Papers
S. Ogawa, O. Morikawa, and T. Hirose
"Quasinormal modes and continuum response of de Sitter black holes via complex scaling method"
arXiv:2605.03277 [hep-th]
S. Ogawa, T. Hirose, and O. Morikawa
"Complex scaling approach to quasinormal modes of Schwarzschild and Reissner-Nordström black holes"
arXiv:2604.20442 [hep-th]
K. Ogata and S. Ogawa
"Description of nucleon elastic scattering off 6Li with the four-body continuum-discretized coupled-channels method"
arXiv:2602.15492 [nucl-th]
O. Morikawa, S. Ogawa, and S. Onoda
"Geometric phase of exceptional point as quantum resonance in complex scaling method"
arXiv:2512.24528 [quant-ph] (Phys. Rev. A 113 (2026), 052225)
H. Nakada, S. Ogawa, Y. Chazono, and K. Ogata
"Systematic analysis of proton- and deuteron-induced one-proton knockout reactions"
arXiv:2512.17236 [nucl-th] (accepted for publication in J. Phys. Soc. Jpn.)
O. Morikawa and S. Ogawa
"Exact WKB method for radial Schrödinger equation"
arXiv:2510.11766 [quant-ph] (J. Phys. A: Math. Theor. 59 (2026), 145202)
O. Morikawa and S. Ogawa
"On continuum and resonant spectra from exact WKB analysis"
arXiv:2508.09211 [quant-ph] (J. Phys. A: Math. Theor. 59 (2026), 225306)
O. Morikawa and S. Ogawa
"Unified exact WKB framework for resonance - Zel'dovich/complex-scaling regularization and rigged Hilbert space"
arXiv:2505.02301 [hep-th] (J. High Energy Phys. 10 (2025), 49)
S. Ogawa, T. Fukui, J. Singh, and K. Ogata
"Determination of S18 from 9C breakup reaction within a four-body reaction model"
arXiv:2504.04026 [nucl-th] (accepted for publication in PTEP)
O. Morikawa and S. Ogawa
"Non-perturbative formulation of resonances in quantum mechanics based on exact WKB method"
arXiv:2503.18741[hep-th] (Prog. Theor. Exp. Phys. 2025 (2025), 103B01)
S. Ogawa, K. Yoshida, Y. Chazono, and K. Ogata
"Three-body analysis reveals the significant contribution of minor 5He s-wave component in 6Li(p, 2p)5He cross section"
arXiv:2404.17814 [nucl-th] (Phys. Rev. C 111 (2025), 034622)
S. Ogawa, S. Watanabe, T. Matsumoto, and K. Ogata
"Systematic analysis of t and 3He breakup reactions"
arXiv:2303.10595 [nucl-th] (Phys. Rev. C 108 (2023), 024604)
S. Ogawa and T. Matsumoto
"Dineutron in the 2+_1 state in 6He"
arXiv:2111.04285 [nucl-th] (Phys. Rev. C 105 (2022), L041601)
S. Ogawa, T. Matsumoto, Y. Kanada-En'yo, and K. Ogata
"Investigation of multi-step effects for proton inelastic scattering to the 2+_1 state in 6He"
arXiv:2103.16865 [nucl-th] (Phys. Rev. C 104 (2021), 044608)
S. Ogawa and T. Matsumoto
"Investigation of contributions of the 2+_2 resonance in 6He via analysis of the 6He(p, p′) reaction"
arXiv:2003.05123 [nucl-th] (Phys. Rev. C 102 (2020), 021602(R))
S. Ogawa, R. Horinouchi, M. Toyokawa, and T. Matsumoto
"Microscopic optical potentials including breakup effects for elastic scattering"
arXiv:1804.00416 [nucl-th] (Prog. Theor. Exp. Phys. 2019 (2019), 123D04)
Papers with Experimental Collaborations
R. Tsuji et al.,
"First observation of mirror t and 3He clusters in the stable Ca isotopes via quasi-free (p,pt) and (p,p3He) reactions"
accepted for publication in Prog. Theor. Exp. Phys.
CheongSoo Lee et al.,
"Proton-Induced Deuteron Knockout (p,pd) on 12C and 16O at 226 MeV"
Prog. Theor. Exp. Phys. 2026 (2026), 053D01.
R. Matsumura et al.,
"Establishing the 40Ca(p,pα) Reaction at 392 MeV under Quasi-Free Scattering Conditions"
arXiv:2601.17393 [nucl-ex], Prog. Theor. Exp. Phys. 2026 (2026), 043D01.
Proceedings
S. Ogawa and T. Matsumoto
"Study on the 2+_2 Resonance in 6He via Analysis of 6He(p, p') Reactions"
Few Body Syst. 63 (2022), 35
T. Matsumoto and S. Ogawa
"Study of Resonances Via CDCC Analysis with the Complex-Scaling Method"
Few Body Syst. 62 (2021), 113