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NSR database version of April 11, 2024.

Search: Author = T.Motoba

Found 97 matches.

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2021FU12      Few-Body Systems 62, 47 (2021), Erratum Few-Body Systems 62, 69 (2021)

H.Fujioka, S.Ajimura, T.Fukuda, T.Gogami, E.Hiyama, Y.Morino, T.Motoba, T.Nagae, S.Nagao, A.Sakaue, T.Takahashi, Y.Taki, A.O.Tokiyasu, M.Uchida, M.Yosoi

Search for the Lightest Double-Λ Hypernucleus, 5ΛΛH, at J-PARC

NUCLEAR REACTIONS 7Li(K-, K+)7H, E not given; analyzed available data. 5H; deduced future hypernuclei discovery of 5H theoretically expected to be the lightest bound state.

doi: 10.1007/s00601-021-01635-y
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2020IS02      Phys.Rev. C 101, 024301 (2020)

M.Isaka, Y.Yamamoto, T.Motoba

Low-lying level structure of Λ hypernuclei and spin dependence of the ΛN interaction with antisymmetrized molecular dynamics

NUCLEAR STRUCTURE 6,8Li, 8,9Be, 9,10B, 12,13C, 14N, 15O; calculated levels, J, π of core nuclei of hypernuclei. 4He, 7,9Li, 9,10Be, 10,11B, 12,13C, 15N, 16O; calculated levels, J, π, binding energies, spin-spin and spin-orbit splittings of the p-shell hypernuclei within the framework of Hyper-antisymmetrized molecular dynamics (HyperAMD) with the ΛN G-matrix interaction derived from the baryon-baryon interaction, extended soft core (ESC) model. Comparison with experimental data.

doi: 10.1103/PhysRevC.101.024301
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2019KA31      Prog.Theor.Exp.Phys. 2019, 073D01 (2019)

Y.Kanada-En'yo, M.Isaka, T.Motoba

Energy spectra in p-shell Λ hypernuclei and 19ΛF and spin-dependent ΛN interactions

NUCLEAR STRUCTURE 19F; analyzed available data; calculated hypernuclei energies, J, π.

doi: 10.1093/ptep/ptz054
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2018IT08      Prog.Theor.Exp.Phys. 2018, 113D01 (2018)

K.Itonaga, T.Motoba, T.A.Rijken

Hypernuclear non-mesonic weak decays in the extended meson exchange model

NUCLEAR STRUCTURE 4H, 4,5He, 7Li, 9Be, 11B, 12,13C, 15N, 16O, 27Al, 28Si, 56Fe, 89Y, 139La, 209Bi; analyzed available data; deduced calculated decay rates, resonance parameter widths, intrinsic asymmetry parameter medium-to-heavy hypernuclei.

doi: 10.1093/ptep/pty110
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2018ME04      Phys.Rev. C 97, 064318 (2018)

H.Mei, K.Hagino, J.M.Yao, T.Motoba

Disappearance of nuclear deformation in hypernuclei: A perspective from a beyond-mean-field study

NUCLEAR STRUCTURE 30,31Si; calculated projected energy curves, J, π, potential energy curves, low-lying positive-parity states, and B(E2) for 31S hypernucleus and 30Si core nucleus. Microscopic particle-rotor model. Discussed role of beyond-mean-field effects on deformation of 31Si hypernucleus. Comparison with experimental data for 30Si.

doi: 10.1103/PhysRevC.97.064318
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2017ME07      Phys.Rev. C 96, 014308 (2017)

H.Mei, K.Hagino, J.M.Yao, T.Motoba

Transition from vibrational to rotational character in low-lying states of hypernuclei

NUCLEAR STRUCTURE 144,146,148,150,152,154Sm; calculated total energy in the mean-field approximation as a function of quadrupole deformation, yrast levels, E(first 4+)/E(first 2+) using multireference covariant density functional theory (MR-CDFT), and compared with experimental data. 145,147,149,151,153,155Sm; calculated levels, J, π, B(E2) of hypernuclei, probability of the dominant components of configurations using microscopic particle-core coupling scheme based on the covariant density functional theory.

doi: 10.1103/PhysRevC.96.014308
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2016ME09      Phys.Rev. C 93, 044307 (2016)

H.Mei, K.Hagino, J.M.Yao, T.Motoba

Low-energy hypernuclear spectra within a microscopic particle-rotor model with a relativistic point-coupling hyperon-nucleon interaction

NUCLEAR STRUCTURE 13C; calculated levels, J, π, B(E2), Λ binding energy, energy splittings of hypernucleus with and without the scaled NΛ interaction using microscopic particle-rotor model with relativistic point-coupling hyperon-nucleon interactions PCY-S1, PCY-S2, PCY-S3, PCY-S4 and LO. Contour plots for the difference between the theoretical and the experimental hyperon binding energies as function of coupling strength parameters. Analyzed effect of tensor coupling strength. Comparison of level spectrum with experimental data.

doi: 10.1103/PhysRevC.93.044307
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2016UM02      Nucl.Phys. A954, 242 (2016)

A.Umeya, T.Motoba

Theoretical study of structure and production of 19ΛF as a gateway to sd-shell hypernuclei

NUCLEAR STRUCTURE 18,19F, 19F Λ hypernucleus; calculated levels, J, π, spectroscopic factors of neutron pickup from 19F gs using multi-configuration shell model with and without removing spurious CM (Center-of-Mass) excitation effect. 18F, 19F Λ hypernucleus; calculated γ transitions B(E1), B(M1), B(E2). Spectroscopic factors, γ transition strengths, levels compared to data.

