189 research outputs found
Quark Mass Matrix with a Structure of a Rank One Matrix Plus a Unit Matrix
A quark mass matrix model is proposed where
and is a
unit matrix plus a rank one matrix. Up- and down-quark mass matrices and
are described in terms of charged lepton masses and additional three
parameters (one in and two in ). The model can predict reasonable
quark mass ratios (not only , , and , but
also ) and Kobayashi-Maskawa matrix elements.Comment: 8 pages, Latex, no figure
Top Quark Mass Enhancement in a Seesaw-Type Quark Mass Matrix
We investigate the implications of a seesaw type mass matrix, i.e.,
, for quarks and leptons under the assumption
that the matrices and are common to all flavors (up-/down- and
quark-/lepton- sectors) and the matrices characterizing the heavy fermion
sectors have the form [(unit matrix) + (a democratic matrix)] where
is a flavor parameter. We find that by adjusting the complex parameter ,
the model can provide that while at the same time keeping without assuming any parameter with hierarchically different values
between and . The model with three adjustable parameters under the
``maximal" top quark mass enhancement can give reasonable values of five quark
mass ratios and four KM matrix parameters.Comment: 22 pages, Latex, 5 postscript figures available upon reques
A note on a decomposition theorem for simple deterministic languages
A procedure to resolve simple deterministic languages into the concatenation of other simple deterministic languages is presented
The Hadronic Tau Decay Signature of a Heavy Charged Higgs Boson at LHC
The hadronic tau decay channel offers by far the best signature for heavy
charged Higgs boson search at the LHC in the large region. By
exploiting the distinct polarization of the tau and its large transverse mass,
along with the accompanying missing--, one can probe for a charged Higgs
boson up to a mass of about 600 GeV in an essentially background-free
environment. The transverse mass distribution of the tau jet also provides a
fairly unambiguous estimate of the charged Higgs boson mass.Comment: 11 pages, latex, including 3 figure
Analytical Expressions of Masses and Mixings in a Democratic Seesaw Mass Matrix Model
On the basis of a seesaw-type mass matrix model
for quarks and leptons , analytical expressions of the masses and mixings of
the fermions are investigated. Here, the matrices and are
common to all (up- and down-; quarks and leptons), and the matrix
characterizing the heavy fermion sector has the form [(unit matrix)+
(democratic-type matrix)]. An application to the quark sectors is discussed.Comment: 27 pages, Latex, three PostScript figure
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