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Article type: Cover
2002 Volume 104 Issue 6 Pages
Cover1-
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Article type: Appendix
2002 Volume 104 Issue 6 Pages
App1-
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Article type: Appendix
2002 Volume 104 Issue 6 Pages
F1-F2
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TONY GHERGHETTA
Article type: Article
2002 Volume 104 Issue 6 Pages
F3-F10
Published: March 20, 2002
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We study the supersymmetric standard model in a slice of five-dimensional AdS, where supersymmetry is broken by imposing different boundary conditions between the fermions and bosons of bulk superfields. The scale of supersymmetry breaking is exponentially small due to the warp factor of the AdS metric, and is transmitted through the AdS bulk to matter fields confined on the Planck-brane. This leads to a predictable superparticle mass spectrum where the gravitino mass is 10^<-3>eV, and scalar particles receive masses at the one-loop level via bulk gauge interactions. Furthermore, the AdS/CFT correspondence suggests that the 5d warped model is dual to the ordinary 4d MSSM with a strongly coupled CFT sector responsible for the breaking of supersymmetry.
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Takeo Matsuoka
Article type: Article
2002 Volume 104 Issue 6 Pages
F11-F22
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Takuya Morozumi
Article type: Article
2002 Volume 104 Issue 6 Pages
F23-F27
Published: March 20, 2002
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Recent development of CP violation in the seesaw model is discussed. [2] [4] We emphasize a possible relation between CP violation between low energy and leptogenesis.
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Riccardo Barbieri, Lawrence J. Hall, Yasunori Nomura
Article type: Article
2002 Volume 104 Issue 6 Pages
F28-F34
Published: March 20, 2002
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In [1] the one Higgs doublet standard model was obtained by an orbifold projection of a 5D supersymmetric theory in an essentially unique way, resulting in a prediction for the Higgs mass m_H=127±8 GeV and for the compactification scale 1/R=370±70 GeV. The dominant one loop contribution to the Higgs potential was found to be finite, while the above uncertainties arose from quadratically divergent brane Z factors and from other higher loop contributions. In [3], a quadratically divergent Fayet-Iliopoulos term was found at one loop in this theory. We show that the resulting uncertainties in the predictions for the Higgs boson mass and the compactification scale are small, about 25% of the uncertainties quoted above, and hence do not affect the original predictions. However, a tree level brane Fayet-Iliopoulos term could, if large enough, modify these predictions, especially for 1/R.
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David Elazzar Kaplan
Article type: Article
2002 Volume 104 Issue 6 Pages
F35-F51
Published: March 20, 2002
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We discuss a series of models which mediate supersymmetry breaking through a small (L≪TeV^<-1>) extra dimension. We begin with a review of the supersymmetric flavor problem. We then briefly describe anomaly-mediated supersymmetry breaking, gaugino-mediated supersymmetry breaking and gaugino-assisted anomaly mediation and discuss the relevant merits of each. We then describe a specific theory of Scherk-Schwarz supersymmetry breaking and show that it is equivalent to (after a field redefinition) a theory where the radion superfield has a non-zero F term, thus connecting it with theories with spontaneous supersymmetry breaking. Finally we discuss gaugino mediation in the context of a "deconstructed" extra dimension.
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Naoyuki HABA
Article type: Article
2002 Volume 104 Issue 6 Pages
F52-F55
Published: March 20, 2002
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Teruyuki Kitabayashi, Masaki Yasue
Article type: Article
2002 Volume 104 Issue 6 Pages
F56-F64
Published: March 20, 2002
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We show that the large solar neutrino mixing characterized by sin^2 2θ_<12> 〜 0.8 is accommodated in an extended Zee model with a triplet Higgs scalar (s) as well as the standard Higgs scalar (φ), its copy (φ') and a singly charged scalar (h^+). The model offers two global symmetries associated with the numbers of φ and φ', N_<φ,φ'>, where N_φ+N_<φ'> coincides with the hypercharge while N_φ-N_φ'(≡X) is a new conserved charge, which is identical to L_e-L_μ-L_γ for the left-handed leptons. Neutrino masses are radiatively generated by h^+ with X=0 for ν_e-ν_μ and ν_e-ν_γ mixings responsible for solar neutrino masses and also supplied by s with X=2 at the tree-level for mass terms of ν_iν_j (i, j-μ, γ) responsible for atmospheric neutrino masses. Similarly, charged lepton masses are generated by φ with X=1 for e-μ, and e-γ mixings and by φ' with X=-1 for mass terms of μ and γ. The rotation effects on neutrino masses due to the e-μ, and e-γ mixings, which are converted into the electron mass, are crucial for the large solar neutrino mixing.