NUCLEAR REACTIONS 19F(K-, π-), E at 0.3-1.8 GeV/c; calculated 19F Λ hypernuclear production σ, σ(θ), σ(θ, E) to low-lying states, Λ polarization vs kaon momentum using microscopic DWIA and assuming K-+n to Λ+π- as the main process.

doi: 10.1016/j.nuclphysa.2016.05.001
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2015HI04      Phys.Rev. C 91, 054316 (2015)

E.Hiyama, M.Isaka, M.Kamimura, T.Myo, T.Motoba

Resonant states of the neutron-rich Λ hypernucleus 7ΛHe

NUCLEAR STRUCTURE 6He; calculated levels, J, π, widths. 7He; calculated levels, J, π, widths of hypernucleus in the framework of α+Λ+n+n four-body cluster model. Comparison with experimental data.

doi: 10.1103/PhysRevC.91.054316
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2015ME04      Phys.Rev. C 91, 064305 (2015)

H.Mei, K.Hagino, J.M.Yao, T.Motoba

Microscopic study of low-lying spectra of Λ hypernuclei based on a beyond-mean-field approach with a covariant energy density functional

NUCLEAR STRUCTURE 12,13C, 20,21Ne, 154,155Sm; calculated levels, J, π, B(E2), potential energy surfaces as function of deformation parameter β, wave function amplitudes, configuration of 13C, 21Ne, 155Sm hypernuclei, and 12C, 20Ne, 154Sm core nuclei. Spin-orbit splitting. Microscopic particle-rotor model (MPRM) based on a covariant energy density functional theory, and coupled-channel equations. Comparison with experimental data, and with other theoretical calculations.

doi: 10.1103/PhysRevC.91.064305
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2014ME16      Phys.Rev. C 90, 064302 (2014)

H.Mei, K.Hagino, J.M.Yao, T.Motoba

Microscopic particle-rotor model for the low-lying spectrum of Λ hypernuclei

NUCLEAR STRUCTURE 9Be; calculated levels, J, π, B(E2) for the 9Be hypernucleus by coupling the hyperon to low-lying states of the core nucleus 8Be. Particle-rotor model with a meanfield approach and generator coordinate method (GCM). Comparison with experimental results.

doi: 10.1103/PhysRevC.90.064302
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2013MO24      Nucl.Phys. A914, 23c (2013)

T.Motoba

Structure and production of medium-mass hypernuclei

NUCLEAR REACTIONS 19F, 28Si, 40Ca, 52Cr(γ, Κ+), E=1.3 GeV; calculated Λ hypernuclei σ, σ(θ, E) using DWIA. Compared to data.

NUCLEAR STRUCTURE 18,19O, 18,19F; calculated 18O, 18F levels, J, π, isospin; 19O, 19F Λ hypernuclei levels, J, π, isospin.

doi: 10.1016/j.nuclphysa.2013.01.084
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2012BY02      Nucl.Phys. A881, 199 (2012)

P.Bydzovsky, M.Sotona, T.Motoba, K.Itonaga, K.Ogawa, O.Hashimoto

Electromagnetic production of medium-mass Λ-hypernuclei

NUCLEAR REACTIONS 1H(γ, K+)Λ, E=0.9-2.2 GeV;1H(γ, K+)Λ, E(cm)=0.9-2.5 GeV; measured reaction products; deduced σ(θ); calculated σ(θ) using different models. 28Si(γ, K+)28λAl, E=1.3 GeV;40Ca(γ, K+)40ΛK, E=1.3 GeV;52Cr(γ, K+)52Λ, E=1.3 GeV; measured reaction products; deduced DDHF hypernucleus levels, J, π, configuration, σ(θ), spectroscopic factor; calculated levels, J, π, configuration, σ(θ), spectroscopic factor using DWIA, PWIA, other models.

doi: 10.1016/j.nuclphysa.2012.01.023
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2010FU13      Int.J.Mod.Phys. E19, 2480 (2010)

Y.Fujii, A.Chiba, D.Doi, T.Gogami, O.Hashimoto, H.Kanda, M.Kaneta, D.Kawama, K.Maeda, T.Maruta, A.Matsumura, S.Nagao, S.N.Nakamura, A.Shichijo, H.Tamura, N.Taniya, T.Yamamoto, K.Yokota, S.Kato, Y.Sato, T.Takahashi, H.Noumi, T.Motoba, E.Hiyama, I.Albayrak, O.Ates, C.Chen, M.Christy, C.Keppel, M.Kohl, Y.Li, A.Liyanage, L.Tang, T.Walton, Z.Ye, L.Yuan, L.Zhu, P.Baturin, W.Boeglin, S.Dhamija, P.Markowitz, B.Raue, J.Reinhold, Ed.V.Hungerford, R.Ent, H.Fenker, D.Gaskell, T.Horn, M.Jones, G.Smith, W.Vulcan, S.A.Wood, C.Johnston, N.Simicevic, S.Wells, C.Samanta, B.Hu, J.Shen, W.Wang, X.Zhang, Y.Zhang, J.Feng, Y.Fu, J.Zhou, S.Zhou, Y.Jiang, H.Lu, X.Yan, Y.Ye, L.Gan, A.Ahmidouch, S.Danagoulian, A.Gasparian, M.Elaasar, F.R.Wesselmann, A.Asaturyan, A.Margaryan, A.Mkrtchyan, H.Mkrtchyan, V.Tadevosyan, D.Androic, M.Furic, T.Petkovic, T.Seva, G.Niculescu, I.Niculescu, V.M.Rodriguez Lopez, E.Cisbani, F.Cusanno, F.Garibaldi, G.M.Uuciuoli, R.De Leo, S.Maronne

Hypernuclear spectroscopy with electron beam at JLab HALL C

NUCLEAR REACTIONS 7Li, 12C, 28Si(E, EK+)7He/12B/28Al, E=1.2 GeV; measured reaction products; deduced hypernuclear spectroscopy, missing mass spectrum.

doi: 10.1142/S0218301310016983
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2010HI01      Phys.Rev.Lett. 104, 212502 (2010)

E.Hiyama, M.Kamimura, Y.Yamamoto, T.Motoba

Five-Body Cluster Structure of the Double-Λ Hypernucleus 11ΛΛBe

NUCLEAR STRUCTURE 11Be; calculated energy levels of double hypernucleus; deduced observation of the ground state of 11ΛΛBe in KEK-E373 experiment.

doi: 10.1103/PhysRevLett.104.212502
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2010HI06      Prog.Theor.Phys.(Kyoto), Suppl. 185, 1 (2010)

E.Hiyama, T.Motoba, T.A.Rijken, Y.Yamamoto

Baryon-Baryon Interactions and Hypernuclei

doi: 10.1143/PTPS.185.1
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2010HI07      Prog.Theor.Phys.(Kyoto), Suppl. 185, 106 (2010)

