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Volume 102, Issue 4
Displaying 1-41 of 41 articles from this issue
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Article type: Cover
2001 Volume 102 Issue 4 Pages Cover1-
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Article type: Appendix
2001 Volume 102 Issue 4 Pages App1-
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Article type: Appendix
2001 Volume 102 Issue 4 Pages D1-D4
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Mihoko M. NojiriArticle type: Article
2001 Volume 102 Issue 4 Pages D5-D12
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
JOURNAL FREE ACCESSWe show that LHC experiments might well be able to determine all the parameters required for a prediction of the present density of thermal LSP relics from the Big Bang era. If the LSP is an almost pure bino we usually only need to determine its mass and the mass of the SU(2) singlet sleptons. The only requirement to do this is that m_<l^^〜_R> < m_<χ^^〜^0_2>, which is true for most of the cosmologically interesting parameter space. If the LSP has a significant higgsino component, its predicted thermal relic density is smaller than for an equal-mass bino. We show that in this case squark decays also produce significant numbers ofχ^^〜^0_4 andχ^^〜^±_2. Reconstructing the corresponding decay cascades then allows to determine the higgsino component of the LSP.View full abstractDownload PDF (603K) -
S. KasuyaArticle type: Article
2001 Volume 102 Issue 4 Pages D13-D14
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
JOURNAL FREE ACCESSWe show Q-ball formation in the context of gauge- and gravity-mediated SUSY breaking in MSSM. In either case, Q balls can be considered as both the dark matter and the source for the baryon number of the universe simultaneously. We also show the possibility of the detection of stable Q-balls.View full abstractDownload PDF (248K) -
[in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D15-D16
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
JOURNAL FREE ACCESSLate-time reheating process due to the decay of non-relativistic massive particles influences the scenario of the standard cosmology. If the matter-dominated epoch continues so long that the radiation-domination can not be realized completely at a cosmic time t≃1 sec, the universe would fail to produce the light elements. We find that the reheating temperature T_R should be greater than 0.7 MeV in order to agree with observations. If the massive particle has a branch of hadronic decay mode, the reheating temperature should be greater than 3 - 4 MeV, for the hadronic branching ratio B_h = 10^<-2> - 1. It is expected that the future satellite experiments (MAP and PLANCK) to measure anisotropies of cosmic microwave background radiation temperature can detect the vestige of the late-time entropy production as a modification of the effective number of the neutrino species N^<eff>_v.View full abstractDownload PDF (164K) -
M. Kawasaki, Masahide Yamaguchi, T. YanagidaArticle type: Article
2001 Volume 102 Issue 4 Pages D17-D19
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
JOURNAL FREE ACCESSWe propose a chaotic inflation model in supergravity. In the model the Kahler potential has a Nambu-Goldstone-like shift symmetry of the inflaton chiral multiplet which ensures the flatness of the inflaton potential beyond the Planck scale. We show that the chaotic inflation naturally takes place by introducing a small breaking term of the shift symmetry in the superpotential. This may open a new branch of model building for inflationary universe in the framework of supergravity.View full abstractDownload PDF (259K) -
[in Japanese], [in Japanese], [in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D20-D21
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Aiichi IwazakiArticle type: Article
2001 Volume 102 Issue 4 Pages D22-D23
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese], [in Japanese], [in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D24-D25
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese], [in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D26-D27
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D28-D30
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Kazunari SHIMAArticle type: Article
2001 Volume 102 Issue 4 Pages D31-D32
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese], [in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D33-D34
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D35-D36
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese], [in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D37-D38
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese], [in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D39-D40
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D41-D42
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese], [in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D43-D44
