Results for "Yu. B. Ivanov"

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Alternative Scenarios of Relativistic Heavy-Ion Collisions: II. Particle ProductionApr 05 2013Jun 04 2013Particle production in relativistic collisions of heavy nuclei is analyzed in a wide range of incident energies 2.7 GeV $\le \sqrt{s_{NN}}\le$ 62.4 GeV. The analysis is performed within the three-fluid model employing three different equations of state ... More
Alternative Scenarios of Relativistic Heavy-Ion Collisions: III. Transverse Momentum SpectraNov 01 2013Jan 22 2014Transverse-mass spectra, their inverse slopes and mean transverse masses in relativistic collisions of heavy nuclei are analyzed in a wide range of incident energies 2.7 GeV $\le \sqrt{s_{NN}}\le$ 39 GeV. The analysis is performed within the three-fluid ... More
Baryon Stopping as a Probe of Deconfinement Onset in Relativistic Heavy-Ion CollisionsNov 12 2012Feb 21 2013It is argued that an irregularity in the baryon stopping is a natural consequence of a phase transition occurring in the compression stage of a nuclear collision. It is a combined effect of the softest point inherent in an equation of state (EoS) with ... More
Baryon stopping as a signal of the mixed phase onsetJan 11 2011It is argued that the experimentally observed baryon stopping indicates a non-monotonous behaviour as a function of the incident energy of colliding nuclei. This can be quantified by a midrapidity reduced curvature of the net-proton rapidity spectrum ... More
Phase Evolution and Freeze-out within Alternative Scenarios of Relativistic Heavy-Ion CollisionsJun 05 2013Sep 18 2013Global evolution of the matter in relativistic collisions of heavy nuclei and the resulting global freeze-out parameters are analyzed in a wide range of incident energies 2.7 GeV $\le \sqrt{s_{NN}}\le$ 39 GeV. The analysis is performed within the three-fluid ... More
Baryon Stopping in Heavy-Ion Collisions at E_{lab}= 2--160 GeV/nucleonJan 05 2010May 25 2010It is argued that the experimentally observed baryon stopping may indicate (within the present experimental uncertainties) a non-monotonous behaviour as a function of the incident energy of colliding nuclei. This can be quantified by a midrapidity reduced ... More
Elliptic Flow of Protons and Antiprotons in Au+Au Collisions at $\sqrt{s_{NN}}$ = 7.7--62.4 GeV within Alternative Scenarios of Three-Fluid DynamicsApr 08 2013Analysis of elliptic flow of protons and antiprotons in Au+Au collisions is performed in a wide range of incident energies $\sqrt{s_{NN}}$ = 7.7--62.4 GeV. Simulations has been done within the three-fluid model employing a purely hadronic equation of ... More
Baryon stopping signal for mixed phase formation in HICSep 23 2015It is argued that an irregularity in the baryon stopping is a natural consequence of onset of deconfinement occurring in the compression stage of a nuclear collision. It is an effect of the softest point inherent in an equation of state (EoS) with a deconfinement ... More
Alternative Scenarios of Relativistic Heavy-Ion Collisions: I. Baryon StoppingFeb 23 2013Simulations of relativistic heavy-ion collisions within the three-fluid model employing a purely hadronic equation of state (EoS) and two versions of the EoS involving deconfinement transition are presented. The latter are an EoS with the first-order ... More
Robustness of the Baryon-Stopping Signal for the Onset of Deconfinement in Relativistic Heavy-Ion CollisionsApr 15 2015May 28 2015The impact of the experimental acceptance, i.e. transverse-momentum ($p_T$) cut-off and limited rapidity region, on the earlier predicted irregularity in the excitation function of the baryon stopping is studied. This irregularity is a consequence of ... More
Transverse-Mass Effective Temperature in Heavy-Ion Collisions from AGS to SPSJul 31 2006Mar 10 2008Transverse-mass spectra in Au+Au and Pb+Pb collisions in incident energy range from 2A to 160A GeV are analyzed within the model of 3-fluid dynamics. It is shown that dynamical description of freeze-out, accepted in this model, naturally explains the ... More
