24,364 research outputs found
Electric Dipole Moments in the Generic Supersymmetric Standard Model
The generic supersymmetric standard model is a model built from a
supersymmetrized standard model field spectrum the gauge symmetries only. The
popular minimal supersymmetric standard model differs from the generic version
in having R-parity imposed by hand. We review an efficient formulation of the
model and some of the recently obtained interesting phenomenological features,
focusing on one-loop contributions to fermion electric dipole moments.Comment: 1+7 pages Revtex 3 figures incoporated; talk at NANP'0
Quantum Spacetime Pictures and Dynamics from a Relativity Perspective
Based on an identified quantum relativity symmetry the contraction of which
gives the Newtonian approximation of Galilean relativity, a quantum model of
the physical space can be formulated with the Newtonian space seen in a way as
the classical approximation. Matching picture for the observable algebra as the
corresponding representation of the group C* -algebra, describes the full
dynamical pictures equally successfully. Extension of the scheme to a Lorentz
covariant setting and beyond will also be addressed.The formulation of quantum
mechanics allows the theory to be seen in a new picture in line with the notion
of a noncommutative spacetime.Comment: For submission to Proc. of 10th Meeting of Balkan Physics Union,
Sofia, Bulgari
Neutrino Masses and Beyond from Supersymmetry
A generic form of the supersymmetric SM naturally gives rise to the lepton
number violating neutrino masses and mixings, without the need for extra
superfields beyond the minimal spectrum. Hence, SUSY can be consider the origin
of beyond SM properties of neutrinos. We have developed a formulation under
which one can efficiently analyze the model. Various sources of neutrino masses
are discussed in details. Such mass contributions come from lepton number and
flavor violating couplings that also give rise to a rich phenomenology of the
neutrinos and other leptons, to be discussed.Comment: +8 latex pages with ws-procs9x6.cls (included); talk at NOON 200
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Interaction of the westerlies with the Tibetan Plateau in determining the Mei-Yu termination
This study explores how the termination of the mei-yu is dynamically linked to the westerlies impinging on the Tibetan Plateau. It is found that the mei-yu stage terminates when the maximum upper-tropospheric westerlies shift beyond the northern edge of the plateau, around 408N. This termination is accompanied by the disappearance of tropospheric northerlies over northeastern China. The link between the transit of the jet axis across the northern edge of the plateau, the disappearance of northerlies, and termination of the mei-yu holds on a range of time scales from interannual through seasonal and pentad. Diagnostic analysis indicates that the weakening of the meridional moisture contrast and meridional wind convergence, mainly resulting from the disappearance of northerlies, causes the demise of the mei-yu front. The authors propose that the westerlies migrating north of the plateau and consequent weakening of the extratropical northerlies triggers the mei-yu termination. Model simulations are employed to test the causality between the jet and the orographic downstream northerlies by repositioning the northern edge of the plateau. As the plateau edge extends northward, orographic forcing on the westerlies strengthens, leading to persistent strong downstream northerlies and a prolonged mei-yu. Idealized simulations with a dry dynamical core further demonstrate the dynamical link between the weakening of orographically forced downstream northerlies with the positioning of the jet from south to north of the plateau. Changes in the magnitude of orographically forced stationary waves are proposed to explain why the downstream northerlies disappear when the jet axis migrates beyond the northern edge of the plateau
The Light, the Heavy and the Superheavy --- a Nonabelian Flavor Symmetry for the Full Hierarchy
We give a preliminary report of a new quark mass matrix model basing on a
symmetry embedding into a fully gauged
.~\cite{fk} The two 's contain the
standard SUSY as a diagonal subgroup, while the or is
horizontal. Starting by assuming a judiciously-chosen set of chiral
supermultiplets, and a pattern of spontaneous symmetry breaking, we obtain the
low-energy chiral fermions together with a spectrum of superheavy fermions at
two different scales. The latter mediate Froggatt-Nielsen tree graphs that give
rise to a phenomenologically viable effective quark mass matrix texture. The
model is the first example of a nontrivial combination of supersymmetry without
R-parity, gauged nonabelian horizontal symmetry and
unification/anti-unification. It is expected to have some very interesting
features in SUSY-GUT phenomenology.Comment: missing title page restore
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