Keywords related to my research are dark matter, inflation, neutrino, supersymmetry, supergravity, etc.

List of publication (past 5 years)

Supersymmetric baryogenesis in a hybrid inflation model

Yoshihiro Gunji (Kanazawa U., Inst. Theor. Phys.), Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.), Takahiro Yoshida (Kaishi Professional U.)

e-Print: 2303.05663 [hep-ph]

DOI: 10.1007/JHEP08(2023)201

Published in: JHEP 08 (2023), 201

Topology-insensitive axion mass in magnetic topological insulators

Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.)

e-Print: 2206.00841 [hep-ph]

DOI: 10.1103/PhysRevB.106.195157 (publication)

Published in: Phys.Rev.B 106 (2022) 19, 195157

Constraining the primordial curvature perturbation using dark matter substructure

Shin'ichiro Ando (U. Amsterdam, GRAPPA and Tokyo U., IPMU), Nagisa Hiroshima (Toyama U. and RIKEN (main)), Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.)

e-Print: 2207.05747 [astro-ph.CO]

DOI: 10.1103/PhysRevD.106.103014 (publication)

Published in: Phys.Rev.D 106 (2022) 10, 103014

Subcritical regime of hybrid inflation with modular A_4 symmetry

Yoshihiro Gunji (Kanazawa U., Inst. Theor. Phys.), Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.), Takahiro Yoshida (Kaishi Professional U. and Niigata U.)

e-Print: 2208.10086 [hep-ph]

DOI: 10.1007/JHEP11(2022)002

Published in: JHEP 11 (2022), 002

Axion-gauge field dynamics with backreaction

Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.), Eiichiro Komatsu (Garching, Max Planck Inst. and Tokyo U., IPMU), Ippei Obata (Garching, Max Planck Inst.)

e-Print: 2111.14429 [hep-ph]

DOI: 10.1088/1475-7516/2022/03/010

Published in: JCAP 03 (2022) 03, 010

Sommerfeld-enhanced dark matter searches with dwarf spheroidal galaxies

Shin'ichiro Ando (U. Amsterdam, GRAPPA and Tokyo U., IPMU), Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.)

e-Print: 2103.01446 [astro-ph.CO]

DOI: 10.1103/PhysRevD.104.023016 (publication)

Published in: Phys.Rev.D 104 (2021) 2, 023016

Axion mass in antiferromagnetic insulators

Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.)

e-Print: 2103.02848 [hep-ph]

DOI: 10.1103/PhysRevD.104.016004 (publication)

Published in: Phys.Rev.D 104 (2021) 1, 016004

Probing heavy dark matter decays with multi-messenger astrophysical data

Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.), Oscar Macias (Tokyo U., IPMU and U. Amsterdam, GRAPPA), Shin'ichiro Ando (U. Amsterdam, GRAPPA and Tokyo U., IPMU), Makoto Arimoto (Kanazawa U.)

e-Print: 1907.11671 [astro-ph.HE]

DOI: 10.1088/1475-7516/2020/01/003 (publication)

Published in: JCAP01(2020)003 , JCAP 01 (2020), 003

Leptogenesis after superconformal subcritical hybrid inflation

Yoshihiro Gunji (Kanazawa U., Inst. Theor. Phys.), Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.)

e-Print: 1906.04530 [hep-ph]

DOI: 10.1007/JHEP09(2019)065

Published in: JHEP 09 (2019), 065, JHEP09(2019)065

Probing pseudo Nambu-Goldstone boson dark matter at loop level

Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.), Takashi Toma (Munich, Tech. U.)

e-Print: 1810.08139 [hep-ph]

DOI: 10.1007/JHEP12(2018)089 (publication)

Published in: JHEP 12 (2018), 089

Superconformal Subcritical Hybrid Inflation

Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.)

e-Print: 1803.08274 [astro-ph.CO]

DOI: 10.1016/j.physletb.2018.05.047

Published in: Phys.Lett.B 782 (2018), 367-371

Longitudinal W boson scattering in a light scalar top scenario

Koji Ishiwata (Kanazawa U., Inst. Theor. Phys.), Yuki Yonekura (Kanazawa U., Inst. Theor. Phys.)

e-Print: 1703.07112 [hep-ph]

DOI: 10.1103/PhysRevD.96.015009

Published in: Phys.Rev.D 96 (2017) 1, 015009

See here (link to INSPIRE HEP) for full list of my works.