336 research outputs found
Analysis of SO(2N) Couplings of Spinor and Tensor Representations in Invariant Forms
A review is given of a recently developed technique for the analysis of
SO(2N) invariant couplings which allows a full exhibition of the SU(N)
invariant content of couplings involving the SO(2N) semi-spinors
with chiralilty and tensor representations. We discuss the Basic Theorem
used in the analysis and then exhibit the technique by illustrative examples
for the computation of the trilinear and quartic couplings for the SO(10) case
involving three generations of 16 plets of matter.Comment: 8 pages Latex. Prepared for Proceedings of Pran Nath Fest in
PASCOS04, August 17-22, 200
Yukawa Couplings and Quark and Lepton Masses in an SO(10) Model with a Unified Higgs Sector
An analytic computation is given of the generation of Yukawa couplings and of
the quark, charged lepton and neutrino masses in the framework of an SO(10)
model with a unified Higgs sector consisting of a single pair of vector-spinor
of Higgs multiplets. This unified Higgs sector allows
for a breaking of SO(10) to the gauge group
and contains light Higgs doublets allowing for the breaking of the electroweak
symmetry. Fermion mass generation in this model typically arises from quartic
couplings and . Extending a previous work it is shown that
much larger third generation masses can arise for all the fermions from mixing
with 45 and 120 matter multiplets via the cubic couplings
and . Further it is found
that values of as low as 10 can allow for a unification
consistent with current data. The quartic and cubic couplings naturally lead to
Dirac as well as Majorana neutrino masses necessary for the generation of See
Saw neutrino masses.Comment: 34 page, 1 figur
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