E.Hiyama, M.Kamimura, Y.Yamamoto, T.Motoba, T.A.Rijken

S = -1 Hypernuclear Structure

NUCLEAR STRUCTURE 4H, 4,6,7He, 7Li, 7,9Be, 12,13C; calculated hypernucleus excitation energies, splittings, n-p relative and probability densities, B(E2). Comparison with experimental data.

doi: 10.1143/PTPS.185.106
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2010HI08      Prog.Theor.Phys.(Kyoto), Suppl. 185, 152 (2010)

E.Hiyama, M.Kamimura, Y.Yamamoto, T.Motoba, T.A.Rijken

S = -2 Hypernuclear Structure

NUCLEAR STRUCTURE 5,7H, 7He, 7,8,9,10Li, 9,10,11,12Be; calculated double hypernucleus energy levels and ground state J, π, rms radii, density distribution, binding energies. Cluster model and the Gaussian Expansion Method (GEM).

doi: 10.1143/PTPS.185.152
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2010IT03      Prog.Theor.Phys.(Kyoto), Suppl. 185, 252 (2010)

K.Itonaga, T.Motoba

Hypernuclear Weak Decays

RADIOACTIVITY 7,8Li, 8,9Be, 10,11B, 12,13C, 14,15N(π-); calculated hypernucleus decay rates, T1/2. Comparison with experimental data.

doi: 10.1143/PTPS.185.252
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2010IT04      Int.J.Mod.Phys. E19, 2579 (2010)

K.Itonaga, T.Motoba, Th.A.Rijken, T.Ueda

Meson exchange model with the axial vector a1-meson exchange and hypernuclear nonmesonic decay asymmetries

NUCLEAR STRUCTURE 5He, 7Li, 9Be, 10,11B, 12,13C, 16O; calculated asymmetry parameters for s- and p-shell hypernuclei.

doi: 10.1142/S0218301310017113
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2010MO24      Prog.Theor.Phys.(Kyoto), Suppl. 185, 197 (2010)

T.Motoba, K.Itonaga, Y.Yamamoto

+, K+) Reaction Spectroscopy of Heavy Hypernuclei

NUCLEAR REACTIONS 12C, 56Fe, 89Y, 139La(π+, K+), E<30 MeV; calculated hypernucleus production σ(θ), strength functions, excitation spectra, J, π, energy spacings. DWIA analysis.

doi: 10.1143/PTPS.185.197
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2010MO25      Prog.Theor.Phys.(Kyoto), Suppl. 185, 224 (2010)

T.Motoba, P.Bydzovsky, M.Sotona, K.Itonaga

Spectroscopy of Electro- and Photo-Productions of Hypernuclei

NUCLEAR REACTIONS 9Be, 10B, 12C, 19F, 28Si, 40Ca(π+, K+), (π-, K-), (γ, K+), E<2.5 GeV; calculated hypernucleus production σ(θ), s(θ, E), hyperon recoil, excitation energy. Comparison with experimental data.

doi: 10.1143/PTPS.185.224
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2010MO33      Nucl.Phys. A835, 223c (2010)

T.Motoba, S.Sugimoto

Structure and production of p-shell Ξ -hypernuclei

NUCLEAR STRUCTURE 12Be; calculated hypernucleus levels, J, π using different YN interactions.

NUCLEAR REACTIONS 12C(K-, K+), E at 1.7 GeV/c; calculated σ(E, θ) using DWIA.

doi: 10.1016/j.nuclphysa.2010.01.241
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2010MO34      Int.J.Mod.Phys. E19, 2470 (2010)

T.Motoba, P.Bydzovsky, M.Sotona, K.Itonaga, K.Ogawa, O.Hashimoto

Spectroscopy of Medium-mass hypernuclear production

NUCLEAR REACTIONS 12C, 28Si, 40Ca(γ, K+)12B/28Al/40K, E=1.3 GeV; calculated excitation spectra, photoproduction differential σ, hyperon recoil momentum.

doi: 10.1142/S0218301310016971
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2010YA18      Prog.Theor.Phys.(Kyoto), Suppl. 185, 72 (2010)

Y.Yamamoto, T.Motoba, T.A.Rijken

G-Matrix Approach to Hyperon-Nucleus Systems

NUCLEAR STRUCTURE 11B, 12C, 16O, 28Si, 40Ca, 90Zr; calculated hypernucleus single-particle energies, conversion widths, Coulomb force contribution. ESC08 interaction model, comparison with experimental data.

doi: 10.1143/PTPS.185.72
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2009HI12      Phys.Rev. C 80, 054321 (2009)

E.Hiyama, Y.Yamamoto, T.Motoba, M.Kamimura

Structure of A=7 iso-triplet Λ hypernuclei studied with the four-body cluster model

NUCLEAR STRUCTURE 6He, 6Li, 6Be, 7He, 7Li, 7Be; calculated levels, J, π, total interaction energies, and density distributions of hypernuclei using four-body cluster model.

doi: 10.1103/PhysRevC.80.054321
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2009MO40      Nucl.Phys. A827, 318c (2009)

T.Motoba, S.Sugimoto, E.Hiyama, Y.Yamamoto, Th.A.Rijken, M.Kamimura

Structure and production of p-shell Ξ-hypernuclei predicted with realistic interactions

doi: 10.1016/j.nuclphysa.2009.05.065
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2008HI16      Phys.Rev. C 78, 054316 (2008)

E.Hiyama, Y.Yamamoto, T.Motoba, Th.A.Rijken, M.Kamimura

Light Ξ hypernuclei in four-body cluster models

NUCLEAR STRUCTURE 5,7H, 9,10Li, 12Be; calculated level energies, density distributions, binding energies, rms radii. Gaussian expansion method. Hypernuclei.

doi: 10.1103/PhysRevC.78.054316
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2008IT02      Phys.Rev. C 77, 044605 (2008)

K.Itonaga, T.Motoba, T.Ueda, Th.A.Rijken

Role of the axial vector a1-meson exchange in hypernuclear nonmesonic weak decays

NUCLEAR STRUCTURE 5He, 11B, 12C; calculated decay rates, neutron/proton width ratios, asymmetry parameters of hypernuclei. Comparison with experimental data.

