[en] The ability of the ALICE detector for determination of the space-time characteristics of particle production in heavy-ion collisions at LHC from measurements of the correlation functions of identical and non-identical particles at small relative velocities is discussed. The possibility to use the correlations of non-identical particles for a direct determination of the delays in emission of various particle species at time scales as small as 10^-23 s is demonstrated. The influence of the multi-boson effects on pion multiplicities, single-pion spectra and two-pion correlation functions is discussed. (author)

[en] The subject of this paper is a comparative analysis of forward and backward pion and antiproton production and search for new peculiarities of cumulative process. The comparison of the data on cumulative pion and antiproton production in forward and backward hemispheres obtained by the same experimental procedure shows: the dependences of cumulative antiproton production cross sections on T (kinetic energy of secondaries) or X (cumulative number) are nonmonotonous; the target atomic mass dependences of forward and backward pion and antiproton production are vert similar; very weak dependence of cumulative antiproton production cross sections on transverse momentum is observed; the values of the slope parameters of pion spectra at 59 deg are less than for backward angles by approximately 20 per cents; no change of slope parameters at X ∼ 1 for forward high momentum cumulative pion production is observed

[en] Transitional millisecond pulsars (tMSPs) switch between an accretion-powered state without radio pulsations and a rotation-powered state with radio pulsations. In the former state, tMSPs are X-ray bright, while in the latter state, they are X-ray dim. Soft X-ray transients (SXTs) undergo similar switches in X-ray, between “high” states with bright X-ray outbursts and “low” states of quiescence. The upper limit on the quiescent X-ray luminosity of SXT 1H 1905+000 suggests that its luminosity might be similar to that of the known tMSPs. A detection of radio pulsations would link SXTs more strongly with tMSPs; and thus, e.g., put stricter constraints on tMSP transitional timescales through the connection with the well-known SXT periods of quiescence. A nondetection allows us, based on the telescope sensitivity, to estimate how likely these sources are to pulsate in radio. Over a 10-year span, 2006–2015, we carried out targeted radio observations at 400/800 MHz with Arecibo, and searched for radio pulsations from the quiescent SXT 1H 1905+000. None of the observations have revealed radio pulsations from the targeted SXT. For a 1 ms pulsar, our flux density upper limit is 10.3 μ Jy. At an assumed distance of 10 kpc this translates to a pseudo-luminosity upper limit of 1.0 mJy kpc², which makes our search complete to ∼85% of the known MSP population. Given the high sensitivity, and the generally large beaming fraction of millisecond pulsars, we conclude that SXT 1H 1905+000 is unlikely to emit in radio as a tMSP.

[en] New socio-economic conditions for the development of Russia dictate new requirements for the protection of buildings, equipment and personnel of various facilities from fires and their consequences. In complex fire extinguishing systems, the timeliness of fire detection and the effectiveness of extinguishing is the key to preserving material values and human lives. An urgent task is not only the improvement of existing fire extinguishing systems, but also the development of new systems, the basis of which is based on previously unused approaches. These approaches are based both on the previously known physical and chemical methods of extinguishing fires, and on the methods being investigated and studied at present. One of the promising methods of extinguishing fires is the technology of extinguishing fires using the effect of an electromagnetic field on the diffusion flame. The study of this method involves the analysis of physical processes that are electromagnetic in nature of interaction occurring in the system “diffusion flame torch - electromagnetic wave”. In this work, a quantitative analysis of the parameters affecting the possible mechanisms of interaction of the elements of this system is carried out. A mathematical model of the considered physical processes is presented. (paper)

[en] The space-time structure at hadronization was studied within the new EPOS model using femtoscopical methods. The results of the study were compared with the STAR HBT data for AuAu collision, as well as first ALICE HBT data for pp collisions. The model-predicted m_T and centrality dependence of R_out, R_side and R_long femtoscopy parameters were found to be in accordance with the STAR data

[en] We report preliminary data on proton-lambda correlations at small relative momentum q in the e³He(⁴He) ^→ e'pΛX reaction at E₀ = 4.7(4.46) GeV using the CLAS detector at Jefferson Lab. The enhancement of the correlation function at small q was found to be in qualitative agreement with theoretical expectations. The size of emission region about 1.5 fm was estimated using Lednicky-Lyuboshitz analytical model. The experimental correlation function is comparable with the P-matrix fit of the hyperon-nucleon data. Small-relative-momentum-proton-lambda correlations both for ³He(⁴He) target and for electroproduction reaction were studied for the first time.

[en] The space-time structure at hadronization was studied within new EPOS model using femtoscopical methods. The results of the study was compared with the STAR HBT data for AuAu collision and first ALICE HBT data for pp collisions. The model predicted mT and centrality dependence of R_out, R_side and R_long femtoscopy parameters were found to be in accordance with the STAR data.

[en] In pp scattering at 900 GeV, large numbers of elementary scatterings will contribute significantly, and the corresponding high-multiplicity events will be of particular interest. Elementary scatterings are parton ladders, identified with color flux tubes. In high-multiplicity events, many of these flux tubes are produced in the same space region, creating high-energy densities. We argue that there are good reasons to employ the successful procedure used for heavy-ion collisions: Matter is assumed to thermalize quickly, such that the energy from the flux tubes can be taken as an initial condition for a hydrodynamic expansion. This scenario gets spectacular support from very recent results on Bose-Einstein correlations in pp scattering at 900 GeV at LHC.

[en] We present a sophisticated treatment of the hydrodynamic evolution of ultrarelativistic heavy ion collisions, based on the following features: initial conditions obtained from a flux tube approach, compatible with the string model and the color glass condensate picture; an event-by-event procedure, taking into the account the highly irregular space structure of single events, being experimentally visible via so-called ridge structures in two-particle correlations; the use of an efficient code for solving the hydrodynamic equations in 3+1 dimensions, including the conservation of baryon number, strangeness, and electric charge; the employment of a realistic equation of state, compatible with lattice gauge results; the use of a complete hadron resonance table, making our calculations compatible with the results from statistical models; and a hadronic cascade procedure after hadronization from the thermal matter at an early time.

[en] Since 2010 the CMD-3 detector has been collecting data at the e⁺e⁻ collider VEPP-2000 at Budker Institute of Nuclear Physics. CMD-3 is a general purpose detector designed to study e⁺e⁻ annihilation into hadrons in the wide energy range √s = 0.3−2GeV. The barrel electromagnetic calorimeter of the detector has a thickness equal to 13.5X₀ and consists of two subsystems: closest to the beam pipe is the Liquid Xenon calorimeter (LXe) and the outer one is based on CsI scintillation crystals (CsI). The design of the LXe calorimeter and its current performance are presented