Электропроводящие характеристики висмут-замещенных молибдатов кальция

Работа выполнена при финансовой поддержке гранта РФФИ №16-33-60026 и гранта Президента МК-7979.2016.3

Investigative Journalism in the Global Cooperation of Journalists

The article is devoted to the paradigm of investigative journalism in the era of globalization and development of information technologies. The technology of investigative journalism is presented based on the analysis of large-scale investigation «Panama offshores» whose participants were 380 journalists from 80 countries. In this article an attempt is made to understand the state of the genre of investigative journalism and its development prospects in the context of contemporary realities.Статья посвящена парадигме проведения журналистского расследования в эпоху глобализации и развития информационных технологий. Технология проведения журналистского расследования представлена на основе анализа крупномасштабного расследования «Панамских офшоров», участниками которого были 380 журналистов из 80 стран мира. Предпринимается попытка осмыслить состояние жанра журналистского расследования и перспективы его развития в контексте современных реалий

Effects of Collective Interactions of Parton Components in Processes at High Energies on Nucleons and Nuclei

Available from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

Prompt charmonia production and polarization at LHC in the NRQCD with kTk_T-factorization. II. χc\chi_c mesons

In the framework of the $k_T$-factorization approach, the production of prompt ψ(2S) mesons in pp collisions at the LHC energies is studied. Our consideration is based on the off-shell amplitudes for hard partonic subprocesses g*g*→χ$_{cJ}$ and nonrelativistic QCD formalism for bound states. The transverse-momentum-dependent (unintegrated) gluon densities in a proton were derived from the Ciafaloni-Catani-Fiorani-Marchesini evolution equation or, alternatively, were chosen in accordance with the Kimber-Martin-Ryskin prescription. Taking into account both color-singlet and color-octet contributions, we deduce the corresponding nonperturbative long-distance matrix elements from the fits to the latest ATLAS data on χ$_{c1}$ and χ$_{c2}$ transverse-momentum distributions at $\sqrt{s} =$ 7 TeV. We find that these distributions at small and moderate pT are formed mainly by the color-singlet components. We successfully described the data on the relative production rates σ(χ$_{c2}$)/σ(χ$_{c1}$) presented by the ATLAS, CMS, and LHCb Collaborations. We find that the fit points to unequal wave functions of χ$_{c1}$ and χ$_{c2}$ states

Prompt charmonia production and polarization at LHC in the NRQCD with kTk_T -factorization. Part I: ψ(2S)\psi (2S) meson

In the framework of the $k_T$ -factorization approach, the production and polarization of prompt $\psi (2S)$ mesons in pp collisions at LHC energies is studied. Our consideration is based on the non-relativistic QCD formalism for bound states and off-shell amplitudes for hard partonic subprocesses. The transverse momentum dependent (unintegrated) gluon densities in a proton were derived from the Ciafaloni–Catani–Fiorani–Marchesini evolution equation or, alternatively, were chosen in accordance with the Kimber–Martin–Ryskin prescription. The non-perturbative color-octet matrix elements were first deduced from the fits to the latest CMS data on $\psi (2S)$ transverse momentum distributions and then applied to describe the ATLAS and LHCb data on $\psi (2S)$ production and polarization at $\sqrt{s} = 7$  TeV. We perform the estimation of the polarization parameters $\lambda _\theta$ , $\lambda _\phi$ , and $\lambda _{\theta \phi }$ , which determine the $\psi (2S)$ spin density matrix and demonstrate that taking into account the off-shellness of the initial gluons in the color-octet contributions leads to unpolarized $\psi (2S)$ production at high transverse momenta, in qualitative agreement with the LHC data