doi: 10.1103/PhysRevC.77.044605
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2008MO06      Nucl.Phys. A804, 99 (2008)

T.Motoba, D.E.Lanskoy, D.J.Millener, Y.Yamamoto

Λ spin-orbit splitting in heavy hypernuclei as deduced from DWIA analyses of the 89Y(π+, K+)89ΛY reaction

NUCLEAR REACTIONS 89Y(π+, K+), E at 1.05 GeV/c; calculated hypernuclei production σ(θ) and excitation spectra using DWIA. 89Y deduced hypernuclei levels, J, π.

doi: 10.1016/j.nuclphysa.2008.01.026
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2007HI09      Nucl.Phys. A790, 646c (2007)

E.Hiyama, Y.Yamamoto, Th.A.Rijken, T.Motoba

Few-body aspects of hypernuclear physics

NUCLEAR STRUCTURE 7Li; calculated hypernucleus level energies, J, π. Spin-dependent ΛN interaction features. Four-body model.

doi: 10.1016/j.nuclphysa.2007.03.110
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2006HI11      Phys.Rev. C 74, 054312 (2006)

E.Hiyama, Y.Yamamoto, Th.A.Rijken, T.Motoba

Four-body structure of 7ΛLi and Λn spin-dependent interaction

NUCLEAR STRUCTURE 7Li; calculated hypernucleus level energies, spin-dependent ΛN interaction features. Four-body model.

doi: 10.1103/PhysRevC.74.054312
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2005HI13      Nucl.Phys. A754, 103c (2005)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Three- and four-body structure of light double Λ hypernuclei

NUCLEAR STRUCTURE 6,7He, 7,8,9Li, 9,10Be; calculated two-Λ hypernucleus levels, J, π. Four-body model.

doi: 10.1016/j.nuclphysa.2004.12.075
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2004HI09      Nucl.Phys. A737, 138 (2004)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Few-body aspects of light hypernuclei

NUCLEAR STRUCTURE 8Be; calculated level energies. 4,6,7He, 7,8,9Li, 9,10Be, 13C; calculated energy levels, J, π for single and double Λ hypernuclei.

doi: 10.1016/S0375-9474(04)00307-0
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2004HI11      Nucl.Phys. A738, 175 (2004)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Clustering aspects of light hypernuclei

NUCLEAR STRUCTURE 7He, 7,8,9Li, 9,10Be; calculated double-Λ hypernuclei energy levels. Gaussian expansion method.

doi: 10.1016/j.nuclphysa.2004.04.028
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2003HI24      Mod.Phys.Lett. A 18, 95 (2003)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Few-body aspects of hypernuclear physics

NUCLEAR STRUCTURE 4H, 4,7He, 7,8,9Li, 9,10Be; calculated Λ and ΛΛ hypernucleus level energies, J, π.

doi: 10.1142/S021773230301003X
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2003IT13      Mod.Phys.Lett. A 18, 135 (2003)

K.Itonaga, T.Motoba, T.Ueda

Nonmesonic weak decays of single-Λ and double-Λ hypernuclei of light mass systems

NUCLEAR STRUCTURE 4H, 4,5,6He, 10Be; calculated nonmesonic decay rates for one- and two-Λ hypernuclei. Meson-exchange potential model.

doi: 10.1142/S0217732303010119
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2002HI01      Phys.Rev. C65, 011301 (2002)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Λ-Σ Conversion in Λ4He and Λ4H Based on a Four-Body Calculation

NUCLEAR STRUCTURE 4H, 4He; calculated hypernucleus levels, J, π; deduced role of Λ-Σ conversion. Four-body calculations.

doi: 10.1103/PhysRevC.65.011301
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2002HI15      Phys.Rev. C66, 024007 (2002)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Four-body cluster structure of A=7-10 double-Λ hypernuclei

NUCLEAR STRUCTURE 7He, 7,8,9Li, 9,10Be; calculated double-Λ hypernuclei level energies, J, π. Four-body cluster model.

doi: 10.1103/PhysRevC.66.024007
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2002IT01      Phys.Rev. C65, 034617 (2002)

K.Itonaga, T.Ueda, T.Motoba

Nonmesonic Decays and Lifetimes of Hypernuclei

NUCLEAR STRUCTURE 4H, 4,5He, 11B, 12C, 16O, 28Si, 56Fe, 89Y, 139La, 209Bi; calculated hypernuclear nonmesonic decay rates, T1/2. Comparison with data.

doi: 10.1103/PhysRevC.65.034617
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2001HI05      Nucl.Phys. A684, 227c (2001)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Three- and Four-Body Structure of Light Hypernuclei

doi: 10.1016/S0375-9474(01)00418-3
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2001HI09      Nucl.Phys. A691, 107c (2001)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Three- and Four-Body Structure of Light Λ Hypernuclei

NUCLEAR STRUCTURE 4H, 4He, 7Li, 9Be, 13C; calculated hypernucleus levels, spin-orbit splitting, B(E2), related features.

doi: 10.1016/S0375-9474(01)01015-6
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2001IT07      Nucl.Phys. A691, 197c (2001)

K.Itonaga, T.Ueda, T.Motoba

Weak Decays of Double-Λ Hypernuclei

doi: 10.1016/S0375-9474(01)01030-2
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2001MO34      Nucl.Phys. A691, 213c (2001)

T.Motoba

Production and Decays of S = -2 Hypernuclei with Hyperon-Mixing

doi: 10.1016/S0375-9474(01)01131-9
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2001YA14      Prog.Theor.Phys.(Kyoto) 106, 363 (2001)

Y.Yamamoto, T.Tamagawa, T.Fukuda, T.Motoba

Ξ- Emission Probabilities at (K-, K+) Reaction Points and the ΞN Interaction

NUCLEAR REACTIONS 9Be(K-, K+), E not given; analyzed emission probabilities, related data. 1n, 1H(Ξ-, Ξ-), E at 200-700 MeV/c; calculated σ.

doi: 10.1143/PTP.106.363
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2000HI15      Phys.Rev.Lett. 85, 270 (2000)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

ΛN Spin-Orbit Splittings in Λ9Be and Λ13C Studied with One-Boson-Exchange ΛN Interactions

NUCLEAR STRUCTURE 9Be, 13C; calculated hypernuclei levels, J, π, spin-orbit splitting related features. One-boson exchange models, quark models.

doi: 10.1103/PhysRevLett.85.270
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1999HI02      Phys.Rev. C59, 2351 (1999)

E.Hiyama, M.Kamimura, K.Miyazaki, T.Motoba

γ Transitions in A = 7 Hypernuclei and a Possible Derivation of Hypernuclear Size

NUCLEAR STRUCTURE 7He, 7Li; calculated transitions B(E2), B(M1) in hypernuclei; deduced implications for radius measurement. Three-body model.

