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Article type: Cover
2006 Volume 112 Issue 5 Pages
Cover1-
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Article type: Appendix
2006 Volume 112 Issue 5 Pages
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Article type: Appendix
2006 Volume 112 Issue 5 Pages
E1-E2
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Haruhiko Terao
Article type: Article
2006 Volume 112 Issue 5 Pages
E3-E5
Published: February 20, 2006
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The Higgs field with a large positive anomalous dimension can eliminate the finetuning problem, however suppresses the top Yukawa coupling unfortunately. In this talk, a phenomenologically viable model with mixing top quarks and the extra fermions in the conformal gauge sector was presented.
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Toshifumi Yamashita
Article type: Article
2006 Volume 112 Issue 5 Pages
E6-E8
Published: February 20, 2006
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We examine the low energy effective theories of Gauge-Higgs unification (GHU) models. We find that the effective theories are described only by the zero-modes, with a particular renormalization condition. We call this condition as "Gauge-Higgs condition". This means that we can describe the low energy theory as the Standard Model (SM) constrained by this condition if a model of the GHU is the UV completion of the SM. This approach will be a powerful tool to investigate the low energy phenomena of GHU models.
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Koji TSUMURA
Article type: Article
2006 Volume 112 Issue 5 Pages
E9-E11
Published: February 20, 2006
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We discuss lepton flavor violation (LFV) associated with tau leptons in the framework of the two-Higgs-doublet model. Current data for rare tau decays provide substantial upper limits on the LFV Yukawa couplings in the large tan β region where tan β is the ratio of vacuum expectation values of the two Higgs doublets. We show that measuring the LFV Higgs boson decays h^0→γ^±^μ^∓ at future colliders can be useful to further constrain the LFV couplings especially in the relatively small tan β region.
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Kazuhiro Tobe
Article type: Article
2006 Volume 112 Issue 5 Pages
E12-E14
Published: February 20, 2006
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We discuss "CP-odd" Higgs production via gluon fusion in the minimal supersymmetric standard model with explicit CP violation in a stop A-term. We show that there is a parameter region in which the production cross section is enhanced by a factor of about 1000, as compared to the case without CP violation in the stop sector. In this region, the stop pair events will be the important signature of the enhanced "CP-odd" Higgs production. Together with searches for electric dipole moments of electron, neutron and mercury, the searches for the enhanced Higgs production could be important to probe an origin of the CP-violation.
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Byungchul Chung
Article type: Article
2006 Volume 112 Issue 5 Pages
E15-E18
Published: February 20, 2006
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We consider a possibility that electroweak symmetry breaking (EWSB) is triggered by both a fundamental Higgs and a composite Higgs arising in a dynamical symmetry breaking mechanism induced by a new strong dynamics.
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Makiko Nagashima
Article type: Article
2006 Volume 112 Issue 5 Pages
E19-E21
Published: February 20, 2006
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Recent direct CP violation results in B<^0(+)>→K^+π^<-(0)> may suggest that Z penguin possesses large weak phases. This can be realized by four generation model. Calling for sizable V^*_<t's>V_<t'b> and near maximal phase, A_<Kπ><0 and the needed A_<Kπ^0>-A_<Kπ> splitting can be explained by means of LO PQCD calculation. Such large effects in b→s transitions would affect s→d transitions as well. Imposing the kaon constraints from ε_K, K^+→π^+νν^^- and ε'/ε, we find V^*_<t'd>V_<t's>〜few×10^<-4> with large phase, and enhancing K_L→π^0νν^^- by an order (even two orders) of magnitude in comparison to the standard model expectation.
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Keiji Igi
Article type: Article
2006 Volume 112 Issue 5 Pages
E22-E24
Published: February 20, 2006
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Jisuke Kubo
Article type: Article
2006 Volume 112 Issue 5 Pages
E25-E27
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Extra dimension deconstructed on a closed chain has naturally the symmetry of a regular polygon, the dihedral symmetry D_N. We assume that the fields are irreducible representations of the binary dihedral group Q_<2N>, which is the covering group of D_N. It is found that although the orbifold boundary conditions break the dihedral invariance explicitly, the Q_<2N> symmetry appears as an intact, internal global flavor symmetry at low energies.
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Simon Catterall
Article type: Article
2006 Volume 112 Issue 5 Pages
E28-E39
Published: February 20, 2006
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We describe a new approach to the problem of putting supersymmetric theories on the lattice. The basic idea is to discretize a twisted formulation of the supersymmetric theory. For certain theories with extended supersymmetry these twisted formulations contain only integer spin fields. The twisting exposes a scalar nilpotent supercharge which generates an exact lattice symmetry. We gives examples from quantum mechanics, sigma models and Yang-Mills theories.
