28,828 research outputs found
Electroweak Symmetry Breaking from SUSY Breaking with Bosonic See-Saw Mechanism
We introduce the idea of bosonic see-saw mechanism in analogy with the
see-saw mechanism. Bosonic see-saw is a new symmetry breaking mechanism and we
apply it to explain electroweak symmetry breaking as an inevitable consequence
of supersymmetry breaking. The breaking of electroweak symmetry occurs at tree
level once supersymmetry is broken. Absence of color/charge breaking in this
model is related to doublet-triplet splitting in grand unified theory. An
extension of MSSM with a weak triplet shows very interesting results especially
when mu =0. It provides the most natural understanding of why we have only
electroweak symmetry breaking rather than having color/charge breaking. In the
limit mu=0, the model predicts very light chargino mass, 104 GeV while Higgs is
heavy, 130 GeV.Comment: 4 page
New SUSY Thought
New SUSY thought is presented. Maximal stop mixing needed for 125 GeV Higgs
is linked to the tachyonic stop at the UV boundary. Large does not mean
the severe fine tuning if Higgs comes out as a pseudo-Goldstone boson. The
small mass of the pseudo-Goldstone Higgs is overcome with extra vector-like
fermions needed to explain the Higgs to di-photon rates.Comment: 6 pages, 4 figures, Plenary Talk given at BSM of Particle Physics
2012, Qui Nhon, Vietnam, 15-21 July 201
A simple proof of Zeeman's theorem
It is discussed that Zeeman's theorem can be directly obtained from
Liouville's theorem if we assume sufficient differentiability
Inverse transitions in a spin-glass model on a scale-free network
In this paper, we will investigate critical phenomena by considering a model
spin-glass on scale-free networks. For this purpose, we consider the
Ghatak-Sherrington (GS) model, a spin-1 spin-glass model with a crystal field,
instead of the usual Ising-type model. Scale-free networks on which the GS
model is placed are constructed from the static model, in which the number of
vertices is fixed from the beginning. On the basis of the replica-symmetric
solution, we obtain the analytical solutions, i.e., free energy and order
parameters, and we derive the various phase diagrams consisting of the
paramagnetic, ferromagnetic, and spin glass phases as functions of temperature
, the degree exponent , the mean degree , and the fraction of
the ferromagnetic interactions . Since the present model is based on the
GS model, which considers the three states (), the state
plays a crucial role in the -dependent critical behavior: glass
transition temperature has a finite value, even when .
In addition, when the crystal field becomes nonzero, the present model clearly
exhibits three types of inverse transitions, which occur when an ordered phase
is more entropic than a disordered one.Comment: 11 pages, 7 figure
Brane World in Generalized Gravity
We consider Randall-Sundrum(RS) model in generalized gravities and see that
the localization of gravity happens in generic situations though its
effectiveness depends on the details of the configuration. It is shown that RS
picture is robust against quantum gravity corrections () as long as
the correction is reasonably small. We extend our consideration to the model of
scalar(dilaton) coupled gravity which leads us to the specific comparison
between RS model and inflation models. The exponential and power law hierarchy
in RS model are shown to correspond to the exponential and power law inflation
respectively.Comment: 10 pages, contribution to proceedings of COSMO2000, Cheju, Kore
Spin-glass splitting in the quantum Ghatak-Sherrington model
We propose an expanded spin-glass model, called the quantum
Ghatak-Sherrington model, which considers spin-1 quantum spin operators in a
crystal field and in a transverse field. The analytic solutions and phase
diagrams of this model are obtained by using the one-step replica
symmetry-breaking ansatz under the static approximation. Our results represent
the splitting within one spin-glass (SG) phase depending on the values of
crystal and transverse fields. The two separated SG phases, characterized by a
density of filled states, show certain differences in their shapes and phase
boundaries. Such SG splitting becomes more distinctive when the degeneracy of
the empty states of spins is larger than one of their filled states.Comment: 7 pages, 5 figure
BSM Landscape
BSM landscape of motivated and unmotivated theories is overviewed with an
emphasis on new developments guided by naturalness principle.Comment: 9 pages, 2 figures, Proceedings of The Fifth Annual Conference on
Large Hadron Collider Physics, Shanghai Jiao Tong University, Shanghai,
China, May 15-20, 201
A characterization of causal automorphisms on two-dimensional Minkowski spacetime
It is shown that causal automorphisms on two-dimensional Minkowski spacetime
can be characterized by the invariance of the wave equations
A note on conformal equivalences
A new characterization of conformal transformations is given. By use of this,
the general form of conformal transformation on two-dimensional Minkowski space
is given and its conformal structure is analyzed
An imbedding of spacetimes
It is shown that any two-dimensional spacetimes with compact Cauchy surfaces
can be causally isomorphically imbedded into the two-dimensional Einstein's
static universe. Also, it is shown that any two-dimensional globally hyperbolic
spacetimes are conformally equivalent to a subset of the two-dimensional
Einstein's static universe
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