NUCLEAR REACTIONS 7Li(π+, K+), E at 1.05 GeV/c; calculated hypernuclear states production σ(E).

doi: 10.1103/PhysRevC.59.2351
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1998AJ01      Phys.Rev.Lett. 80, 3471 (1998)

S.Ajimura, M.Ishikawa, K.Ikeda, T.Kishimoto, A.Okusu, N.Shinkai, Y.Tanaka, H.Ejiri, T.Nakano, T.Nagae, H.Noumi, K.Manabe, M.Sekimoto, T.Shibata, O.Hashimoto, K.Maeda, T.Takahashi, T.Hasegawa, H.Bhang, H.Park, Y.Kim, M.Youn, T.Motoba, K.Itonaga

Polarization of (Λ)5He Produced by the (π+, K+) Reaction

NUCLEAR REACTIONS 6Li(π+, K+), (π+, K+p), E at 1.05 GeV/c; measured excitation energy spectra, asymmetry; deduced 5He hypernucleus formation, polarization.

doi: 10.1103/PhysRevLett.80.3471
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1998HI13      Nucl.Phys. A639, 169c (1998)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Four-Body Calculation of Λ4H and Λ4He with Realistic ΛN Interactions

NUCLEAR STRUCTURE 4H, 4He; calculated hypernuclei binding energieslevels, J, π. Four-body calculations, 3N + Λ model.

doi: 10.1016/S0375-9474(98)00267-X
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1998HI14      Nucl.Phys. A639, 173c (1998)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Four-Body Model Study of Competition between YN Spin-Spin and Spin-Orbit Interactions in Light Hypernuclei

NUCLEAR STRUCTURE 7Li, 13C; calculated hypernuclei levels, J, π; deduced ΛN spin-spin, spin-orbit forces related features.

doi: 10.1016/S0375-9474(98)00268-1
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1998IN01      Nucl.Phys. A633, 312 (1998)

T.Inoue, M.Oka, T.Motoba, K.Itonaga

Non-Mesonic Weak Decays of Light Hypernuclei in the Direct Quark and the One-Pion Exchange Mechanisms

NUCLEAR STRUCTURE 4H, 4,5He; calculated hypernuclei non-mesonic decay rates; deduced contributions from one pion exchange, direct quark mechanisms. Comparison with data.

doi: 10.1016/S0375-9474(98)00005-0
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1998IT02      Nucl.Phys. A639, 329c (1998)

K.Itonaga, T.Ueda, T.Motoba

A-Dependence of Non-Mesonic Decay Rates in the 1π and Correlated 2π Exchange Model

doi: 10.1016/S0375-9474(98)00291-7
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1998MO04      Nucl.Phys. A629, 398c (1998)

T.Motoba

New Aspects of Hypernuclear Structure - Parity-Mixing Intershell Coupling Induced by Λ

NUCLEAR STRUCTURE 12C, 16O; analyzed data; deduced hypernucleus Λ-induced level mixing.

doi: 10.1016/S0375-9474(97)00715-X
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1998MO25      Nucl.Phys. A639, 135c (1998)

T.Motoba

Parity-Mixing Intershell Coupling in Hypernuclei and Properties of ΛN Interactions

NUCLEAR STRUCTURE 12C, 16O; analyzed hypernucleus levels; deduced parity-mixing interactions.

doi: 10.1016/S0375-9474(98)00262-0
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1997DA24      Nucl.Phys. A625, 71 (1997)

R.H.Dalitz, D.H.Davis, T.Motoba, D.N.Tovee

Proton Emitting Λ-Bound States of 16O(Λ)(*)

NUCLEAR REACTIONS 16O(K-, π-p), E at rest; analyzed data; deduced 16O(Λ) hypernuclei intermediate states, J, π, configurations.

doi: 10.1016/S0375-9474(97)00473-9
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1997HI09      Prog.Theor.Phys.(Kyoto) 97, 881 (1997)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Three- and Four-Body Cluster Models of Hypernuclei using the G-Matrix ΛN Interaction (Λ)9Be, (Λ)13C, (Λ)(Λ)6He and (Λ)(Λ)10Be

NUCLEAR STRUCTURE 6He, 9,10Be, 13C; calculated hypernucleus ground, excited states energies. Three-, four-body cluster models, ΛN interaction.

doi: 10.1143/PTP.97.881
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1997YA11      Nucl.Phys. A625, 107 (1997)

Y.Yamamoto, M.Wakai, T.Motoba, T.Fukuda

Production of Double-Λ Hypernuclei at (K-, K+) Reaction Points and Their Pionic Decays

NUCLEAR REACTIONS 9Be, 10,11B, 12C(K-, K+), E not given; calculated single-, double-Λ hyperfragment formation probabilities, pionic decay. Statistical model.

doi: 10.1016/S0375-9474(97)00483-1
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1996HI03      Phys.Rev. C53, 2075 (1996)

E.Hiyama, M.Kamimura, T.Motoba, T.Yamada, Y.Yamamoto

Three-Body Model Study of A = 6-7 Hypernuclei: Halo and skin structures

NUCLEAR STRUCTURE A=6; A=7; calculated hypernuclei states, binding energies. Three-body model.

doi: 10.1103/PhysRevC.53.2075
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1995IT01      Nucl.Phys. A585, 331c (1995)

K.Itonaga, T.Ueda, T.Motoba

A Role of 2π/σ-Exchange in the (Lambda)N → NN Weak Potential and the Nonmesonic Decay of Light (Lambda) Hypernuclei

NUCLEAR STRUCTURE A=4-13; calculated hypernuclei nonmesonic decay rates Γ, Γp, Γn, Γn/Γp.

doi: 10.1016/0375-9474(94)00592-B
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1995MO10      Nucl.Phys. A585, 29c (1995)

T.Motoba, Y.Yamamoto

Comparison of (K-, π) and (π, K+) as a Function of Mass Number

NUCLEAR REACTIONS 10B(π+, K+), E at 1.04 GeV/c; 10B(K-, π-), E at 0.75 GeV/c; calculated σ(θ) vs hypernucleus excitation energy. 16O(K-, π0), E at rest; calculated pion spectrum.

