from GUTs

Evidence For SUSY From GUTS? Evidence For GUTS From SUSY!

We review the theoretical and experimental status of minimal grand unified theories (GUTS), contrasting the failure of minimal non-supersymmetric SU(5) with the success of the minimal supersymmetric SU(5) and minimal supersymmetric Flipped SU(5)× U(1) models. We show that a reasonable value for the universal soft supersymmetry-breaking gaugino mass, 45GeV < m1/2 < 1TeV, and a 1−σ range of the o...

Unusual microbial xylanases from insect guts.

Recombinant DNA technologies enable the direct isolation and expression of novel genes from biotopes containing complex consortia of uncultured microorganisms. In this study, genomic libraries were constructed from microbial DNA isolated from insect intestinal tracts from the orders Isoptera (termites) and Lepidoptera (moths). Using a targeted functional assay, these environmental DNA libraries...

Higgs Boson Mass From Orbifold GUTs

We consider a class of seven-dimensional N = 1 supersymmetric orbifold GUTs in which the Standard Model (SM) gauge couplings and one of the Yukawa couplings (top quark, bottom quark or tau lepton) are unified, without low energy supersymmetry, at MGUT ≃ 4× 10 GeV. With gauge-top quark Yukawa coupling unification the SM Higgs boson mass is estimated to be 135± 6 GeV, which increases to 144± 4 Ge...

Acetogenesis from H2 plus CO2 by spirochetes from termite guts.

Pure cultures of termite gut spirochetes were obtained and were shown to catalyze the synthesis of acetate from H2 plus CO2. The 16S ribosomal DNA sequences of two strains were 98 percent similar and were affiliated with those of the genus Treponema. However, neither was closely related to any known treponeme. These findings imply an important role for spirochetes in termite nutrition, help to ...

Guts Round Questions