Entropy Production and Effective Viscosity in Heavy-Ion CollisionsMay 09 2016Nov 24 2016Entropy production and an effective viscosity in central Au+Au collisions are estimated in a wide range of incident energies 3.3 GeV $\le \sqrt{s_{NN}}\le$ 39 GeV. The simulations are performed within a three-fluid model employing three different equations ... More
Elliptic Flow in Heavy-Ion Collisions at Energies $\sqrt{s_{NN}}=$ 2.7--39 GeVJan 10 2014Feb 27 2015The transverse-momentum integrated elliptic flow of charged particles at midrapidity, $v_2$(charged), and that of identified hadrons from Au+Au collisions are computed in a wide range of incident energies 2.7 GeV $\le \sqrt{s_{NN}}\le$ 39 GeV. The simulations ... More
Entropy Production and Effective Viscosity in Heavy-Ion CollisionsMay 09 2016Entropy production and an effective viscosity in central Au+Au collisions are estimated in a wide range of incident energies 3.3 GeV $\le \sqrt{s_{NN}}\le$ 39 GeV. The simulations are performed within a three-fluid model employing three different equations ... More
Magnetic vortex as a ground state for sub-micron antiferromagnetic particlesMay 12 2009Jul 12 2009For submicron particles shaped as any axisymmetric body and made with standard canted antiferromagnet like hematite or iron borate, the ground state may comprise of a magnetic vortex with topologically non-trivial distribution of the sublattice magnetization ... More
Estimates of the baryon densities attainable in heavy-ion collisions from the beam energy scan programMar 29 2018Jul 17 2018The baryon and energy densities attained in fragmentation regions in central Au+Au collisions in the energy range of the Beam Energy Scan (BES) program at the Relativistic Heavy-Ion Collider (RHIC) are estimated within the model of the three-fluid dynamics. ... More
Collective Flow in Heavy-Ion Collisions from AGS to SPSJun 05 2006Aug 08 2006Collective transverse flow in heavy-ion collisions at incident energies E_{lab} = (1 -160)A GeV is analyzed within the model of 3-fluid dynamics (3FD). Simulations are performed with purely hadronic equation of state (EoS). At the AGS energies the flow ... More
Vortex rings in fragmentation regions in heavy-ion collisions at $\sqrt{s_{NN}}=$ 39 GeVMar 05 2018May 03 2018Vorticity generated in heavy-ion collisions at energy of $\sqrt{s_{NN}}=$ 39 GeV is studied. Simulations are performed within a model of the three-fluid dynamics. A peculiar structure consisting of two vortex rings is found: one ring in the target fragmentation ... More
Light fragment production at CERN Super Proton SynchrotronMar 15 2017Oct 25 2017Recent data on the deutron and $^3$He production in central Pb+Pb collisions at the CERN Super Proton Synchrotron (SPS) energies measured by the NA49 collaboration are analyzed within the model of the three-fluid dynamics (3FD) complemented by the coalescence ... More
Abrikosov vortex lattice nonlinear dynamics and its stability in the presence of weak defectsJan 31 2002Abrikosov vortex lattice dynamics in a superconductor with weak defects is studied taking into account gyroscopic (Hall) properties. It is demonstrated that interaction of the moving lattice with weak defects results in appearance of the additional drag ... More
Instability Criteria for Vibrations of a Vortex Subject to a Gyro-forceMar 21 2004Here we study the instability of the vortex motion caused by vortex velocity non-monotonous dependence of the friction force in the presence of a gyro-force. We demonstrate that even a weak gyro-force renders the condition for onset of instability more ... More
Estimation of the Shear Viscosity from 3FD Simulations of Au+Au Collisions at $\sqrt{s_{NN}}=$ 3.3--39 GeVApr 12 2016An effective shear viscosity in central Au+Au collisions is estimated in the range of incident energies 3.3 GeV $\le \sqrt{s_{NN}}\le$ 39 GeV. The simulations are performed within a three-fluid model employing three different equations of state with and ... More
Non-Equilibrium 2PI Potential and Its Possible Application to Evaluation of Bulk ViscosityJul 15 2013Jul 18 2013Within non-equilibrium Green's function technique on the real-time contour and the two-particle-irreducable (2PI) $\Phi$-functional method, a non-equilibrium potential is introduced. It naturally generalizes the conventional thermodynamic potential with ... More