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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A. Bartl, K. HidakaArticle type: Article
2001 Volume 102 Issue 4 Pages D45-
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese], [in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D46-D47
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Takuya MorozumiArticle type: Article
2001 Volume 102 Issue 4 Pages D48-D57
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D58-D59
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese], Cai-Dian Lu, Mao-Zhi YangArticle type: Article
2001 Volume 102 Issue 4 Pages D60-D61
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D62-D63
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese], B. GrzadkowskiArticle type: Article
2001 Volume 102 Issue 4 Pages D64-D65
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Y. SuminoArticle type: Article
2001 Volume 102 Issue 4 Pages D66-D67
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
JOURNAL FREE ACCESSWe report our theoretical study on how to probe the anomalous CP-violating couplings of the top quark in the tt^^- region at future e^+e^- linear colliders. We focus on the unique role of the tt^^- threshold region.View full abstractDownload PDF (150K) -
T. NakayaArticle type: Article
2001 Volume 102 Issue 4 Pages D68-D77
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
JOURNAL FREE ACCESSIn this paper, we present a recent result from K2K neutrino oscillation experiment and a proposal of a future long baseline neutrino oscillation experiment in Japan. In K2K, we observed 27 neutrino events in the 22.5 kton fiducial volume of the Super-Kamiokande (SK) detector, while the expected number is estimated to be 40.3^<+4.7>_<-4.6> in the case of no oscillation. K2K will run in anather few years and will accumurate about 200 expected events. A new long baseline neutrino oscillation experiment is proposed in Japan with the new JHF accelaratror and with the SK detector. The experiment is sensitive to the oscillation parameters: Δm^2_<23> with an accuracy of 2×10^<-4> (eV/c)^2, sin^2 2θ_<μ→X> with an accuracy of 〜 0.01, and sin^2 2θ_<μ→e> below 1% in five years.View full abstractDownload PDF (668K) -
Toshihiko OtaArticle type: Article
2001 Volume 102 Issue 4 Pages D78-D79
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D80-D81
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese], [in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages D82-D85
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
JOURNAL FREE ACCESSThe quark mixing matrix V_<CKM> is studied in depth on the basis of superstring inspired SU(6)×SU(2)_R model with global flavor symmetries. The sizable mixings between right-handed down-type quark D^c and colored Higgs field g^c potentially occur but no such mixings in up-type quark sector. In the model the hierarchical pattern of V_<CKM> is understood systematically. It is shown that due to large D^c-g^c mixings V_<ub> is naturally suppressed compared to V_<td>. It is pointed out that the observed suppression of V_<ub> is in favor of the presence of SU(2)_R gauge symmetry but not in accord with generic SU(5) GUT.View full abstractDownload PDF (315K) -
N. Haba, Y. Matsui, N. OkamuraArticle type: Article
2001 Volume 102 Issue 4 Pages D86-D88
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Ambar GhosalArticle type: Article
2001 Volume 102 Issue 4 Pages D89-D92
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
JOURNAL FREE ACCESSWe propose a texture of three generation Majorana-type neutrino mass matrix in terms of only two parameters which gives rise to nearly bi-maximal mixing angles. We also demonstrate an explicit realization of such type of neutrino mass-matrix in the context of an SU(2)_L×U(1)_Y model due to higher dimensional mass terms through the inclusion of discrete Z_3×Z_4 symmetry and two extra singlet Higgs fields.View full abstractDownload PDF (252K) -
Seungwon BAEK, Toru GOTO, Yasuhiro OKADA, Ken-ichi OKUMURAArticle type: Article
2001 Volume 102 Issue 4 Pages D93-D94
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages 23-29
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages 30-42
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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[in Japanese]Article type: Article
2001 Volume 102 Issue 4 Pages 43-44
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Article type: Appendix
2001 Volume 102 Issue 4 Pages App2-
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Article type: Appendix
2001 Volume 102 Issue 4 Pages App3-
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Article type: Cover
2001 Volume 102 Issue 4 Pages Cover2-
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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Article type: Cover
2001 Volume 102 Issue 4 Pages Cover3-
Published: January 20, 2001
Released on J-STAGE: October 02, 2017
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