20,262 research outputs found
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
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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