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Samarium hydrogen iodate Sm(IO 3 ) 3 ·HIO 3 was successfully synthesized by the unconventional low-temperature solution-melt method, its structure was determined by X-ray diffraction analysis of single crystals. This compound crystallizes in the monoclinic space group P 2 1 / c with lattice parameters: a  = 10.4637(6) Å, b  = 7.4629(5) Å, c  = 14.0174(13) Å, β = 110.53(0), Z  = 6. In the studied structure, samarium atoms are surrounded by 8 oxygen atoms in a polyhedron in the form of a distorted square antiprism. The iodate groups are linked through common oxygen atoms of the SmO 8 antiprism into a three-dimensional framework. The compound was characterized by X-ray diffraction, IR and NQR spectroscopy and EDX analysis.

An evidence that local ordered magnetic fields from 30 to 200 G exist in diamagnets α-Bi2O3, Bi3O4Br, Bi4Ge3O12, Bi2Al4O9 which comprise neither d- nor f-elements was earlier given by the zerofield and Zeeman-perturbed209Bi nuclear quadrupole resonance (NQR) spectra. With a view to find similar spectroscopic effects in other compounds, we examined the209Bi NQR Zeeman-perturbed spectra of the Bi3B5O12 oriented single crystal as well as the zero-field spin echo envelopes in Bi3B5O12 and Bi2Ge3O9. Distinctive modulations were displayed by the zero-field209Bi spin echo envelopes in Bi2Ge3O9 powder. The modeling of the spin echo envelopes within the density matrix formalism explained the observed effect by the presence of local ordered magnetic field of the order of 65 G at the Bi atoms. The zero-field modulations of the209Bi spin echo envelopes were also observed in Bi3B5O12 indicating the presence of the internal source of line splitting. This finding and considerable deviation of the resonance intensity ratios from that in a pure NQR, found in the zero-field209Bi spectrum of the single crystal, were understood as indirect evidences that a local ordered magnetic field exists also in Bi3B5O12. The zero-field209Bi spin echo envelopes assigned to the lines split by the local magnetic fields in α-Bi2O3 and Bi4Ge3O12 were observed to display modulations on the appropriate curves.

Using the 1.32 pb-1 statistics collected at the J/ψ peak with the KEDR detector at the VEPP-4M e+e-collider, we measured the branching fractions of J/ψ meson decays to the final states 2(π+π-)π0, K+K-π+π-π0, 2(π+π-) and K+K-π+π-. The results obtained for the decays J/ψ→2(π+π-)π0, J/ψ→K+K-π+π-π0 contradict the measurements performed by other groups in the last century, but agree well with recent results of BABAR and BESIII collaborations.

The process e + e - → K + K - π 0 is studied with the SND detector at the VEPP-2000 e + e - collider. Basing on data with an integrated luminosity of 26.4  pb - 1 we measure the e + e - → K + K - π 0 cross section in the center-of-mass energy range from 1.28 up to 2 GeV. The measured mass spectrum of the K π system indicates that the dominant mechanism of this reaction is the transition through the K ∗ ( 892 ) K intermediate state. The cross section for the ϕ π 0 intermediate state is measured separately. The SND results are consistent with previous measurements in the BABAR experiment and have comparable accuracy. We study the effect of the interference between the ϕ π 0 and K ∗ K amplitudes. It is found that the interference gives sizable contribution to the measured e + e - → ϕ π 0 → K + K - π 0 cross section below 1.7 GeV.

The process e+e-→K+K-π0 is studied with the SND detector at the VEPP-2000 e+e- collider. Basing on data with an integrated luminosity of 26.4 pb-1 we measure the e+e-→K+K-π0 cross section in the center-of-mass energy range from 1.28 up to 2 GeV. The measured mass spectrum of the Kπ system indicates that the dominant mechanism of this reaction is the transition through the K∗(892)K intermediate state. The cross section for the ϕπ0 intermediate state is measured separately. The SND results are consistent with previous measurements in the BABAR experiment and have comparable accuracy. We study the effect of the interference between the ϕπ0 and K∗K amplitudes. It is found that the interference gives sizable contribution to the measured e+e-→ϕπ0→K+K-π0 cross section below 1.7 GeV.

