275 research outputs found
Predictive neutrino mass textures with origin of flavor symmetries
We investigate origins of predictive one-zero neutrino mass textures in a
systematic way. Here we search Abelian continuous(discrete) global symmetries,
and non-Abelian discrete symmetries, and show how to realize these neutrino
masses. Then we propose a concrete model involving a dark matter candidate and
an extra gauge boson, and show their phenomenologies.Comment: 23 pages, 3 figures, version accepted for publication in physical
review
Non-Abelian Discrete Symmetries in Particle Physics
We review pedagogically non-Abelian discrete groups, which play an important
role in the particle physics. We show group-theoretical aspects for many
concrete groups, such as representations, their tensor products. We explain how
to derive, conjugacy classes, characters, representations, and tensor products
for these groups (with a finite number). We discussed them explicitly for
, , , , , , , ,
and , which have been applied for model building
in the particle physics. We also present typical flavor models by using ,
, and groups. Breaking patterns of discrete groups and
decompositions of multiplets are important for applications of the non-Abelian
discrete symmetry. We discuss these breaking patterns of the non-Abelian
discrete group, which are a powerful tool for model buildings. We also review
briefly about anomalies of non-Abelian discrete symmetries by using the path
integral approach.Comment: 179 pages, 8 figures, section 15 is changed, some references are
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Evidence of mature adipocyte proliferation regulated by proliferin
Despite much research, whether mature adipocytes proliferate remains controversial. Here, we examined 5-bromo-2′-deoxyuridine (BrdU)-labelling of mature adipocytes. Although BrdU incorporation into subcutaneous adipocytes was less than that in visceral adipocytes, pioglitazone (Pio) treatment increased BrdU incorporation in subcutaneous, but not visceral, adipocytes in rats. Fully differentiated 3T3-L1 adipocytes exhibited an increase in cell number and BrdU incorporation with time, with this increase enhanced by Pio treatment. We therefore screened for genes that encode growth factors regulated by Pio, and selected proliferin (PLF). Both gene silencing of PLF by small interfering RNA and treatment with anti-PLF antibody suppressed proliferation in 3T3-L1 adipocytes. In adipocytes isolated from Pio-treated rats, the tissue-specific pattern of PLF expression was similar to that of BrdU incorporation. Administration of an anti-PLF antibody to mice reduced BrdU incorporation into adipocytes. Mature adipocytes thus have the ability to replicate, and this proliferation is positively regulated by PLF
Little SUSY hierarchy in mixed modulus-anomaly mediation
Motivated by the KKLT string compactification involving a
supersymmetry-breaking uplifting potential, we examine 4D effective
supergravity with a generic form of uplifting potential, focusing on the
possibility that the resulting mixed modulus-anomaly mediated soft terms
realize the little hierarchy between the Higgs boson masses and the
sparticle masses . It is noted that for some type of uplifting
potential, the anomaly-mediated contribution to at can cancel
the subsequent renormalization group evolution of down to TeV scale,
thereby the model can naturally realize the little hierarchy which is desirable for the lightest Higgs boson mass to
satisfy the experimental bound. In such models, the other Higgs mass parameters
and can have the desirable size without severe
fine-tuning of parameters, although the gravitino is much heavier than the
Higgs boson. Those models for the little hierarchy avoid naturally the
dangerous SUSY flavor and CP violations, and predict nearly degenerate low
energy gaugino masses, pure Higgsino LSP, and also a specific relation between
the stop and gaugino masses.Comment: revtex4, 16 page
Lambert-Eaton myasthenic syndrome associated with an anterior mediastinal small cell carcinoma
<Abstract of published report>Tissue-specific Expression of Two Isoforms of Chicken Fibroblast Growth Factor Receptor, bek and Cek 3.
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