Transverse-Mass Spectra in Heavy-Ion Collisions at energies E_{lab} = 2--160 GeV/nucleonSep 05 2008Nov 18 2008Transverse-mass spectra of protons, pions and kaons produced in collisions of heavy nuclei are analyzed within the model of 3-fluid dynamics. It was demonstrated that this model consistently reproduces these spectra in wide ranges of incident energies ... More
Bulk Properties of the Matter Produced at Energies of the Beam Energy Scan ProgramJan 05 2018Feb 16 2018Recent STAR data on the bulk observables in the energy range of the Beam-Energy Scan Program at the Relativistic Heavy-Ion Collider are analyzed within the model of the three-fluid dynamics (3FD). The simulations are performed with different equations ... More
High baryon and energy densities achievable in heavy-ion collisions at $\sqrt{s_{NN}}=$ 39 GeVNov 08 2017Feb 14 2018Baryon and energy densities, which are reached in central Au+Au collisions at collision energy of $\sqrt{s_{NN}}= 39$ GeV, are estimated within the model of three-fluid dynamics. It is shown that the initial thermalized mean proper baryon and energy densities ... More
What can we learn from the directed flow in heavy-ion collisions at BES RHIC energies?Jan 15 2016Analysis of directed flow ($v_1$) of protons, antiprotons and pions in heavy-ion collisions is performed in the range of collision energies $\sqrt{s_{NN}}$ = 2.7--39 GeV. Simulations have been done within a three-fluid model employing a purely hadronic ... More
Nonlocal Form of Quantum Off-Shell Kinetic EquationJan 09 2009A new nonlocal form of the off-shell kinetic equation is derived. While being equivalent to the Kadanoff--Baym and Botermans--Malfliet formulations in the range of formal applicability, it has certain advantages beyond this range. It possesses more accurate ... More
On freeze-out problem in relativistic hydrodynamicsOct 13 2008Dec 07 2008A finite unbound system which is equilibrium in one reference frame is in general nonequilibrium in another frame. This is a consequence of the relative character of the time synchronization in the relativistic physics. This puzzle was a prime motivation ... More
What we have learned so far from 3-fluid hydrodynamicsOct 19 2007Nov 14 2007Available data on heavy-ion collisions at AGS and SPS energies are analyzed using a 3-fluid dynamical model within a purely hadronic scenario. We investigate the problems met in reproducing these data within this scheme. In particular, we try to indicate ... More
Vorticity in heavy-ion collisions at the JINR Nuclotron-based Ion Collider fAcilityJan 05 2017May 25 2017Vorticity of matter generated in noncentral heavy-ion collisions at energies of the Nuclotron-based Ion Collider fAcility (NICA) at the Joint Institute for Nuclear Research (JINR) in Dubna is studied. Simulations are performed within the model of the ... More
Dynamical Freeze-out in 3-Fluid HydrodynamicsNov 27 2006Oct 19 2007Freeze-out procedure accepted in the model of 3-fluid dynamics (3FD) is analyzed. This procedure is formulated in terms of drain terms in hydrodynamic equations. Dynamics of the freeze-out is illustrated by 1-dimensional simulations. It is demonstrated ... More
Gapless Hartree-Fock Resummation Scheme for the O(N) ModelFeb 16 2005May 11 2005A modified selfconsistent Hartree-Fock approximation to the lambda*phi^4 theory with spontaneously broken O(N) symmetry is proposed. It preserves all the desirable features, like conservation laws and thermodynamic consistency, of the selfconsistent Dyson ... More
Directed Flow Indicates a Crossover Deconfinement Transition in Relativistic Nuclear CollisionsDec 04 2014Feb 27 2015Analysis of directed flow ($v_1$) of protons, antiprotons and pions in heavy-ion collisions is performed in the range of incident energies $\sqrt{s_{NN}}$ = 2.7--27 GeV. Simulations have been done within a three-fluid model employing a purely hadronic ... More