Abstract The processe⁺e⁻→ K⁺K⁻π ⁰e + e - → K + K - π 0 is studied with the SND detector at the VEPP-2000e⁺e⁻e + e - collider. Basing on data with an integrated luminosity of 26.4 \\hbox pb⁻¹pb - 1 we measure thee⁺e⁻→ K⁺K⁻π ⁰e + e - → K + K - π 0 cross section in the center-of-mass energy range from 1.28 up to 2 GeV. The measured mass spectrum of theKπ K π system indicates that the dominant mechanism of this reaction is the transition through theK^(*)(892)KK ∗ ( 892 ) K intermediate state. The cross section for theφ π ⁰ϕ π 0 intermediate state is measured separately. The SND results are consistent with previous measurements in the BABAR experiment and have comparable accuracy. We study the effect of the interference between theφ π ⁰ϕ π 0 andK^(*)KK ∗ K amplitudes. It is found that the interference gives sizable contribution to the measurede⁺e⁻ → φ π ⁰→ K⁺K⁻π ⁰e + e - → ϕ π 0 → K + K - π 0 cross section below 1.7 GeV.

The process$$e^+e^-\\rightarrow K^+K^-\\pi ^0$$e + e - → K + K - π 0 is studied with the SND detector at the VEPP-2000$$e^+e^-$$e + e - collider. Basing on data with an integrated luminosity of 26.4 $$\\hbox {pb}^{-1}$$pb - 1 we measure the$$e^+e^-\\rightarrow K^+K^-\\pi ^0$$e + e - → K + K - π 0 cross section in the center-of-mass energy range from 1.28 up to 2 GeV. The measured mass spectrum of the$$K\\pi $$K π system indicates that the dominant mechanism of this reaction is the transition through the$$K^{*}(892)K$$K ∗ ( 892 ) K intermediate state. The cross section for the$$\\phi \\pi ^0$$ϕ π 0 intermediate state is measured separately. The SND results are consistent with previous measurements in the BABAR experiment and have comparable accuracy. We study the effect of the interference between the$$\\phi \\pi ^0$$ϕ π 0 and$$K^*K$$K ∗ K amplitudes. It is found that the interference gives sizable contribution to the measured$$e^+e^- \\rightarrow \\phi \\pi ^0\\rightarrow K^+K^-\\pi ^0$$e + e - → ϕ π 0 → K + K - π 0 cross section below 1.7 GeV.

A bstract The product of the electronic width of the J/ψ meson and the branching fractions of its decay to hadrons and electrons has been measured using the KEDR detector at the VEPP-4M e + e − collider. The obtained values are Γ e e J / ψ = 5.550 ± 0.056 ± 0.089 keV , Γ e e J / ψ · ℬ hadrons J / ψ = 4.884 ± 0.048 ± 0.078 keV , Γ e e J / ψ · ℬ e e J / ψ = 0.3331 ± 0.0066 ± 0.0040 keV . The uncertainties shown are statistical and systematic, respectively. Using the result presented and the world-average value of the electronic branching fraction, one obtains the total width of the J/ψ meson: Γ = 92.94 ± 1.83 keV . These results are consistent with the previous experiments.

This article revealed the main problems in the functioning of regular public transport buses (RPTB) affecting the quality of transport services for the population (QTSP) on the basis of survey results concerning the Krasnodar municipal route network. The statistical analysis of passenger transportation volume is performed on the basis of which a flexible approach and the methodology of the municipal route network optimization is proposed, the use of which allows to ensure the balance of interests for the participants of the transportation services market (\"customer\" - \"performer\" - \"consumer\") with the maximization of the resulting indicators. The estimated economic-mathematical model of the municipal route network optimization for RPTB is offered.

The Super C- τ (SCT) Factory at Novosibirsk is a project of new colliding beam experiment proposed in Budker Institute of Nuclear Physics. Electron-positron collider based on Crab-Waist technique for operation energy range 2–5 GeV in center of mass is suggested. The luminosity up to 10 35 cm −1 s −1 (in 100 times higher than in operated today experiments in this energy region) is expected. To perform broad experimental program of the project successfully the excellent particle identification (PID) system is needed. A number of options are under consideration. Three of them are described in the paper: Focusing Aerogel RICH (FARICH) detector, threshold Cherenkov counters based on ASHIPH (Aerogel SHifter PHotomultiplier) technique with 6000 litres of aerogel of two refractive indexes and time-of-flight counters with TOP (Time of Propagation) approach with time resolution better than 30 ps. Comparison of PID capabilities with help of parametric simulation is given.