NUCLEAR STRUCTURE A=4; A=7; A=10; A=12; calculated hypernuclei 10B, 12C levels. Different G-matricies.

doi: 10.1016/0375-9474(94)00540-4
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1995TA02      Phys.Rev. C51, 2196 (1995)

M.Takahashi, Y.Yamamoto, T.Motoba, K.Ikeda

Conversion Widths of Ξ Hypernuclear States to Double-Λ States

NUCLEAR REACTIONS 12C, 16O(K-, K+), E at 1.6 GeV/c; calculated partial, total conversion widths of hypernuclear states.

doi: 10.1103/PhysRevC.51.2196
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1995YA05      Nucl.Phys. A585, 371c (1995)

Y.Yamamoto, T.Motoba

Strong Decay of a Ξ-Hypernuclear State

doi: 10.1016/0375-9474(94)00614-S
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1994IK02      Prog.Theor.Phys.(Kyoto) 91, 747 (1994)

K.Ikeda, T.Fukuda, T.Motoba, M.Takahashi, Y.Yamamoto

Formation of a Ξ-Hypernucleus and Transitions to Double-Λ States

NUCLEAR REACTIONS 12C(K-, K+X), E at 1.6 GeV/c; calculated σ(θ, E(X)) for 12B hypernucleus production. DWIA.

doi: 10.1143/ptp/91.4.747
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1994IT01      Phys.Rev. C49, 1045 (1994)

K.Itonaga, T.Motoba, O.Richter, M.Sotona

Hypernuclear and (Lambda)-Spin Polarizations Produced in the (π+, K+) Reaction

NUCLEAR REACTIONS 13,12C, 16O, 10,11B, 14N(π+, K+), E at 1.04 GeV/c; calculated σ(θ), polarization vs excitation energy. DWIA, configuration-mixed wave functions.

doi: 10.1103/PhysRevC.49.1045
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1994IT03      Nucl.Phys. A577, 301c (1994)

K.Itonaga, T.Ueda, T.Motoba

A New (Lambda)N → NN Weak Potential and the Hypernuclear Nonmesonic Decay

NUCLEAR STRUCTURE A=4, 5; calculated hypernuclei nonmesonic decay rates. New N(Lambda)-NN weak potential.

doi: 10.1016/0375-9474(94)90871-0
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1994IT07      Prog.Theor.Phys.(Kyoto), Suppl. 117, 17 (1994)

K.Itonaga, T.Motoba, M.Sotona

The (K-, π-) and (π+, K+) Reaction and Λ-Hypernuclear Polarization

NUCLEAR REACTIONS 1n(π+, X), (K-, X), E at 1-2.4 GeV/c; calculated Λ production σ(θ) vs E. 12C(K-, π-), E at 0.8, 1.1 GeV/c; 12C(π+, K+), E at 1.04, 1.06 GeV/c; 13C(K-, π-), E at 0.8 GeV/c; 13C(π+, K+), E at 1.04, 1.1 GeV/c; 16O(π+, K+), E at 1.04 GeV/c; 16O(K-, π-), E at 1.1 GeV/c; 10B(π+, K+), E at 1.04 GeV/c; calculated σ(θ), Λ hypernuclei production. DWBA, elementary spin-nonflip, spin-flip amplitudes, polarization studies included.

NUCLEAR STRUCTURE A=11; A=12; calculated hypernuclei levels.

doi: 10.1143/PTPS.117.17
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1994MO22      Nucl.Phys. A577, 293c (1994)

T.Motoba, K.Itonaga

(Lambda)-Spin Polarization in Nuclear Medium and Hypernuclear Weak Decay

NUCLEAR REACTIONS 12C(π+, K+), E at 1.04 GeV/c; 12C(π-, K-), E at 1.1 GeV/c; calculated σ(θ) vs excitation, polarizations for lambda hypernuclei. Other reactions discussed.

doi: 10.1016/0375-9474(94)90870-2
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1994MO49      Prog.Theor.Phys.(Kyoto), Suppl. 117, 123 (1994)

T.Motoba, M.Sotona, K.Itonaga

Photoproduction of Polarized Hypernuclei

NUCLEAR REACTIONS 1H(γ, X), E=1-2 GeV; calculated Λ production σ(θ), polarization vs E. 10B, 12C, 16O(γ, K+), E at 1.2 GeV/c; 16O(π+, K+), E at 1.04 GeV/c; calculated σ(θ), polarization for hypernuclei production. Phenomenological elementary process parametrization.

doi: 10.1143/PTPS.117.123
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1994MO50      Prog.Theor.Phys.(Kyoto), Suppl. 117, 477 (1994)

T.Motoba, K.Itonaga

Pi-Mesonic Weak Decay Rates of Light-to-Heavy Hypernuclei

NUCLEAR STRUCTURE A=7-15; calculated π-mesonic decay rates for hypernuclei.

doi: 10.1143/PTPS.117.477
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1994YA19      Prog.Theor.Phys.(Kyoto), Suppl. 117, 65 (1994)

T.Yamada, H.Ohkura, T.Motoba, K.Ikeda

A Review on Highly Excited States of Light Λ-Hypernuclei

NUCLEAR STRUCTURE A=9; A=6; compiled, reviewed, calculated Λ hypernuclei excited states. Cluster model approach.

