Jet Energy Density in Hadron-Hadron Collisions at High Energies

The average particle multiplicity density dN/deta is the dynamical quantity which reflects some regularities of particle production in low-pT range. The quantity is an important ingredient of z-scaling. Experimental results on charged particle density are available for pp, pA and AA collisions while experimental properties of the jet density are still an open question. The goal of this work is to find the variable which will reflect the main features of the jet production in low transverse energy range and play the role of the scale factor for the scaling function psi(z) and variable z in data z-presentation. The appropriate candidate is the variable we called "scaled jet energy density". Scaled jet energy density is the probability to have a jet with defined ET in defined xT and pseudorapidity regions. The PYTHIA6.2 Monte Carlo generator is used for calculation of scaled jet energy density in proton-proton collisions over a high energy range (sqrt s = 200-14000 GeV) and at eta = 0. The properties of the new variable are discussed and sensitivity to "physical scenarios" applied in the standard Monte Carlo generator is noted. The results of scaled jet energy density at LHC energies are presented and compared with predictions based on z-scaling.Comment: 11 pages, LaTeX, 8 figures, Presented at the XVII International Baldin Seminar on High Energy Physics Problems "Relativistic Nuclear Physics & Quantum Chromodynamics", Dubna, Russia, September 27 - October 2, 200

Charge transport in polyaniline heavily doped with p-toluenesulfonic acid

First results of a 3-cm (9.7 GHz) and 2-mm (140 GHz) waveband EPR study of the magnetic and electron-transport properties over a wide temperature range are reported for the crystalline phase of polyaniline highly doped with p-toluenesulfonic acid. The nature of charge carriers was analyzed and the mechanism of charge transport was established. The spin-lattice and spin-spin relaxation times were measured using the continuous saturation technique. Quasi-three-dimensional (Q3D) domains with a high conductivity are formed in polyaniline by doping. The effective electric conductivity of the polymer is determined by Mott Q3D hopping in domains of this type and Q1D variable-range hopping between these domains. There is no correlation between charge transport and spin relaxation processes. Copyright © 2005 by Pleiades Publishing, Inc

Charge transport in polyaniline heavily doped with p-toluenesulfonic acid

First results of a 3-cm (9.7 GHz) and 2-mm (140 GHz) waveband EPR study on the magnetic and electron-transport properties over a wide temperature range are reported for the crystalline phase of polyaniline highly doped with p-toluenesulfonic acid. The nature of charge carriers was analyzed and the mechanism of charge transport was established. The spin-lattice and spin-spin relaxation times were measured using the continuous saturation technique. Quasi-three-dimensional (Q3D) domains with a high conductivity are formed in polyaniline by doping. The effective electric conductivity of the polymer is determined by Mott Q3D hopping in domains of this type and Q1D variable-range hopping between these domains. There is no correlation between charge transport and spin relaxation processes

Chemical surface deposition of CdS thin films from CdI2 aqueous solution

For the first time using CdI2 solution CdS films on glass and ITO coated glass substrates were produced by the method of layerwise chemical surface deposition (ChSD). CdS thin films with the widths from 40 nm to 100 nm were obtained for windows in solar cells based on CdS/CdTe heterojunctions. Changes of the structural and optical properties of CdS films due to air annealing are shown. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/910

Criminal protection of rights and legal interests of minors

В статье рассматриваются особенности квалификации общественно-опасного деяния в виде неоднократной розничной продажи алкогольной продукции несовершеннолетним.The article is devoted to the analysis of the specialties of qualification of the socially dangerous act like repeated retail sale of alcoholic products to minors

On saturation of charged hadron production in pp collisions at LHC

First results on charged hadron transverse momentum spectra in pp collisions obtained by the CMS Collaboration at LHC were analyzed in z-scaling approach. The first LHC data confirm z-scaling. The saturation regime of the scaling function psi(z) observed in pp and antp-pp interactions at lower energy sqrt s = 19-1960 GeV is verified. The saturation of psi(z) for charged hadrons is found down to z=0.05 at the highest energy sqrt s = 2360 GeV reached till now at colliders. A microscopic scenario of hadron production is discussed in connection with search for new signatures of phase transitions in hadron matter. Constituent energy loss and its dependencies on the transverse momentum of charged hadrons and collision energy are estimated. The beam energy scan at LHC in the saturation region is suggested.Comment: LaTeX, 6 pages, 6 figure

Influence of Silicon on Temperature Dependence of Thermal Conductivity of Al–Si–Fe Alloys

Temperature dependence analysis of thermal conductivity was carried out for series of aluminum alloys with 1% Fe (mass%) and different content of silicon starting from 0% to 6% (mass%). It is shown that the best alloy for heat exchange applications is alloy with 4% of silicon (mass%). Temperature dependence of thermal conductivity shows the strong decreasing character for silicon-alloyed samples in comparison to pure aluminum. Keywords: aluminum–silicon alloys, thermal conductivity, heat exchange, iron, cast alloys, structure, temperatur

Analysis of fractal events with background

Properties of self-similarity and fractality in the processes of interactions of hadrons and nuclei at high energies are discussed. Different methods of fractal analysis (the box counting BC, system of the equations of p-adic coverage S ePaC methods) are described. Fractal analysis of mixed events was carried out by BC and S ePaC methods. The procedure of separation of fractals and background, estimation of the number of fractals in the original data set and contamination of the extracted data was proposed. The dependence of event contamination on multiplicity and background is studied. Reconstruction of the spectrum of fractal dimensions is found to depend on the method and background

Photon Physics in Heavy Ion Collisions at the LHC

Various pion and photon production mechanisms in high-energy nuclear collisions at RHIC and LHC are discussed. Comparison with RHIC data is done whenever possible. The prospect of using electromagnetic probes to characterize quark-gluon plasma formation is assessed.Comment: Writeup of the working group "Photon Physics" for the CERN Yellow Report on "Hard Probes in Heavy Ion Collisions at the LHC", 134 pages. One figure added in chapter 5 (comparison with PHENIX data). Some figures and correponding text corrected in chapter 6 (off-chemical equilibrium thermal photon rates). Some figures modified in chapter 7 (off-chemical equilibrium photon rates) and comparison with PHENIX data adde