117569877
Lepton-nucleon scattering in the relativistic oscillator model
The scattering of charged leptons by a system of three quarks locked in by a relativistic oscillator potential is considered. The calculations are performed in the rest frame of the target, which allows the derivation of the explicit x and Q/sup 2/ dependences of the nucleon structure functions F/sub 1/(x,Q/sup 2/) and F/sub 2/(x,Q/sup 2/) and the quantity R = sigma/sub L//sigma/sub T/ in the region of moderate Q/sup 2/ values.
117509698
QCD NUCLEON MODEL WITH RELATIVISTIC OSCILLATOR INTERACTION BETWEEN CONSTITUENT QUARK
115685349
TWO PARTICLE LEPTON - NUCLEON PROCESSES IN DUAL QCD APPROACH
615085
Nucleon structure as a background for determination of fundamental parameters.
We consider deep inelastic (quasi)elastic lepton-nucleon scattering and investigate the possibilities of eliminating or suppressing theoretical uncertainties induced by the nucleon structure in measuring the standard model parameters or in searching for new physics. On the basis of rather general assumptions about nucleon structure we have obtained new relations between cross sections and neutral current parameters which are weakly dependent on the nucleon structure. We also investigate the dependence of the QCD $\ensuremath{\Lambda}$ parameter extracted from the data on the unknown large-scale nucleon structure and propose a modification of the conventional QCD predictions in which the dependence on this uncertainty factor is suppressed.
182432079
SPECTRALITY OF GELL-MANN-LOW FUNCTION
896237
Electroproduction of charmonia off nuclei
In a recent publication we have calculated elastic charmonium production in ep collisions employing realistic charmonia wave functions and dipole cross sections and have found good agreement with the data in a wide range of s and Q^2. Using the ingredients from those calculations we calculate exclusive electroproduction of charmonia off nuclei. Here new effects become important, (i) color filtering of the c-cbar pair on its trajectory through nuclear matter, (ii) dependence on the finite lifetime of the c-cbar fluctuation (coherence length) and (iii) gluon shadowing in a nucleus compared to the one in a nucleon. Total coherent and incoherent cross sections for C, Cu and Pb as functions of s and Q^2 are presented together with some differential cross sections. The results can be tested with future electron-nucleus colliders or in peripheral collisions of ultrarelativistic heavy ions.
123789985
Relativistic mean field kinetics and dynamical instabilities in relativistic heavy ion collisions
121066263
Space-time picture of high-energy heavy-ion collisions and scaling properties of proton spectra
Abstract A comparative analysis of predictions of three typical models of relativistic nucleus-nucleus collisions is performed. It includes the model of partial transparency, the hydrodynamical model and the intranuclear cascade model. The results of proton and pion spectra calculations are compared with the experimental data available at incident energies of 0.8, 2.1 and 3.6 GeV nucleon . The effects of deviation from thermodynamical equilibrium due to mutual transparency of projectile and target nuclei are studied. The importance of the transition layer arising on the boundary of the overlapping parts of interacting nuclei has been demonstrated. The emission from this layer gives the main contribution to inclusive proton spectra in the target fragmentation region. In this region all the three models are in good agreement with experiment and, in particular, reproduce the scaling properties of proton inclusive cross sections satisfactorily. Considerable difference in the models' predictions takes place in the central rapidity region, especially in central collisions of identical nuclei. Experiments are suggested to study the mechanisms of the transition layer formation and the nature of scaling behaviour of proton spectra.
18368050
Equation of State of Strongly Coupled Quark–Gluon Plasma – Path Integral Monte Carlo Results
A strongly coupled plasma of quark and gluon quasiparticles at temperatures from 1.1Tc to 3Tc is studied by path integral Monte Carlo simulations. This method extends previous classical nonrelativistic simulations based on a color Coulomb interaction to the quantum regime. We present the equation of state and find good agreement with lattice results. Further, pair distribution functions and color correlation functions are computed indicating strong correlations and liquid-like behavior (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
125840079
Quantum Color Dynamic Simulations of the Strongly Coupled Quark-Gluon Plasma
A strongly coupled plasma of quark and gluon quasiparticles is studied by combination of Path integral Monte Carlo and quantum Wigner dynamics simulations. This method extends previous classical nonrelativistic simu-lations based on a color Coulomb interaction to the quantum regime. First results for the momentum-momentum autocorrelation function and diffusion constant are presented (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
120525462
Stochastic multi-fluid models for intermediate-energy heavy-ion collisions☆
Abstract The relativistic Boltzmann-Langevin equation is reduced to a stochastic multi-fluid model and the corresponding transport coefficients, i.e. the interflow friction force and the interflow diffusion tensor, are extracted. The model is applied to fluctuation phenomena in the equilibration process for two counter-streaming nuclear fluids.