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Toshihiko Ota, Joe Sato, Yoshitaka Kuno
Article type: Article
2002 Volume 104 Issue 6 Pages
F65-F66
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Haruhiko Terao
Article type: Article
2002 Volume 104 Issue 6 Pages
F67-F92
Published: March 20, 2002
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First we give a review of the spurion formalism and the exact renormalization group equations for soft supersymmetry breaking parameters in general gauge theories. Next we discuss the minimal supersymmetric standard model coupled to superconformal theories leading to hierarchical Yukawa couplings by large anomalous dimensions of quarks and leptons. The soft scalar masses are found to satisfy the nobel sum rule in IR regime. It is possible construct the models such that the degenerate squark/slepton masses are realized thanks to this IR sum rule. However, it is found also that this denegeneracy is slightly broken mainly by the radiative corrections of the SM gaugino mass insertion. We show that the degeneracy is sufficient for the squark sector, but weak for the slepton sector to avoid the supersymmetric flavor problems.
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JISUKE KUBO
Article type: Article
2002 Volume 104 Issue 6 Pages
F93-F96
Published: March 20, 2002
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Hiroaki NAKANO
Article type: Article
2002 Volume 104 Issue 6 Pages
F97-F111
Published: March 20, 2002
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We propose a new solution to supersymmetric flavor problem, based on supersymmetric models coupled to superconformal field theories (SCFT's); it simultaneously leads to hierarchical Yukawa couplings and sfermion mass degeneracy. The hierarchical structure for 'messenger' couplings between the SM and SC sectors is generated by Froggatt-Nielsen mechanism without generating D-term contribution to squark and slepton masses. Interestingly, this hierarchy is inversely transferred to the Yukawa couplings in the SM sector. We extend the previous analysis to the case with flavor mixing. In this class of models, flavor-independent structure of the superconformal fixed point guarantees that the sfermion masses of the first and the second generations are completely degenerate at low energy.
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[in Japanese]
Article type: Article
2002 Volume 104 Issue 6 Pages
F112-F116
Published: March 20, 2002
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Nobuhiro Maekawa
Article type: Article
2002 Volume 104 Issue 6 Pages
F117-F133
Published: March 20, 2002
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In this talk1, we propose a GUT scenario in which doublet-triplet splitting is naturally realized in SO (10) unification using the Dimopoulos-Wilczek mechanism [4] and the realistic mass matrices of quarks and leptons are obtained in a simple way. For the neutrino sector, bi-maximal neutrino mixing angles are realized. Moreover, the generic interaction is allowed, namely, all the terms which are allowed by the symmetry are included in the scenario. Therefore, once we fix the integer number charges of the anomalous U(1)_A symmetry, which plays an essential role in the scenario, all the scales, GUT breaking scale, mass scales of superheavy particles, are determined. The scenario can be extended into EQ unification, in which a condition for suppression of flavor changing neutral current (FCNC) is automatically satisfied.
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Masaaki Fujii
Article type: Article
2002 Volume 104 Issue 6 Pages
F134-F138
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Article type: Index
2002 Volume 104 Issue 6 Pages
165-166
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Article type: Index
2002 Volume 104 Issue 6 Pages
166-
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Article type: Index
2002 Volume 104 Issue 6 Pages
166-
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Article type: Appendix
2002 Volume 104 Issue 6 Pages
App2-
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Article type: Appendix
2002 Volume 104 Issue 6 Pages
App3-
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Article type: Cover
2002 Volume 104 Issue 6 Pages
Cover2-
Published: March 20, 2002
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Article type: Cover
2002 Volume 104 Issue 6 Pages
Cover3-
Published: March 20, 2002
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