2023(7). 3–3. 1 indexed citations

Hamaguchi, Koichi, et al.. (2023). Axion quality problem and nonminimal gravitational coupling in the Palatini formulation. Physical review. D. 108(1). 5 indexed citations

Hamaguchi, Koichi, et al.. (2023). Probing new physics in the vector-like lepton model by lepton electric dipole moments. Journal of High Energy Physics. 2023(1). 9 indexed citations

Hamaguchi, Koichi, et al.. (2022). Capture of electroweak multiplet dark matter in neutron stars. Physical review. D. 106(5). 21 indexed citations

10.

Hamaguchi, Koichi, Y. Kanazawa, & Natsumi Nagata. (2022). Axion quality problem alleviated by nonminimal coupling to gravity. Physical review. D. 105(7). 13 indexed citations

11.

Asai, Kento, et al.. (2022). Probing the Lμ−Lτ gauge boson at the MUonE experiment. Physical review. D. 106(5). 11 indexed citations

12.

Endo, Motoi, Koichi Hamaguchi, Sho Iwamoto, & Teppei Kitahara. (2021). Supersymmetric interpretation of the muon g – 2 anomaly. Journal of High Energy Physics. 2021(7). 65 indexed citations

13.

Endo, Motoi, Koichi Hamaguchi, Sho Iwamoto, & Teppei Kitahara. (2020). Muon g − 2 vs LHC Run 2 in supersymmetric models. Journal of High Energy Physics. 2020(4). 18 indexed citations

14.

Asai, S., Koichi Hamaguchi, & Satoshi Shirai. (2009). Stop and Decay of Long-lived Charged Massive Particles at the LHC detectors. arXiv (Cornell University). 8 indexed citations

15.

Asai, S., Koichi Hamaguchi, & Satoshi Shirai. (2009). Measuring Lifetimes of Long-Lived Charged Massive Particles Stopped in LHC Detectors. Physical Review Letters. 103(14). 141803–141803. 28 indexed citations

16.

Buchmüller, W., Koichi Hamaguchi, Oleg Lebedev, & Michael Ratz. (2006). Supersymmetric Standard Model from the Heterotic String. Physical Review Letters. 96(12). 121602–121602. 164 indexed citations

17.

Buchmüller, W., Koichi Hamaguchi, Oleg Lebedev, & Michael Ratz. (2005). Local grand unification. CERN Bulletin. 143–156. 1 indexed citations

18.

Fujii, Masaaki & Koichi Hamaguchi. (2001). Higgsino and Wino Dark Matter from Q-ball Decay. arXiv (Cornell University). 8 indexed citations

19.

Fujii, Masaaki, Koichi Hamaguchi, & T. Yanagida. (2001). Affleck-Dine baryogenesis and leptogenesis with a gaugedU(1)B−L. Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields. 64(12). 19 indexed citations

20.

Asaka, T., Koichi Hamaguchi, Masahiro Kawasaki, & T. Yanagida. (1999). Leptogenesis in inflaton decay. Physics Letters B. 464(1-2). 12–18. 174 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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