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Article type: Cover
2004 Volume 109 Issue 1 Pages
Cover1-
Published: April 20, 2004
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Article type: Appendix
2004 Volume 109 Issue 1 Pages
App1-
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Article type: Appendix
2004 Volume 109 Issue 1 Pages
A1-A2
Published: April 20, 2004
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Naoshi Sugiyama
Article type: Article
2004 Volume 109 Issue 1 Pages
A3-A14
Published: April 20, 2004
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Temperature anisotropies of cosmic microwave background are widely used to extract all sorts of information of cosmology. We present how the temperature anisotropies possibly constrain numbers of light particles and time variation of fundamental constants, such as the gravitational constant and the fine scale structure constant. Then we review recent results of WMAP.
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Thomas Appelquist, Robert Shrock
Article type: Article
2004 Volume 109 Issue 1 Pages
A15-A18
Published: April 20, 2004
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We address the problem of accounting for light neutrino masses in theories with dynamical electroweak symmetry breaking. We discuss this in the context of a class of (extended) technicolor (ETC) models and analyze the full set of Dirac and Majorana masses that arise in such theories. As a possible solution, we propose a combination of suppressed Dirac masses and a seesaw involving dynamically generated |ΔL| = 2 condensates of standard-model singlet, ETC-nonsinglet fermions. We show how this can be realized in an explicit ETC model. An important feature of this proposal is that, because of the suppression of Dirac neutrino mass terms, a seesaw yielding realistic neutrino masses does not require superheavy Majorana masses; indeed, these Majorana masses are typically much smaller than the largest ETC scale.
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A. D. Dolgov
Article type: Article
2004 Volume 109 Issue 1 Pages
A19-A21
Published: April 20, 2004
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The problem of creation of magnetic fields at astronomically large distances is discussed. Several possible mechanisms are briefly described. A recent suggestion that large scale cosmic magnetic fields could be generated in the primeval plasma slightly before hydrogen recombination is discussed in more detail.
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M. Hirsch
Article type: Article
2004 Volume 109 Issue 1 Pages
A22-A24
Published: April 20, 2004
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Supersymmetry with broken R-parity can explain the neutrino mass squared differences and mixing angles observed in neutrino oscillation experiments. If R-parity is broken only by bilinear terms certain decay properties of the lightest supersymmetric particle (LSP) can be predicted from neutrino physics, independent of which SUSY particle is the LSP. Thus bilinear R-parity breaking as the source of neutrino masses will be testable at future colliders.
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Kiwoon Choi, Ian-Woo Kim
Article type: Article
2004 Volume 109 Issue 1 Pages
A25-A34
Published: April 20, 2004
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We discuss the gauge coupling renormalization in orbifold field theories in which the 4-dimensional graviton and/or matter fields are quasi-localized in extra dimension to generate hierarchically different mass scales and/or Yukawa couplings. In such theories, there can be large calculable Kaluza-Klein threshold corrections to low energy gauge couplings, enhanced by the logarithms of small warp factor and/or of small Yukawa couplings. We present the results on those Kaluza-Klein threshold corrections in generic 5-dimensional theory on S^1/Z_2 × Z_2 containing arbitrary 5-dimensional gauge, spinor and scalar fields.
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Naoyuki Haba
Article type: Article
2004 Volume 109 Issue 1 Pages
A35-A36
Published: April 20, 2004
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Hiroyuki Abe
Article type: Article
2004 Volume 109 Issue 1 Pages
A37-A38
Published: April 20, 2004
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Satoru Kaneko
Article type: Article
2004 Volume 109 Issue 1 Pages
A39-A41
Published: April 20, 2004
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N. Okamura
Article type: Article
2004 Volume 109 Issue 1 Pages
A42-A43
Published: April 20, 2004
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In this talk, I show one possibility to solve the degeneracies in the neutrino oscillation parameters with a neutrino factory and a large water-Cerenkov detector. We assume that a neutrino factory at J-PARC (Japan Proton Accelerator Research Complex) delivers 10^<21> decaying unpolarized μ^± at 10 GeV a year and a 100 kton-level water-Cerenkov detector, at distance of 2100 km away from the J-PARC, can measure the event energy and distingish e^± and μ^±, but not their charge. After 1 year operation for each μ^±, decay, we expect to obtain the following results; (i) we can discriminate the degeneracy of U^2_<μ3> between 0.4 and 0.6 when U_<e3> is larger than 7.1 × 10^<-2>, (ii) mass hierarchy can be determined for U_<e3> ≳3.2 × 10^<-2>, (iii) δ_<MNS> = 90°, 270° can be distinguished from the CP-conserving cases δ_<MNS> = 0°, 180° and both CP-conserving cases are apart from the each other, when U_<e3> ≳ 5-0 × 10^<-2>.
