144 research outputs found
Chamseddine, Fr\"ohlich, Grandjean Metric and Localized Higgs Coupling on Noncommutative Geometry
We propose a geometrized Higgs mechanism based on the gravitational sector in
the Connes-Lott formulation of the standard model, which has been constructed
by Chamseddine, Frhlic and Grandjean. The point of our idea is that
Higgs-like couplings depend on the local coordinates of the four-dimensional
continuum,. The localized couplings can be calculated by the Wilson loops
of the gauge field and the connection, which is defined on
.Comment: 22 pages, LaTeX, corrected typos, minor change
Electroweak baryogenesis from chargino transport in the supersymmetric model
We study the baryon asymmetry of the universe in the supersymmetric standard
model (SSM). At the electroweak phase transition, the fermionic partners of the
charged SU(2) gauge bosons and Higgs bosons are reflected from or transmitted
to the bubble wallof the broken phase. Owing to a physical complex phase in
their mass matrix, these reflections and transmissions have asymmetries between
CP conjugate processes. Equilibrium conditions in the symmetric phaseare then
shifted to favor a non-vanishing value for the baryon number density, which is
realized through electroweak anomaly. We show that the resultant ratio of
baryon number to entropy is consistent with its present observed value within
reasonable ranges of SSM parameters, provided that the CP-violating phase
intrinsic in the SSM is not much suppressed. The compatibility with the
constraints on the parameters from the electric dipole moment of the neutron is
also discussed.Comment: 23 page
Classicalization of Quantum Fluctuation in Inflationary Universe
We discuss the classicalization of a quantum state induced by an environment
in the inflationary stage of the universe. The classicalization is necessary
for the homogeneous ground sate to become classical non-homogeneous one
accompanied with the statistical fluctuation, which is a plausible candidate
for the seeds of structure formation. Using simple models, we show that i) the
two classicalization criteria, the classical correlation and quantum
decoherence, are simultaneously satisfied by the environment and that ii) the
power spectrum of the resultant statistical fluctuation depends upon the detail
of the classicalization process. Especially, the result ii) means that, taking
account of the classicalization process, the inflationary scenario does not
necessarily predict the unique spectrum which is usually believed.Comment: 24 pages, Latex, 2 Postscript figure
Collective motion of micro-organisms from field theoretical viewpoint
We analyze the collective motion of micro-organisms in the fluid and consider the problem of the red tide. The red tide is produced by the condensation of the micro-organisms, which might be a similar phenomenon to the condensation of the strings. We propose a model of the generation of the red tide. By considering the interaction between the micro-organisms mediated by the velocity fields in the fluid, we derive the Van der Waals type equation of state, where the generation of the red tide can be regarded as a phase transition from the gas of micro-organisms to the liquid
Development of displacement- and frequency-noise-free interferometer in 3-D configuration for gravitational wave detection
The displacement- and frequency-noise-free interferometer (DFI) is a multiple
laser interferometer array for gravitational wave detection free from both the
displacement noise of optics and laser frequency noise. So far, partial
experimental demonstrations of DFI have been done in 2-D table top experiments.
In this paper, we report the complete demonstration of a 3-D DFI. The DFI
consists of four Mach-Zehnder interferometers with four mirrors and two
beamsplitters. The displacement noises both of mirrors and beamsplitters were
suppressed by up to 40 dB. The non-vanishing DFI response to a gravitational
wave was successfully confirmed using multiple electro-optic modulators and
computing methods
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