107 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
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
Deformation of Schild String
We attempt to construct new superstring actions with a -plet of Majorana
fermions , where is the dimensional space-time
index and is the two dimensional spinor index, by deforming the Schild
action. As a result, we propose three kinds of actions: the first is invariant
under N=1 (the world-sheet) supersymmetry transformation and the
area-preserving diffeomorphism. The second contains the Yukawa type
interaction. The last possesses some non-locality because of bilinear terms of
. The reasons why completing a Schild type superstring action
with is difficult are finally discussed.Comment: 12 pages, Latex, both title and abstract are changed, discussion of
some relations among our results, Nambu-Goto string and super Yang-Mills
theories, added. Results unchange
B -> X_s l+ l- in the vectorlike quark model
We extend the standard model by adding an extra generation of isosinglet up-
and down-type quark pair which engage in weak interactions only via mixing with
the three ordinary quark families. It is shown that the generalized
quark mixing matrix, which is necessarily nonunitary, leads to nonvanishing
flavor changing neutral currents. We then proceed to investigate various
distributions and total branching ratio of the inclusive B -> X_s l+ l- (l
=e,\mu) rare B decays in the context of this model. It is shown that the shapes
of the differential branching ratio and forward-backward asymmetry distribution
are very sensitive to the value of the model parameters which are constrained
by the experimental upper bound on BR(B -> X_s \mu^+ \mu^-). We also indicate
that, for certain values of the dileptonic invariant mass, CP asymmetries up to
10% can be obtained.Comment: 10 pages, 5 figures, Talk given at 23rd Annual MRST
(Montreal-Rochester-Syracuse-Toronto) Conference on High Energy Physics (MRST
2001), London, Ontario, Canada, 16-18 May 200
- …