Discommensurational and Inhomogeneous States Induced by a Strong Magnetic Field in Low-Dimensional AntiferromagnetsJun 24 2003Anisotropic antiferromagnetic systems of dimensionality greater than one in an external field are shown to exhibit a complicated array of ground states depending on the spin structure of the surface. The simplest structure that exhibits these effects ... More
GPDs in heavy meson production and Compton scatteringJan 27 2016Exclusive processes of heavy meson production and spacelike and timelike deeply virtual Compton scattering allow us to investigate the hadron structure in terms of Generalized Parton Distributions (GPDs). We review recent developments in the NLO description ... More
Self-consistent Approach to Off-Shell TransportMar 03 2003Mar 11 2003The properties of two forms of the gradient expanded Kadanoff--Baym equations, i.e. the Kadanoff--Baym and Botermans-Malfliet forms, suitable to describe the transport dynamics of particles and resonances with broad spectral widths, are discussed in context ... More
Towards a Quantum Transport Description of Particles with finite Mass WidthSep 16 1998Nov 27 1998The effects of the propagation of particles which have a finite life time and an according width in their mass spectrum are discussed in the context of transport descriptions. In the first part the coupling of soft photon modes to a source of charged ... More
Resonance Transport and Kinetic EntropyMay 14 1999Within the real-time formulation of nonequilibrium field theory, generalized transport equations are derived avoiding the standard quasiparticle approximation. They permit to include unstable particles into the transport scheme. In order to achieve a ... More
Estimates of hyperon polarization in heavy-ion collisions at collision energies $\sqrt{s_{NN}}=$ 4--40 GeVMar 13 2019Mar 18 2019Global polarization of $\Lambda$ and $\bar{\Lambda}$ hyperons in Au+Au collisions at collision energies $\sqrt{s_{NN}}=$ 4-40 GeV in the midrapidity region and total polarization, i.e. averaged over all rapidities, are studied within the scope of the ... More
Collective modes for an array of magnetic dots in the vortex stateAug 29 2006The dispersion relations for collective magnon modes for square-planar arrays of vortex-state magnetic dots, having closure magnetic flux are calculated. The array dots have no direct contact between each other, and the sole source of their interaction ... More
Mueller-Navelet jets in high-energy hadron collisionsSep 27 2012We consider within QCD collinear factorization the process $p+p\to {\rm jet} +{\rm jet} +X$, where two forward high-$p_T$ jets are produced with a large separation in rapidity $\Delta y$ (Mueller-Navelet jets [1]). The hard part of the reaction receives ... More
Probing Transversity in Electroproduction of Two Vector MesonsJan 21 2004Electroproduction of two vector mesons with a large rapidity gap between them provides the first feasible selective access to chiral-odd GPDs. The scattering amplitude of the process $ \gamma ^* N \to \rho_L^0 \rho_T^+ N'$ may be represented as a convolution ... More
Diffractive electroproduction of two mesons separated by a large rapidity gapJul 07 2003We consider the process gamma^* N -> M_1 M_2 N' with a large rapidity gap between the two mesons M_1 and M_2. Within the QCD collinear approximation, the scattering amplitude may be written as a convolution of an impact factor describing the gamma^* -> ... More
Elastic scattering of virtual photons via quark loop in Double-Logarithmic ApproximationAug 04 2017Mar 20 2018We calculate the amplitude of elastic photon-photon scattering via a single quark loop in the Double-Logarithmic Approximation, presuming all external photons to be off-shell and unpolarized.. At the same time we account for the running coupling effects. ... More
Dynamics of Resonances in Strongly Interacting SystemsDec 12 2005The effects of the propagation of particles which have a finite life-time and an according broad distribution in their mass spectrum are discussed in the context of a transport descriptions. In the first part some example cases of mesonic modes in nuclear ... More
Vector meson production in ultra-peripheral collisions at LHCJun 11 2007Vector meson production in ultra-peripheral collisions of heavy ions at LHC is calculated in VDM and color dipole approaches.
