101 research outputs found
Non-perturbative solutions in the electro-weak theory with condensate and the -quark mass
We apply Bogoliubov compensation principle to the gauge electro-weak
interaction to demonstrate a spontaneous generation of anomalous three-boson
gauge invariant effective interaction. The non-trivial solution of compensation
equations uniquely defines the form-factor of the anomalous interaction and
parameters of the theory including value of gauge electro-weak coupling
in satisfactory agreement with its experimental value. A possibility
of spontaneous generation of effective four-fermion interaction of heavy quarks
is also demonstrated. This interaction defines an equation for a scalar bound
state of heavy quarks which serve as a substitute for the elementary scalar
Higgs doublet. As a result we calculate the -quark mass
in satisfactory agreement with the experimental value. The results strongly
support idea of condensate as a source of the electro-weak symmetry
breaking.Comment: 16 pages, 5 figures. arXiv admin note: substantial overlap with
arXiv:1103.395
CDF Wjj anomaly as a non-perturbative effect of the electro-weak interaction
The recently reported CDF excess at in invariant mass
distribution of jet pairs accompanying -boson is tentatively interpreted as
a bound state of two decaying to quark-anti-quark pair. Non-perturbative
effects of EW interaction obtained by application of Bogoliubov compensation
approach lead to such bound state due to existence of anomalous three-boson
gauge-invariant effective interaction. The application of this scheme gives
satisfactory agreement with existing data without any adjusting parameter but
the bound state mass .Comment: 5 pages, 2 figure
Synthesis and phase stability of the ZrO2-Ln2O3-Ta2O5 compositions for high tetragonality zirconia-based thermal barrier coatings
State-of-the-art TBC topcoat material is zirconia partially stabilized by 6-8% of yttria (ZY). The temperature limit for ZY coatings was determined to be 1200ºC on the basis of phase transitions and sintering properties. Rare-earth zirconates (Ln2Zr2O7) with pyrochlore structure were found to be very promising for thermal barrier coating materials. They possess high thermal stability up to the melting point (around 2300ºC), low thermal conductivity (1.5 W/m·K at 1000ºC for bulk material) and low sintering rate, but their fracture toughness is very low.
On the other hand, a lot of experimental work was carried out on the search of alternative tetragonal zirconia stabilizers. Rare-earth oxides (neodymia, samaria, gadolinia, dysprosia, ytterbia, scandia and others) stabilized zirconia coatings were proved to have excellent mechanical properties combined with low thermal conductivity. It was found, that co-doped stabilized compositions offer better properties than ones with single stabilizer. Usually in the co-doped compositions the primary component is yttria and the secondary is rare-earth oxide, both components are stabilizers for zirconia. These compositions were shown to be effective in decreasing thermal conductivity, but their fracture toughness was decreased too. On that reason there is a trend on zirconia doping with destabilizing oxides to increase the tetragonality index and have low thermal conductivity at the same time.
The present paper focuses on the co-precipitation synthesis and properties of the yttrium (YTaO4), neodymium (NdTaO4), gadolinium (GdTaO4) and dysprosium (DyTaO4) tantalate powder and tantalate-stabilized zirconia powders ZrO2-YTaO4, ZrO2-NdTaO4. ZrO2-GdTaO4 or ZrO2-DyTaO4. Their phase composition was investigated at different calcination temperatures. Both yttrium and rare earth tantalates were shown to have two types of monoclinic structures (M and M’). As to zirconia-based compositions, both single and multi-phase samples were obtained depending on the tantalate amount and calcination temperature. Tetragonality indexes up to 1,027 were obtained
LHC would-be excess as a non-perturbative effect of the electro-weak interaction
The recently reported would-be excess at in invariant mass
distribution of and of obtained in the
course of the Higgs boson search at LHC is tentatively interpreted as a scalar
bound state of two . Non-perturbative effects of EW interaction obtained by
application of Bogoliubov compensation approach lead to such bound state due to
existence of anomalous three-boson gauge-invariant effective interaction. The
application of this scheme gives satisfactory agreement with existing data
without any adjusting parameter but the bound state mass , while
for resonance is predicted to be twice more as
the value for the SM Higgs. Decay channel may serve as a
decisive check of the interpretation.Comment: 6 pages, 4 figures. arXiv admin note: text overlap with
arXiv:1110.313
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