487 research outputs found
126 GeV Higgs Boson Associated with D-term Triggered Dynamical Supersymmetry Breaking
Continuing with our previous work on D-term triggered dynamical supersymmetry
breaking, we consider a system in which our generic N=1 action is minimally
extended to include the pair of Higgs doublet superfields charged under the
overall U(1) as well as mu and B mu terms. The gauge group is taken to be
SU(3)_C times SU(2)_L times U(1)_Y times U(1). We point out, among other
things, that the Higgs mass less than the Z-boson mass at tree level can be
pushed up to be around 126 GeV by D-term contributions of the overall U(1).
This is readily realized by taking a U(1) gauge coupling of O(1).Comment: 11 pages, 1 figure, A reference corrected, the argument of anomaly
cancellation for an overall U(1) adde
Mass Sum Rule of the Effective Action on Vacua with Broken Rigid N=1 Supersymmetry
We present an extension of the mass sum rule that applies to renormalizable
rigid supersymmetric field theories to the case of the N=1 supersymmetric
effective action (the gauged non-linear sigma model) consisting of adjoint
scalar superfields and vector superfields possessing a K"ahler potential, a set
of gauge coupling functions (second prepotential derivatives) and a
superpotential, which respectively set their energy scales. The mass sum rule
derived is valid for any vacua, including the (metastable) one of broken
supersymmetry with the condensates of D-term and/or F-term. We manage to extend
these analyses to the cases where superfields in (anti-)fundamental
representation are present. The supertrace is shown to vanish in those cases
where underlying geometry is special K"ahler and theory under concern is
anomaly free. Simple phenomenological application is given, providing an upper
bound for gaugino masses. We discuss that the effects of the D and/or F
condensates can be represented as a set of soft breaking terms with their
strengths predicted by the scales.Comment: 18 pages, no figure
D-term Dynamical Supersymmetry Breaking Generating Split N=2 Gaugino Masses of Mixed Majorana-Dirac Type
Under a few mild assumptions, N=1 supersymmetry in four dimensions is shown
to be spontaneously broken in a self-consistent Hartree-Fock approximation of
BCS/NJL type to one-loop off-shell, in the gauge theory specified by the gauge
kinetic function and the superpotential of adjoint chiral superfields, in
particular, that possesses N=2 extended supersymmetry spontaneously broken to
N=1 at tree level. The N=2 gauginos receive mixed Majorana-Dirac masses and are
split. We derive an explicit form of the gap equation, showing the existence of
a nontrivial solution.Comment: 4 pages, the paper extended (a numerical plot of the solution to the
gap equation, an estimate of the decay rate of the metastable vacuum, and
discussion on nonvanishing term induced by the D term dynamical
supersymmetry breaking diven), references adde
Anti-inflammatory sesquiterpenes from Curcuma zedoaria
This is a preprint of an article whose final and definitive form has been published in the NATURAL PRODUCT RESEARCH © 2006 copyright Taylor & Francis; NATURAL PRODUCT RESEARCH is available online at: http://www.informaworld.com/openurl?genre=article&issn=1478-6419&volume=20&issue=7&spage=680ArticleNATURAL PRODUCT RESEARCH. 20(7): 680-685 (2006)journal articl
Molten Salt Thermal Energy Storage Systems
The feasibility of storing thermal energy at temperatures of 450 C to 535 C in the form of latent heat of fusion was examined for over 30 inorganic salts and salt mixtures. Alkali carbonate mixtures were chosen as phase-change storage materials in this temperature range because of their relatively high storage capacity and thermal conductivity, moderate cost, low volumetric expansion upon melting, low corrosivity, and good chemical stability. Means of improving heat conduction through the solid salt were explored
Economic Potential of Substituting Legumes for Synthetic Nitrogen in Warm Season Perennial Grasses used for Stocker Cattle Grazing
Stocker cattle grazing warm season perennial grasses is an important economic activity in the southern Great Plains. Substantial increases in the price of nitrogen fertilizer is negatively affecting forage producers’ profitability. Two alternative nitrogen management systems that use annual and perennial legumes have been developed for bermudagrass pastures. The goal of the study is to determine if the legumes systems are more profitable than the conventional practice of applying synthetic sources of nitrogen. Results of the two-year grazing study show that the legume systems could not compete economically with the common practice.economics, grazing, legumes, bermudagrass, nitrogen fertilizer, stocker cattle, Crop Production/Industries, Farm Management, Production Economics,
New Form of the T-Duality Due to the Stability of a Compact Dimension
We study behaviors of a compact dimension and the -duality, in the
presence of the wrapped closed bosonic strings. When the closed strings
interact and form another system of strings, the radius of compactification
increases. This modifies the -duality, which we call it as -duality-like.
Some effects of the -duality-like will be studied.Comment: 12 pages, Latex, no figur
Winding number and non-BPS bound states of walls in nonlinear sigma models
Non-supersymmetric multi-wall configurations are generically unstable. It is
proposed that the stabilization in compact space can be achieved by introducing
a winding number into the model. A BPS-like bound is studied for the energy of
configuration with nonvanishing winding number. Winding number is implemented
in an supersymmetric nonlinear sigma model with two chiral scalar
fields and a bound states of BPS and anti-BPS walls is found to exist in
noncompact spaces. Even in compactified space , this nontrivial bound
state persists above a critical radius of the compact dimension.Comment: 20pages, 14 figures, minor misprint corrections, figures added,
explanation of winding number adde
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