Relativistic Heavy-Ion Collisions within 3-Fluid Hydrodynamics: Hadronic ScenarioMar 31 2005Mar 15 2006A 3-fluid hydrodynamic model for simulating relativistic heavy-ion collisions is introduced. Alongside with two baryon-rich fluids, the new model considers time-delayed evolution of a third, baryon-free (i.e. with zero net baryonic charge) fluid of newly ... More
Equation of state of deconfined matter within dynamical quasiparticle descriptionOct 08 2004Dec 13 2004A simple quasiparticle model, motivated by lowest-order perturbative QCD, is proposed. It is applied to interpret the lattice QCD equation of state. A reasonable reproduction of the lattice data is obtained. In contrast to existing quasiparticle models, ... More
Exact Conservation Laws of the Gradient Expanded Kadanoff-Baym EquationsFeb 19 2001It is shown that the Kadanoff-Baym equations at consistent first-order gradient approximation reveal exact rather than approximate conservation laws related to global symmetries of the system. The conserved currents and energy-momentum tensor coincide ... More
Probing GPDs in photoproduction processes at hadron collidersOct 22 2015Generalized parton distributions (GPDs) enter QCD factorization theorems for hard exclusive reactions. They encode rich information about hadron partonic structure. We explore a possibility to constrain GPDs in experiments at LHC considering two different ... More
Estimates of hyperon polarization in heavy-ion collisions at collision energies $\sqrt{s_{NN}}=$ 4--40 GeVMar 13 2019Global polarization of $\Lambda$ and $\bar{\Lambda}$ hyperons in Au+Au collisions at collision energies $\sqrt{s_{NN}}=$ 4-40 GeV in the midrapidity region and total polarization, i.e. averaged over all rapidities, are studied within the scope of the ... More
Renormalization of a gapless Hartree-Fock approximation to a theory with spontaneously broken O(N)-symmetryJun 16 2005Aug 09 2005The renormalization of a gapless Phi-derivable Hartree--Fock approximation to the O(N)-symmetric lambda*phi^4 theory is considered in the spontaneously broken phase. This kind of approach was proposed by three of us in a previous paper in order to preserve ... More
On the ground states of an array of magnetic dots in the vortex state and subject to a normal magnetic fieldNov 12 2001Dipole-dipole interactions in a square planar array of sub-micron magnetic disks (magnetic dots) have been studied theoretically. Under a normal magnetic field the ground-state of the array undergoes many structural transitions between the limiting chessboard ... More
Spin nematic state for a spin S=3/2 isotropic non-Heisenberg magnetJul 26 2009$S=3/2$ system with general isotropic nearest-neighbor exchange within a mean-field approximation possesses a magnetically ordered ferromagnetic state and antiferromagnetic state, and two different spin nematic states, with zero spin expectation values. ... More
Prompt Contributions to the Dilepton Yield in Heavy Ion CollisionsNov 18 1999Feb 22 2000The mass spectrum is calculated for those dileptons which are produced in the early phase of a heavy ion collisions via the direct production NN -> (l^+)(l^-)X and via the Compton process GN -> (l^+)(l^-)X with prompt gluons radiated in preceding NN interactions. ... More
Self-Consistent Approximations to Non-Equilibrium Many-Body TheoryJul 13 1998Within the non-equilibrium Green's function technique on the real time contour, the Phi-functional method of Baym is reviewed and generalized to arbitrary non-equilibrium many-particle systems. The scheme may be closed at any desired order in the number ... More
Solitons in isotropic antiferromagnets: beyond a sigma modelDec 01 2007Isotropic antiferromagnets shows a reach variety of magnetic solitons with non-trivial static and dynamic properties. One-dimensional soliton elementary excitations have a periodic dispersion law. For two-dimensional case, planar antiferromagnetic vortices ... More
Probing GPDs in Ultraperipheral CollisionsNov 13 2014Ultraperipheral collisions in hadron colliders give new opportunites to investigate the hadron stucture through exclusive photoproduction processes. We describe the possibility of measuring the Generalized Parton Distributions in the Timelike Compton ... More
Probing chiral-odd GPD's in diffractive electroproduction of two vector mesonsSep 25 2002Nov 13 2002We consider the electroproduction of two vector mesons with a large rapidity gap between them on a nucleon target in the process $ \gamma ^* N \to \rho_1 \rho_2 N'$. We calculate the Born term for this process within the collinear factorization framework. ... More
