3,954 research outputs found
Effects of -meson on the EOS of hyperon star in the relativistic mean field model
Nuclear effective interactions are considered as a vital tool to guide into
the region of the high degree of isospin asymmetry and density. We take
varieties of parameter sets of the RMF model to show the parametric dependence
of the hyperon star properties. We add -meson to
-- model. The effects of -meson on the equation
of state and consequently on the maximum mass of the hyperon star are
discussed. Due to the inclusion of -meson the threshold density of
different hyperon production shift to higher density region. The effects of the
hyperon-meson coupling constants on the maximum mass and radius of the hyperon
stars are discussed
Use of transverse beam polarization to probe anomalous VVH interactions at a Linear Collider
We investigate use of transverse beam polarization in probing anomalous
coupling of a Higgs boson to a pair of vector bosons, at the International
Linear Collider (ILC). We consider the most general form of VVH (V = W/Z)
vertex consistent with Lorentz invariance and investigate its effects on the
process e+ e- --> f bar{f} H, f being a light fermion. Constructing observables
with definite CP and naive time reversal (tilde T) transformation properties,
we find that transverse beam polarization helps us to improve on the
sensitivity of one part of the anomalous ZZH coupling that is odd under CP.
Even more importantly it provides the possibility of discriminating from each
other, two terms in the general ZZH vertex, both of which are even under CP and
tilde T. Use of transverse beam polarization when combined with information
from unpolarized and linearly polarized beams therefore, allows one to have
completely independent probes of all the different parts of a general ZZH
vertex.Comment: 15 pages, 3 figures, published versio
Dynamical Restoration of Z_N Symmetry in SU(N)+Higgs Theories
We study the Z_N symmetry in SU(N)+Higgs theories with the Higgs field in the
fundamental representation. The distributions of the Polyakov loop show that
the Z_N symmetry is explicitly broken in the Higgs phase. On the other hand,
inside the Higgs symmetric phase the Polyakov loop distributions and other
physical observables exhibit the Z_N symmetry. This effective restoration of
the Z_N symmetry changes the nature of the confinement-deconfinenement
transition. We argue that the Z_N symmetry will lead to time independent
topological defect solutions in the Higgs symmetric deconfined phase which will
play important role at high temperatures.Comment: 13 pages, 4 figure
Anomalous Triple Gauge Vertices at the Large Hadron-Electron Collider
At a high energy collider, such as the Large Hadron-Electron Collider
(LHeC) which is being planned at CERN, one can access the vertex
exclusively in charged current events with a radiated photon, with no
interference from the vertex. We find that the azimuthal angle between
the jet and the missing momentum in each charged current event is a sensitive
probe of anomalous couplings, and show that for quite reasonable
values of integrated luminosity, the LHeC can extend the discovery reach for
these couplings beyond all present experimental bounds.Comment: 11 pages, LaTeX2e, 5 EPS figure
Spatial and temporal patterns of distribution of the gap junction protein connexin43 during mouse gastrulation and organogenesis
Connexin43 (Cx43) is a member of the family of channel-forming proteins that make up the gap junction and are believed to provide pathways for cell-cell exchange of developmental signals. We have used immunofluorescence and confocal microscopy to characterize the patterns of distribution of Cx43 in postimplantation mouse embryos representing stages of development extending through gastrulation and the major period of organogenesis [through 13.5 days post coitum (dpc)]. We find that Cx43 is expressed early after implantation by the undifferentiated, pluripotent cells of the primitive embryonic ectoderm from which all tissues of the fetus are believed to be derived. As cells become committed to particular developmental pathways, there is a progressive restriction of Cx43 to specific areas and organ systems. The patterns are complex and not limited by germ layer of origin, although there is a clear preference for expression in ectodermal and, to a lesser extent, mesodermal derivatives. Expression in lens, retina, kidney, brain, pineal and pituitary glands is initiated early in organogenesis. In heart, the first clear signal for Cx43 appears in the ventricle at about 10 dpc and is only subsequently detected in the atrium at about 13-13.5 dpc. Particularly intriguing with regard to functional implications is the high level expression observed at sites of inductive interaction; the eye lens and optic cup, the infundibulum and the apical ectodermal ridge of the limb bud
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