NUCLEAR REACTIONS 6Li(K-, π-), E at 790 MeV/c; 9Be(K-, π-), E at 720 MeV/c; calculated σ(θ), hypernuclei. 9Be(π+, K+), E at 1.04 GeV/c; calculated hypernuclei production rates. Cluster model approach.

doi: 10.1143/PTPS.117.65
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1994YA22      Prog.Theor.Phys.(Kyoto), Suppl. 117, 281 (1994)

Y.Yamamoto, T.Motoba, T.Fukuda, M.Takahashi, K.Ikeda

Formation and Transition of Strangeness = -2 Nuclear Systems

NUCLEAR REACTIONS 12C, 16O(K-, K+), E at 1.6 GeV/c; calculated states production σ(θ, E(hyperon)), transition rates, hypernuclei. DWIA.

doi: 10.1143/PTPS.117.281
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1994YA23      Prog.Theor.Phys.(Kyoto), Suppl. 117, 361 (1994)

Y.Yamamoto, T.Motoba, H.Himeno, K.Ikeda, S.Nagata

Hyperon-Nucleon and Hyperon-Hyperon Interactions in Nuclei

NUCLEAR STRUCTURE A=4-12; calculated hypernuclei levels, binding energies. G-matrices from different realistic interactions.

doi: 10.1143/PTPS.117.361
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1993OH04      Prog.Theor.Phys.(Kyoto) 89, 437 (1993)

H.Ohkura, T.Motoba, K.Ikeda

Highly Excited States of 6Li(Lambda) by the Microscopic Cluster Model

NUCLEAR STRUCTURE A=6; calculated levels, 6Li hypernuclei. Microscopic cluster model.

NUCLEAR REACTIONS 6Li(K-, π-), E at 790 MeV/c; calculated σ(θ). Microscopic cluster model, different channels.

doi: 10.1143/ptp/89.2.437
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1992IT02      Nucl.Phys. A547, 57c (1992)

K.Itonaga, T.Motoba, O.Richter, M.Sotona

Hypernuclear and (Lambda)-Spin Polarizations in the (π+, K+) and (K-, π-) Reactions

NUCLEAR REACTIONS 12C(π+, K+), E at 1.04 GeV/c; 12C(K-, π-), E at 1.1 GeV/c; calculated σ(θ), hypernuclei, lambda-spin polarizations, proton asymmetry.

doi: 10.1016/0375-9474(92)90709-S
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1992MO27      Czech.J.Phys. B42, 1143 (1992)

T.Motoba, K.Itonaga

Hypernuclear Production Induced by In-Flight K and π

NUCLEAR REACTIONS 56Fe(K-, π-), E at 720 MeV/c; 56Fe, 208Pb(π+, K+), E at 1040 MeV/c; 12C(K-, π-), E at 800 MeV/c; 12C, 28Si(K-, π-), E at 0.7-1.5 GeV/c; 40Ca, 28Si(K-, K+), E at 1.6 GeV/c; 12C(K-, π-), E at 800 MeV/c; 90Zr, 56Fe, 28Si(π+, K+), E at 1040 MeV/c; 89Y(π+, K+), E at 1050 MeV/c; analyzed data; deduced polarized hypernuclei production implications. DWIA.

doi: 10.1007/BF01591399
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1992MO30      Nucl.Phys. A547, 115c (1992)

T.Motoba

Mesonic Weak Decays of (Lambda)- and (Lambda)(Lambda)-Hypernuclei

NUCLEAR STRUCTURE A ≤ 40; calculated π0--decay ratios for hypernuclear isotopes. A=30-210; calculated π to lambda decay rate ratio. A=4, 5, 6; calculated particle spectra for hypernuclei decay.

doi: 10.1016/0375-9474(92)90717-X
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1992SO23      Nucl.Phys. A547, 63c (1992)

M.Sotona, K.Itonaga, T.Motoba, O.Richter, J.Zofka

Production of Polarized Hypernuclei - Photoproduction versus (π, K) and (K, π) Reactions -

NUCLEAR REACTIONS 16O(π+, K+), E at 0.72-1.2 GeV/c; calculated σ(θ), hypernuclear, lambda-spin polarizations. 12C, 16O(γ, K+), E at 1.2 GeV/c; calculated σ(θ), hypernuclear polarization.

doi: 10.1016/0375-9474(92)90710-2
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1992YA10      Czech.J.Phys. B42, 1249 (1992)

Y.Yamamoto, A.Reuber, H.Himeno, S.Nagata, T.Motoba

Hypernuclear Properties Derived from the Julich Hyperon-Nucleon Interaction (in Comparison with the Nijmegen Interactions)

NUCLEAR STRUCTURE 16O, 28Si, 40Ca, 51V, 89Y; calculated (lambda) binding energies. Density-dependent Hartree-Fock calculations.

doi: 10.1007/BF01591404
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1991MO14      Nucl.Phys. A527, 485c (1991)

T.Motoba

Pionic Decays of Light to Heavy Hypernuclei

NUCLEAR STRUCTURE A=5, 6; calculated hypernuclei pionic decay rates.

doi: 10.1016/0375-9474(91)90144-U
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1991MO19      Nucl.Phys. A534, 597 (1991)

T.Motoba, H.Bando, T.Fukuda, J.Zofka

Continuum Pion Spectra in the Weak Decays of 4H(Lambda), 5He(Lambda) and 6He(Lambda)(Lambda)

NUCLEAR STRUCTURE A=4, 5, 6; calculated pionic decay strength function. Kapur-Peierls treatment of continuum, decay rates.

doi: 10.1016/0375-9474(91)90463-G
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1990IT02      Prog.Theor.Phys.(Kyoto) 84, 291 (1990)

K.Itonaga, T.Motoba, H.Bando

p-Shell Hypernuclei via (K-, π-), (π+, K+) and (Stopped K-, π-) Reactions - A Systematic Calculation with Configuration Mixing -

NUCLEAR REACTIONS 14N, 13,12C(K-, π-), E at 800 MeV/c; 12C(π+, K+), E at 1040 MeV/c; calculated σ(θ); 15N, 10B(K-, π-), E at 800 MeV/c; 15N(π+, K+), E at 1040 MeV/c; 15N(K-, π-), E at rest; calculated relative excitation strength vs hypernucleus excitation. Configuration mixed shell model, DWIA.

doi: 10.1143/ptp/84.2.291
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1989BA06      Phys.Rev. C39, 587 (1989)

H.Bando, T.Motoba, M.Sotona, J.Zofka

Polarization of Hypernuclei in the (π+, K+) Reaction

NUCLEAR REACTIONS 12C, 16O, 28Si, 56Fe(π+, K+), E at 1.04 GeV/c; calculated σ(θ), hypernuclear state polarization.

doi: 10.1103/PhysRevC.39.587
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1989MO17      Nuovo Cim. 102A, 345 (1989)

T.Motoba

The (π, K+) Hypernuclear Production and Hypernuclear Structure

NUCLEAR REACTIONS 208Pb, 139La, 90Zr, 56Fe, 40Ca, 28Si, 16O, 12C(π+, K+), E at 1040 MeV/c; calculated σ(θ), hypernuclear production.

doi: 10.1007/BF02735117
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1988BA24      Z.Phys. A330, 203 (1988)

H.Bando, T.Motoba, J.Zofka

Σ-Hypernuclear (π-, K+) Production

NUCLEAR REACTIONS 56Fe, 28Si(π-, K+), E at 1-2 GeV/c; calculated σ(θ).


