91 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
The Power Flow Angle of Acoustic Waves in Thin Piezoelectric Plates
The curves of slowness and power flow angle (PFA) of quasi-antisymmetric (A0) and quasi-symmetric (S0) Lamb waves as well as quasi-shear-horizontal (SH0) acoustic waves in thin plates of lithium niobate and potassium niobate of X-,Y-, and Z-cuts for various propagation directions and the influence of electrical shorting of one plate surface on these curves and PFA have been theoretically investigated. It has been found that the group velocity of such waves does not coincide with the phase velocity for the most directions of propagation. It has been also shown that S0 and SH0 wave are characterized by record high values of PFA and its change due to electrical shorting of the plate surface in comparison with surface and bulk acoustic waves in the same material. The most interesting results have been verified by experiment. As a whole, the results obtained may be useful for development of various devices for signal processing, for example, electrically controlled acoustic switchers
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
The characteristics of fundamental shear-horizontal acoustic waves in structure “nanocomposite polymeric film-vacuum gap-piezoelectric plate”
AbstractRecently it has been shown that SH0 wave in structure “piezoelectric plate-nanocomposite polymeric film with Fe nanoparticles” is characterized by the low TCD (∼15 ppm/C) and high value of K2 (∼32%). However in the case of the acoustical contact of polymeric material with the plate such structure possesses significant attenuation of the acoustic wave (∼1dB/λ). In order to avoid this effect it was suggested to use the structure containing the gap between the polymeric film and plate. As the result of theoretical analysis the dependencies of SH0 wave velocity versus relative thickness of vacuum gap were obtained. It has been found that there exist such values of gap and dielectric permittivity of the nanocomposite material when the value of TCD of SH0 wave significantly decreases. At that the attenuation connected with the dissipation factor is practically absent
Emission Monitoring Mobile Experiment (EMME): An overview and first results of the St. Petersburg megacity campaign 2019
Global climate change is one of the most important scientific, societal and economic contemporary challenges. Fundamental understanding of the major processes driving climate change is the key problem which is to be solved not only on a global but also on a regional scale. The accuracy of regional climate modelling depends on a number of factors. One of these factors is the adequate and comprehensive information on the anthropogenic impact which is highest in industrial regions and areas with dense population – modern megacities. Megacities are not only “heat islands”, but also significant sources of emissions of various substances into the atmosphere, including greenhouse and reactive gases. In 2019, the mobile experiment EMME (Emission Monitoring Mobile Experiment) was conducted within the St. Petersburg agglomeration (Russia) aiming to estimate the emission intensity of greenhouse (CO, CH) nd reactive (CO, NO) gases for St. Petersburg, which is the largest northern megacity. St. Petersburg State University (Russia), Karlsruhe Institute of Technology (Germany) and the University of Bremen (Germany) jointly ran this experiment. The core instruments of the campaign were two portable Bruker EM27/SUN Fourier transform infrared (FTIR) spectrometers which were used for ground-based remote sensing measurements of the total column amount of CO, CH and CO at upwind and downwind locations on opposite sides of the city. The NO tropospheric column amount was observed along a circular highway around the city by continuous mobile measurements of scattered solar visible radiation with an OceanOptics HR4000 spectrometer using the differential optical absorption spectroscopy (DOAS) technique. Simultaneously, air samples were collected in air bags for subsequent laboratory analysis. The air samples were taken at the locations of FTIR observations at the ground level and also at altitudes of about 100 m when air bags were lifted by a kite (in case of suitable landscape and favourable wind conditions). The entire campaign consisted of 11 mostly cloudless days of measurements in March–April 2019. Planning of measurements for each day included the determination of optimal location for FTIR spectrometers based on weather forecasts, combined with the numerical modelling of the pollution transport in the megacity area. The real-time corrections of the FTIR operation sites were performed depending on the actual evolution of the megacity NO plume as detected by the mobile DOAS observations. The estimates of the St. Petersburg emission intensities for the considered greenhouse and reactive gases were obtained by coupling a box model and the results of the EMME observational campaign using the mass balance approach. The CO emission flux for St. Petersburg as an area source was estimated to be 89 ± 28 ktkm yr , which is 2 times higher than the corresponding value in the EDGAR database. The experiment revealed the CH emission flux of 135 ± 68 tkm yr , which is about 1 order of magnitude greater than the value reported by the official inventories of St. Petersburg emissions (∼ 25 tkm yr or 2017). At the same time, for the urban territory of St. Petersburg, both the EMME experiment and the official inventories for 2017 give similar results for the CO anthropogenic flux (251 ± 104 tkm yr s. 410 tkm yr ) nd for the NO anthropogenic flux (66 ± 28 tkm yr vs. 69 tkm yr )
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