1,900 research outputs found
Dynamical Inflation and Vacuum Selection
We consider an inflationary scenario where the energy scale of inflation
stems from gauge theory dynamics. We point out its generic implications on
vacuum selection of our universe, in particular, on determination of spacetime
symmetries including its dimensions.Comment: 5 pages, late
Dynamical Supersymmetry Breaking in Vector-like Gauge Theories
We provide vector-like gauge theories which break supersymmetry dynamically.Comment: 3 pages, phyzzx, to appear in Prog. Theor. Phy
Strongly Coupled Gauge Mediation
A model of gauge mediation with the gravitino mass of order 1eV is considered
to motivate 100TeV colliders. Massive mediators with standard-model and
supersymmetry-breaking gauge quantum numbers let low-scale dynamics induce
sizable soft masses of the standard-model superpartners. We circumvent
potential phenomenological difficulties that such low-scale models tend to
cause.Comment: 7 page
A Gauge Mediation Model of Dynamical Supersymmetry Breaking without Color Instability
We construct a gauge mediation model of dynamical supersymmetry breaking
(DSB) based on a vector-like gauge theory, in which there is a unique
color-preserving true vacuum. The DSB scale turns out to be as
high as , since the transmission of the DSB
effects to the standard model sector is completed through much higher loops.
This model is perfectly natural and phenomenologically consistent. We also
stress that the dangerous D-term problem for the messenger U(1)_m is
automatically solved by a charge conjugation symmetry in the vector-like gauge
theory.Comment: 11 pages, Late
Cosmological Constants as Messenger between Branes
We present a supersymmetry-breaking scenario in which both the breaking in
the hidden sector with no-scale type supergravity and that in the observable
sector with gauge mediation are taken into account. The breaking scales in the
hidden and observable sectors are related through the vanishing condition of
the cosmological constant with a brane-world picture in mind. Suppressing
flavor-changing neutral currents, we can naturally obtain the gravitino,
Higgs(ino), and soft masses of the electroweak scale.Comment: 7 pages, Late
R-Invariant Topological Inflation
We propose a topological inflation model in the framework of supergravity
with invariance. This topological inflation model is not only free from the
initial value problem of the inflaton field but also gives low reheating
temperature which is favored in supergravity since the overproduction of
gravitinos is avoided. Furthermore, the predicted spectrum of the density
fluctuations is generally tilted, which will be tested by future observations
on CMB anisotropies and large scale structure of the universe.Comment: 7pages (RevTeX file
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