Double heavy meson production through double parton scattering

The third international workshop on multiple partonic interactions (MPI) took place at DESY in Hamburg from 21 to 25 November 2011. MPI are often crucial for interpreting results obtained at the Large Hadron Collider (LHC). The quest for a sound understanding of the dynamics behind MPI { particularly in the era of the LHC { has thus focused the aim of this workshop. It concentrated on phenomenology at previous hadron colliders and early LHC results, as well as theoretical considerations and the modeling of MPI in Monte Carlo event generators. The workshop forstered close contact between the experimental and theoretical communities. It provided a setting to discuss many of the dierent aspects of MPI, eventually identifying them as a unifying concept between apparently dierent lines of research and evaluating their impact on the LHC physics programme. In a total of 45 plenary talks, two round table discussions and a poster session, the workshop covered experimental results, Monte Carlo development and tuning, phenomenology and dedicated measurements of MPI, progress of theoretical understanding as well as the role of MPI in diraction and small-x physics. Connections to closely related research within the elds of heavy ion physics and cosmic rays have also been covered

Stability of AuCl2− from 25 to 1000 °C at Pressures to 5000 bar and Consequences for Hydrothermal Gold Mobilization

Gold is transported in high-temperature chloride-bearing hydrothermal fluids in the form of AuCl2−. The stability of this complex has been extensively studied, but there is still considerable disagreement between available experimental data on the temperature region 300–500 °C. To solve this problem, we measured the solubility of gold in HCl/NaCl fluids (NaCl concentration varied from 0.1 to 3 mol·(kg H2O)−1) at 450 °C and pressures from 500 to 1500 bar (1 bar = 105 Pa). The experiments were performed using a batch autoclave method at contrasting redox conditions: in reduced experiments hydrogen was added to the autoclave, and in oxidized experiments the redox state was controlled by the aqueous SO2/SO3 buffer. Hydrogen pressure in the autoclaves was measured after the experiments in the reduced system. The gold solubility constant, Au(cr) + HCl°(aq) + Cl− = AuCl2− + 0.5 H2°(aq), was determined for the experimental T-P parameters as log Ks° = −4.77 ± 0.07 (500 bar), −5.11 ± 0.08 (1000 bar), and −5.43 ± 0.09 (1500 bar). These data, together with values from the literature for temperatures from 25 to 1000 °C, were fitted to the simple equation log Ks° = 4.302 − 7304·T(K)−1 − 4.77·log d(w) + 11080·(log d(w))·T(K)−1 − 6.94·106·(log d(w)) T(K)−2, where d(w) is the pure water density. This equation can be used together with the extended Debye–Hückel equation for activity coefficients to calculate gold solubility at pressures up to 5000 bar at fluid chlorinities at least up to 30 wt %. The speciation of gold in natural chloride-bearing fluids is discussed

Exotic rock block from the Koshava gypsum mine, Northwest Bulgaria: Petrography, geochemistry, mineralogy and melting phenomena

The described exotic rock block (60×80×13–15 cm) was found at 290 m depth in a lower–middle Badenian gypsum layer in the Koshava mine, NW Bulgaria, near the Danube River. It is greyish-black, granular, with layered structure and layers composed of α-quartz rosettes covered with organic matter (kerogen-like type with high contents of Ge, Mo and B), wood relicts with chalcedony replacement, and porous lenses with compact accumulation of organic matter. The block is coated with quartz crust, up to 2 cm thick, with regmaglypt-like forms, also replaced by quartz. Aside from the surface, melting phenomena were also observed inside the quartz rosettes and especially in the wood relicts and porous lenses. The melted drops are actually crystallized chalcedony. The organic matter accumulations contain Si-organic zoned micrometre-sized spherules. Fe silicides were found in the organic matter of all parts of the block, in which hapkeite was determined by X-ray analysis. Other detected minerals include graphite, cristobalite, coesite, skeletal and framboidal pyrite, moassanite, magnetite, suessite, sphalerite and minerals formed in the gypsum lagoon (gypsum, celestine, barite, calcite, halite and clays). The geological position of the block in the gypsum without any other sediments, the extensive melting phenomena with melted spherules, crushed quartz, its enrichment in 18O isotope and the presence of coesite suggest that it is shock ejecta, in certain aspects resembling the large Muong Nong-type tektites, but its characteristics could be the basis for distinguishing it as a new tektite type. The fact that it was found in a gypsum layer of early–middle Badenian age points to its probable association with the Ries-Steinheim impact event, despite the long distance between them (~1100 km)