1988IT02      Z.Phys. A330, 209 (1988)

K.Itonaga, T.Motoba, H.Bando

Pi-Mesonic Decay of Hypernuclei and Pion Wavefunction

NUCLEAR REACTIONS 12C, 16O(π+, π+), E=20, 30, 40 MeV; 12C, 16O(π-, π-), E=30 MeV; calculated σ(θ).


1988MA58      Z.Phys. A331, 89 (1988)

R.Mach, J.Zofka, K.Itonaga, T.Motoba, H.Bando

Pions in Nuclear Interior - Sensitive Test by Hypernuclear Decay


1988MO23      Phys.Rev. C38, 1322 (1988)

T.Motoba, H.Bando, R.Wunsch, J.Zofka

Hypernuclear Production by the (π+, K+) Reaction

NUCLEAR REACTIONS 12C, 16O, 28Si, 40Ca, 56Fe, 90Zr, 208Pb(π+, K+), E at 1040 MeV/c; calculated σ(θ), strength function; deduced effects of resonance and quasifree processes. Kapur-Peierls method, continuum shell model, DWIA analyses.

doi: 10.1103/PhysRevC.38.1322
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1988YA09      Phys.Rev. C38, 854 (1988)

T.Yamada, K.Ikeda, H.Bando, T.Motoba

Cluster Model Theory of the (Lambda)9Be Hypernucleus

NUCLEAR REACTIONS 9Be(K-, π-), E at 720 MeV/c; 9Be(K-, π-), E at rest; 9Be(π+, K+), E at 1040 MeV/c; calculated reaction σ.

doi: 10.1103/PhysRevC.38.854
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1986BA81      Prog.Theor.Phys.(Kyoto) 76, 1321 (1986)

H.Bando, T.Motoba

Production of Hypernuclear States by the (π+, K+) Reaction

NUCLEAR REACTIONS 12C, 56Fe, 208Pb(π+, K+), E at 720, 1040 MeV/c; calculated σ(θ), excitation spectra. DWIA.

doi: 10.1143/PTP.76.1321
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1986YA02      Phys.Lett. 172B, 149 (1986)

T.Yamada, K.Ikeda, H.Bando, T.Motoba

The 9Be(K-, π-)9Be(Lambda) Hypernuclear Production Reaction with Coupled-Channel Cluster Wave Functions

NUCLEAR REACTIONS 9Be(K-, π-), E at 790 MeV/c; calculated reaction strength function vs E; deduced hypernucleus levels.

doi: 10.1016/0370-2693(86)90825-7
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1985BA02      Phys.Rev. C31, 265 (1985)

H.Bando, T.Motoba, Y.Yamamoto

Narrow Widths of (Lambda) Single Particle States in Hypernuclei

NUCLEAR REACTIONS 40Ca(K-, π-), E at rest; analyzed data; deduced hypernuclear state widths.

doi: 10.1103/PhysRevC.31.265
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1985YA05      Prog.Theor.Phys.(Kyoto) 73, 397 (1985)

T.Yamada, K.Ikeda, H.Bando, T.Motoba

Particle Widths of Excited States in 9Be Hypernucleus

NUCLEAR REACTIONS 9Be(K-, π-), E at 790 MeV/c; calculated excitation function; deduced hypernucleus states, Γ.

doi: 10.1143/PTP.73.397
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1984MO09      Prog.Theor.Phys.(Kyoto) 71, 222 (1984)

T.Motoba, H.Bando, K.Ikeda

(K-, π-) Reaction Cross Sections with Microscopic Cluster-Model Wave Functions for Light p-Shell Hypernuclei

NUCLEAR REACTIONS 9Be(K-, π-), E at 720 MeV/c; calculated σ(θ); deduced hypernuclear level excitation possibility. DWIA, cluster model wave functions.

doi: 10.1143/PTP.71.222
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1981BA31      Prog.Theor.Phys.(Kyoto) 65, 919 (1981)

H.Bando, T.Motoba, K.Suzuki

Four Particle-Two Hole Correlations and the Effective Interaction Two-Level Model for Mass-42 Nuclei

NUCLEAR STRUCTURE A=42; calculated levels. Multiple scattering formalism, four particle-two hole correlations, effective interactions.

doi: 10.1143/PTP.65.919
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1979MO18      Prog.Theor.Phys.Suppl. No.65, 136 (1979)

T.Motoba, K.Itonaga

Chapter V. Structure of Light fp-Shell Nuclei. Effects of Core-Excitation and α-Clustering Correlation

NUCLEAR STRUCTURE 42Sc, 44Ti, 44Ca; calculated energy levels, B(E2). Shell-model, core-polarization renormalization, realistic effective interaction, quadrupole-quadrupole term.

doi: 10.1143/PTPS.65.136
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1975MO35      Progr.Theor.Phys. 54, 429 (1975)

T.Motoba

Shell-Model Investigation of Electromagnetic Properties of 57Ni and 55Co

NUCLEAR STRUCTURE 57Ni, 55Co; calculated μ, mixing ratios.

doi: 10.1143/PTP.54.429
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1974MO10      Progr.Theor.Phys. 51, 173 (1974)

T.Motoba, K.Ogawa

Effects of Core-Excitation in 56,57Ni and 55Co

NUCLEAR STRUCTURE 56,57Ni, 55Co; calculated levels, isospin splitting ratios.

doi: 10.1143/PTP.51.173
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