Incoherent quantum feedback control of collective light scattering by Bose-Einstein condensatesJan 10 2016It is well known that in the presence of a ring cavity the light scattering from a uniform atomic ensemble can become unstable resulting in the collective atomic recoil lasing. This is the result of a positive feedback due to the cavity. We propose to ... More
Diffractive light vector meson production at large momentum transfersAug 17 1995Aug 18 1995The diffractive process $\gamma^*(Q^2) p\to V+X$ (where $V= \rho^0, \omega , \phi$ are the vector mesons, consisted of light quarks, $X$ represents the hadrons to that a proton dissociates) is studied. We consider the region of large momentum transfers, ... More
Exclusive production of dijets in QCDSep 30 2002We study in a framework of QCD collinear factorization the processes of a pion and a photon diffraction dissociation into two jets. The structure of non-factorizable contributions is discussed. We argue that coherent production of hard dijets by linearly ... More
QCD Factorization for the Pion Diffractive Dissociation Into Two JetsJul 26 2002We report a detailed study of the process of pion diffraction dissociation into two jets with large transverse momenta. We find that the standard collinear factorization does not hold in this reaction. The structure of non-factorizable contributions is ... More
Diffractive Dissociation into Two JetsMay 12 2003We report a study of the processes of coherent a pion and a photon diffraction dissociation into two jets. The structure of non-factorizable contributions in these reactions is discussed. We argue that production of hard dijets by real photons can provide ... More
Exclusive vector meson electroproductionDec 19 2007We discuss exclusive vector meson electroproduction within the QCD collinear factorization framework. In Bjorken kinematics the amplitude factorizes in a convolution of the nonperturbative meson distribution amplitude and the generalized parton densities ... More
Non-linear dynamics and two-dimensional solitons for spin $ S=1$ ferromagnets with biquadratic exchangeNov 27 2007We develop a consistent semiclassical theory of spin dynamics for an isotropic ferromagnet with a spin $ S=1$ taking into consideration both bilinear and biquadratic over spin operators exchange interaction. For such non-Heisenberg magnets, a peculiar ... More
Light vector meson photoproduction at high $|t|$Jun 10 2000Nov 10 2000We have studied in perturbative QCD all independent helicity amplitudes describing the photoproduction of light vector mesons at large $t$. We found a new hard production mechanism which is related to the possibility for a real photon to fluctuate into ... More
Magnetoresistance of monolayer graphene with short-range scatteringAug 17 2015We present magnetotransport measurements at classical magnetic fields for three graphene monolayers with various levels of disorder. A square root magnetoresistance (SRMR) behavior is observed in one sample which has the characteristic sub-linear conductivity ... More
Influence of disordered edges on transport properties in grapheneMay 11 2016The influence of plasma etched sample edges on electrical transport and doping is studied. Through electrical transport measurements the overall doping and mobility are analyzed for mono- and bilayer graphene samples. As a result the edge contributes ... More
Inertial longitudinal magnetization reversal for non-Heisenberg ferromagnetsJun 05 2013Jun 30 2013We analyze theoretically the novel pathway of ultrafast spin dynamics for ferromagnets with high enough single-ion anisotropy (non-Heisenberg ferromagnets). This longitudinal spin dynamics includes the coupled oscillations of the modulus of the magnetization ... More
Optical and magnetic properties of ZnCoO layersAug 09 2013Optical and magneto-optical properties of ZnCoO films grown at low temperature by Atomic Layer Deposition are discussed. Strong wide band absorption, with onset at about 2.4 eV, is observed in ZnCoO in addition to Co-related intra-shell transitions. This ... More
On high energy exclusive leptoproduction of the rho meson up to twist 3Sep 23 2011The Regge inspired k_T-factorization scheme expresses the scattering amplitude for exclusive leptoproduction of a light vector meson rho in terms of two impact factors, one for the gamma* - rho transition and the other one for the nucleon to nucleon transition, ... More
