12,863 research outputs found
Large Gauge Hierarchy in Gauge-Higgs Unification
We study a five dimensional SU(3) nonsupersymmetric gauge theory compactified
on and discuss the gauge hierarchy in the scenario of the
gauge-Higgs unification. Making use of calculability of the Higgs potential and
a curious feature that coefficients in the potential are given by discrete
values, we find two models, in which the large gauge hierarchy is realized,
that is, the weak scale is naturally obtained from an unique large scale such
as a grand unified theory scale or the Planck scale. The size of the Higgs mass
is also discussed in each model. One of the models we find realizes both large
gauge hierarchy and consistent Higgs mass, and shows that the Higgs mass
becomes heavier as the compactified scale becomes smaller.Comment: 21 pages, no figures, version to appear in PR
Search for Very High Energy Gamma-Rays from Active Galactic Nuclei with the CANGAROO-III Telescope
On Gauge Symmetry Breaking via Euclidean Time Component of Gauge Fields
We study gauge theories with/without an extra dimension at finite
temperature, in which there are two kinds of order parameters of gauge symmetry
breaking. The one is the zero mode of the gauge field for the Euclidean time
direction and the other is that for the direction of the extra dimension. We
evaluate the effective potential for the zero modes in one-loop approximation
and investigate the vacuum configuration in detail. Our analyses show that
gauge symmetry can be broken only through the zero mode for the direction of
the extra dimension and no nontrivial vacuum configuration of the zero mode for
the Euclidean time direction is found.Comment: 22 pages, 6 figures, references and typos corrected, version to
appear in PR
Biosynthesis of O-phosphoserine-containing phosphoproteins by isolated bone cells of mouse calvaria
AbstractFive groups of isolated bone cells from mouse calvaria were incubated with [3H]serine and the presence and amount of O[3H]phosphoserine used as an indication of phosphoprotein synthesis. Cells in the osteoblastic fraction were the most active in synthesizing phosphoproteins, and unlike the other cell groups, released most of the phosphoproteins into the tissue culture medium. When subjected to molecular sieving and ion-exchange chromatography, the phosphoproteins synthesized by the bone cells of the osteoblastic group behaved like the phosphoproteins extracted from mouse calvaria by EDTA
Antiproton Production in p+d Reaction at Subthreshold Energies
An enhancement of antiprotons produced in p+d reaction in comparison with
ones in p+p elementary reaction is investigated.
In the neighborhood of subthreshold energy the enhancement is caused by the
difference of available energies for antiproton production. The cross section
in p+d reaction, on the other hand, becomes just twice of the one in elementary
p+p reaction at the incident energy far from the threshold energy when
non-nucleonic components in deuteron target are not considered.Comment: LaTeX,7 pages with 5 eps figure
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