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Issaku KANAMORI
Article type: Article
2006 Volume 112 Issue 5 Pages
E40-E42
Published: February 20, 2006
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We formulate two-dimensional N=2 super Yang-Mills model on lattice. In our formulation, we assign supercharges on links and keep the invariance for all four charges. We also use the topological twist which is essentially related to the Dirac-Kahler fermion.
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Tomohisa Takimi, Tetsuya Onogi
Article type: Article
2006 Volume 112 Issue 5 Pages
E43-E44
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S. Su
Article type: Article
2006 Volume 112 Issue 5 Pages
E45-E55
Published: February 20, 2006
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The origin of the dark matter is one of the most pressing questions in particle physics and cosmology. In this lecture, we review two dark matter scenarios: weakly interacting massive particle (WIMP) and super-weakly interacting massive particle (superWIMP). In the WIMP case, we discuss the direct and indirect dark matter detections and the synergy between particle physics and cosmology. In superWIMP case, we discuss the gravitino dark matter and the related particle phenomenology.
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Akira Yotsuyanagi
Article type: Article
2006 Volume 112 Issue 5 Pages
E56-E58
Published: February 20, 2006
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We consider the gravitino problem and derive the constraint on the reheating temperature after inflation.
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Hiroyuki Abe, Yutaka Sakamura
Article type: Article
2006 Volume 112 Issue 5 Pages
E59-E61
Published: February 20, 2006
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We construct an effective N=1 superfield description of five-dimensional conformal supergravity. By the use of this description, we reinterpret some physical systems such as Scherk-Schwarz supersymmetry breaking from the conformal supergravity viewpoint. We also show how to introduce a radion fluctuation mode in this framework.
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Shiro Hirai
Article type: Article
2006 Volume 112 Issue 5 Pages
E62-
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Atsushi Watanabe
Article type: Article
2006 Volume 112 Issue 5 Pages
E63-E64
Published: February 20, 2006
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Kazuo Fujikawa
Article type: Article
2006 Volume 112 Issue 5 Pages
E65-E75
Published: February 20, 2006
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The analysis of geometric phases is briefly reviewed by emphasizing various gauge symmetries involved. The analysis of geometric phases associated with level crossing is reduced to the familiar diagonalization of the Hamiltonian in the second quantized formulation. A hidden local gauge symmetry becomes explicit in this formulation and specifies physical observables; the choice of a basis set which specifies the coordinates in the functional space is arbitrary in the second quantization, and a sub-class of coordinate transformations, which keeps the form of the action invariant, is recognized as the gauge symmetry. It is shown that the hidden local symmetry provides a basic concept which replaces the notions of parallel transport and holonomy. We also point out that our hidden local gauge symmetry is quite different from a gauge symmetry used by Aharonov and Anandan in their definition of non-adiabatic phases.
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Kiwoon Choi
Article type: Article
2006 Volume 112 Issue 5 Pages
E76-E84
Published: February 20, 2006
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In string compactification preserving N=1 SUSY, moduli fields (including the string dilaton) are plausible candidates for the messenger of SUSY breaking at low energy scales. In a scenario that moduli-mediated SUSY breaking is significant, the pattern of soft SUSY breaking terms depends crucially on how the light moduli with mass m≲O(8π^2m_<3/2>) are stabilized. We discuss the correspondence between the pattern of soft terms and the stabilization mechanism of light moduli within the framework of 4D effective supergravity which is generalized to include a SUSY-breaking uplifting potential which might be necessary to get the phenomenologically viable de-Sitter (or Minkowski) vacuum. In some case, light moduli can be stabilized by controllably small perturbative corrections to the Kahler potential, yielding the soft terms dominated by the moduli-mediated contribution. In more generic situation, light moduli are stabilized by non-perturbative effects encoded in the superpotential and a quite different pattern of soft terms emerges: the anomaly-mediated soft terms become comparable to the moduli-mediated ones. Such mixed moduli-anomaly mediated soft terms can be described by a mirage messgenger scale hierarchically lower than M_<Planck>, and lead to low energy superparticle masses qualitatively different from those of other mediation models such as mSUGRA scenario, gauge-mediation, and anomaly-mediation.
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Article type: Appendix
2006 Volume 112 Issue 5 Pages
E85-E86
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Article type: Appendix
2006 Volume 112 Issue 5 Pages
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Article type: Appendix
2006 Volume 112 Issue 5 Pages
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Article type: Appendix
2006 Volume 112 Issue 5 Pages
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Article type: Cover
2006 Volume 112 Issue 5 Pages
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Article type: Cover
2006 Volume 112 Issue 5 Pages
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