Theory and phenomenology of helicity amplitudes for high energy exclusive leptoproduction of the rho-mesonJul 10 2012We review here two approaches to describe hard leptoproduction of transversally polarized rho-meson, based on recent calculation of the gamma*T -> rhoT impact factor up to twist 3 accuracy in the collinear factorization frame, including 2- and 3- particles ... More
Exclusive electroproduction of rhoT meson with twist three accuracyNov 08 2010Exclusive electroproduction of vector mesons is a crucial way to probe QCD factorization properties. Such a factorization is up to now only proven, at the twist 2 level, for a longitudinaly polarized meson. It is crucial to extend our understanding to ... More
Hard diffractive processes and non-perturbative matrix elements beyond leading twist: rhoT-meson productionSep 22 2009Sep 22 2009Within the kt-factorization approach, we evaluate the impact factor of the transition gamma* -> rhoT taking into account the twist 3 contributions. We show that a gauge invariant expression is obtained with the help of QCD equations of motion. More generally, ... More
Elliptic Flow and Dissipation in Heavy-Ion Collisions at E_{lab} = (1--160)A GeVJul 23 2009Nov 24 2009Elliptic flow in heavy-ion collisions at incident energies $E_{lab}\simeq$ (1--160)A GeV is analyzed within the model of 3-fluid dynamics (3FD). We show that a simple correction factor, taking into account dissipative affects, allows us to adjust the ... More
Electroproduction of Charmonia off Protons and NucleiDec 20 2002Dec 20 2002Elastic virtual photoproduction of charmonia on nucleons is calculated in a parameter free way with the light-cone dipole formalism and the same input: factorization in impact parameters, light-cone wave functions for the photons and the charmonia, and ... More
Quark-antiquark resonances in the NJL modelMay 27 1997The problem of the $\rho$ meson resonance solution in the extended NJL model is studied. It has been shown previously that the solution for the $\rho$ meson changes smoothly from a bound state to a "virtual state" when the vector channel attraction becomes ... More
Color path-integral Monte-Carlo simulations of quark-gluon plasma: Thermodynamic and transport propertiesOct 09 2012Jan 29 2013Based on the quasiparticle model of the quark-gluon plasma (QGP), a color quantum path-integral Monte-Carlo (PIMC) method for calculation of thermodynamic properties and -- closely related to the latter -- a Wigner dynamics method for calculation of transport ... More
Efimov states in atom-molecular collisionsMay 25 2009We analyse scattering of a heavy atom off a weakly bound molecule comprising an identical heavy and a light atom in the Born-Oppenheimer approximation. We focus on the situation where the heavy atoms are bosons, which was realized in several experiments. ... More
Colliding beams of lightSep 12 2002Dec 28 2002The stationary gravitational field of two identical counter-moving beams of pure radiation is found in full generality. The solution depends on an arbitrary function and a parameter which sets the scale of the energy density. Some of its properties are ... More
Relativistic static fluid spheres with a linear equation of stateJul 10 2001It is shown that almost all known solutions of the kind mentioned in the title are easily derived in a unified manner when a simple ansatz is imposed on the metric. The Whittaker solution is an exception, replaced by a new solution with the same equation ... More
Static charged fluid spheres in general relativitySep 04 2001Interior perfect fluid solutions for the Reissner-Nordstrom metric are studied on the basis of a new classification scheme. It specifies which two of the fluid's characteristics are given functions and picks up accordingly one of the three main field ... More
Spin-wave series for quantum one-dimensional ferrimagnetsDec 01 1997Second-order spin-wave expansions are used to compute the ground-state energy and sublattice magnetizations of the quantum one-dimensional Heisenberg ferrimagnet with nearest-neighbor antiferromagnetic interactions and two types of alternating sublattice ... More
Directed flow in heavy-ion collisions and its implications for astrophysicsNov 08 2017Analysis of directed flow ($v_1$) of protons, antiprotons and pions in heavy-ion collisions is performed in the range of collision energies $\sqrt{s_{NN}}$ = 2.7--39 GeV. Simulations have been done within a three-fluid model employing a purely hadronic ... More
Behavior of bounded solutions of quasilinear elliptic equations on Riemannian manifoldsDec 09 2007Dec 12 2007This paper deals with bounded solutions of quasilinear elliptic equations on Riemannian manifolds satisfying special condition.