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Jisuke Kubo
Article type: Article
2004 Volume 109 Issue 1 Pages
A44-A45
Published: April 20, 2004
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Q. Shafi, V. N. Senoguz
Article type: Article
2004 Volume 109 Issue 1 Pages
A46-A55
Published: April 20, 2004
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We reconsider supersymmetric hybrid inflation in which inflation is associated with the breaking of a gauge symmetry G to H, with the symmetry breaking scale M 〜 10^<16> GeV. The models discussed feature a spectral index n_5 = 0.97 - 1.00 while dn_5/dln k ≲ 10^<-3> and the tensor to scalar ratio r ≲ 10^<-4>. If G corresponds to SO(10) or one of its rank five subgroups, the observed baryon asymmetry is naturally explained via leptogenesis.
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K. Ogure
Article type: Article
2004 Volume 109 Issue 1 Pages
A56-A58
Published: April 20, 2004
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We propose a two-zero-texture general Zee model, compatible with the LMA-MSW solution. The washing out of baryon number does not occur in this model for an adequate parameter range. We check the consistency of a model with the constraints coming from flavor changing neutral current processes and the neutrinoless double-beta decay.
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Nobuhiro Maekawa, Toshifumi Yamashita
Article type: Article
2004 Volume 109 Issue 1 Pages
A59-A60
Published: April 20, 2004
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We review the present status of the sliding singlet mechanism which can solve the doublet-triplet (DT) splitting problem dynamically. This attractive mechanism has been generalized to apply it to many unified scenarios. This research attempts to build various concrete E_6 unified models by using the generalized sliding singlet mechanism. As an example, we construct a simple E6 unification model with an anomalous U(1) gauge symmetry in which the DT splitting is realized through this mechanism with the Dimopoulos-Wilczek (DW) type of vacuum expectation value (VEV) of an adjoint Higgs.
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Masaru Fukunaga
Article type: Article
2004 Volume 109 Issue 1 Pages
A61-A62
Published: April 20, 2004
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Takeshi Kurimoto
Article type: Article
2004 Volume 109 Issue 1 Pages
A63-A64
Published: April 20, 2004
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Y. Y. Keum, A. I. Sanda, Mika Matsumori
Article type: Article
2004 Volume 109 Issue 1 Pages
A65-A66
Published: April 20, 2004
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Satoshi Mishima
Article type: Article
2004 Volume 109 Issue 1 Pages
A67-A68
Published: April 20, 2004
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We study effects of MSSM contributions on B → φK decays using PQCD approach. In the case of the LR insertion, we find that the direct CP asymmetries can reach about 85% and the indirect CP asymmetry can reach about -30%.
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Sechul Oh
Article type: Article
2004 Volume 109 Issue 1 Pages
A69-A71
Published: April 20, 2004
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In the framework of R-parity violating supersymmetry, we present a consistent explanation for both recently measured CP asymmetry in B^0 → φK_s decay and the large branching ratio of B^± → η'K^± decay, which are (possibly) inconsistent with the Standard Model prediction.
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M. N. Chernodub, Katsuya Ishiguro, Tsuneo Suzuki
Article type: Article
2004 Volume 109 Issue 1 Pages
A72-A74
Published: April 20, 2004
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We study the action of the lattice monopoles in quenched SU(2) QCD in the Maximal Abelian projection. We relate the lattice action of the monopole currents to the monopole degrees of freedom of the continuum dual superconductor model and obtain the value of the monopole condensate.
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J. Noaki
Article type: Article
2004 Volume 109 Issue 1 Pages
A75-A77
Published: April 20, 2004
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We give a progress report of our lattice calculation of direct and indirect CP violation in kaon decays, parametrized as ⋵'/⋵ and B_k, which require non-perturbative calculation of the matrix elements of the Standard Model effective Hamiltonian.
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V. I. ZAKHAOV
Article type: Article
2004 Volume 109 Issue 1 Pages
A78-A87
Published: April 20, 2004
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We review some difficulties of the standard picture of confining fields which are viewed usually as 'mild', or quasiclassical non-Abelian field configurations. The paradoxes are naturally resolved by recent lattice observations of self-tuned fluctuations which exhibit both ultraviolet and infrared scales. The ultraviolet scale is provided by the lattice spacing a and is manifested in the non-Abelian action density associated with the fluctuations while the physical scale is exhibited by their geometrical characteristics. The data might suggest existence of a dual description of Yang-Mills theories on the fundamental level.
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Article type: Appendix
2004 Volume 109 Issue 1 Pages
App2-
Published: April 20, 2004
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Article type: Appendix
2004 Volume 109 Issue 1 Pages
App3-
Published: April 20, 2004
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Article type: Cover
2004 Volume 109 Issue 1 Pages
Cover2-
Published: April 20, 2004
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Article type: Cover
2004 Volume 109 Issue 1 Pages
Cover3-
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