Ramified automorphic induction and zero-dimensional affine Deligne-Lusztig varietiesDec 23 2015To any connected reductive group G over a non-archimedean local field F (of characteristic p > 0) and to any maximal torus T of G, we attach a family of extended affine Deligne-Lusztig varieties (and families of torsors over them) over the residue field ... More
gamma* -> rhoT impact factor with twist three accuracyNov 14 2008We evaluate the impact factor of the transition gamma* -> rhoT taking into account the twist 3 contributions. We show that a gauge invariant expression is obtained with the help of QCD equations of motion. Our results are free of end-point singularities. ... More
Evolution of Baryon-Free Matter Produced in Relativistic Heavy-Ion CollisionsFeb 13 2003Dec 08 2003A 3-fluid hydrodynamic model is introduced for simulating heavy-ion collisions at incident energies between few and about 200 AGeV. In addition to the two baryon-rich fluids of 2-fluid models, the new model incorporates a third, baryon-free (i.e. with ... More
Photoproduction of Charmonia and Total Charmonium-Proton Cross SectionsJul 12 2000Jul 21 2000Elastic virtual photoproduction cross sections gamma^*p -> J/psi(psi')p and total charmonium-nucleon cross sections for J/psi, psi' and chi states are calculated in a parameter free way with the light-cone dipole formalism and the same input: factorization ... More
Soft Modes, Quantum Transport and Kinetic EntropyJan 31 2000The effects of the propagation of particles which have a finite life-time and an according width in their mass spectrum are discussed in the context of transport descriptions. In the first part the coupling of soft photon modes to a source of charged ... More
Color path-integral Monte Carlo simulations of quark-gluon plasmaMar 09 2012Thermodynamic properties of a strongly coupled quark-gluon plasma (QGP) of constituent quasiparticles are studied by a color path-integral Monte Carlo simulations (CPIMC). For our simulations we have presented QGP partition function in the form of color ... More
Collective modes for an array of magnetic dots with perpendicular magnetizationFeb 07 2010The dispersion relations of collective oscillations of the magnetic moment of magnetic dots arranged in square-planar arrays and having magnetic moments perpendicular to the array plane are calculated. The presence of the external magnetic field perpendicular ... More
QCD factorization of exclusive processes beyond leading twist: gamma*T -> rhoT impact factor with twist three accuracySep 22 2009Dec 23 2009We describe a consistent approach to factorization of scattering amplitudes for exclusive processes beyond the leading twist approximation. The method involves the Taylor expansion of the scattering amplitude in the momentum space around the dominant ... More
On the description of exclusive processes beyond the leading twist approximationMar 27 2009Nov 17 2009We describe hard exclusive processes beyond the leading twist approximation in a framework based on the Taylor expansion of the amplitude around the dominant light-cone directions. This naturally introduces an appropriate set of non-perturbative correlators ... More
QCD factorization beyond leading twist in exclusive processes: rhoT-meson productionSep 22 2009Feb 03 2010Exclusive processes in hard electroproduction is one of the best place for understanding the factorization properties of QCD. The HERA experiment recently provided precise data for rho electroproduction, including all spin density matrix elements. From ... More
QCD factorization beyond leading twist in exclusive rho(T) meson productionApr 09 2009We describe hard exclusive processes involving a transversally polarized rho meson in the twist 3 approximation, in a framework based on the Taylor expansion of the amplitude around the dominant light-cone direction.
Directed Flow of Baryons in Heavy-Ion CollisionsNov 01 2000The collective motion of nucleons from high-energy heavy-ion collisions is analyzed within a relativistic two-fluid model for different equations of state (EoS). As function of beam energy the theoretical slope parameter F_y of the differential directed ... More
Quantum simulations of thermodynamic properties of strongly coupled quark-gluon plasmaJan 11 2011A strongly coupled quark-gluon plasma (QGP) of heavy constituent quasi-particles is studied by a path-integral Monte-Carlo method. This approach is a quantum generalization of the model developed by Gelman, Shuryak and Zahed. It is shown that this method ... More