117827292
Surface oscillations of a Fermi liquid
Abstract Surface oscillations of a normal Fermi liquid are considered within the framework of the Landau phenomenological theory of a Fermi liquid. A procedure for describing surface phenomena is formulated which is based on the self-consistent field kinetic equation involving successive separation of the surface parts of various characteristics of the liquid. Boundary conditions at the free surface are derived. An expression for the surface tension coefficient is obtained. Oscillations of a Fermi liquid under hydrodynamical and collisionless conditions are investigated and the density and current distributions in the presence of such oscillations are found. The role of system finiteness effects is discussed. It is concluded that weakly damped low-lying surface vibrations in nuclei exist only as a result of nuclear finiteness. The contribution of surface fluctuations to the free energy of a Fermi liquid is calculated. The analytic dependence of the surface tension coefficient upon the temperature is predicted in the low-temperature limit.
115321070
On the relationship between Boltzmann-Langevin and Boltzmann-Uehling-Uhlenbeck models
14791019
Lattice QCD constraints on hybrid and quark stars
A QCD-motivated dynamical-quasiparticle model with parameters adjusted to reproduce the lattice-QCD equation of state is extrapolated from the region of high temperatures and moderate baryonic densities to the domain of high baryonic densities and zero temperature. The resulting equation of state matched with realistic hadronic equations of state predicts a phase transition into the quark phase at higher densities than those reachable in neutron star interiors. This excludes the possibility of the existence of hybrid (hadron-quark) stars. Pure quark stars are possible and have low masses, small radii, and very high central densities. Similar results are obtained for a simple bag model with massive quarks, fitted to reproduce the same lattice results. Self-bound quark matter is also excluded within these models. Uncertainties in the present extrapolation are discussed. Comparison with standard bag models is made.
118142337
Partial-transparency effects in high-energy collisions of heavy ions
A model is proposed for heavy-ion collisions at E/sub lab/approx.1 GeV/nucleon for the case of an incomplete statistical equilibrium in the highly excited nuclear matter. This approach can reproduce the characteristic double-humped structure of the experimental rapidity distributions of secondary particles.
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)
195334493
Quantum simulations of strongly coupled quark-gluon plasma
A 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 classical molecular dynamics by Gelman, Shuryak, and Zahed. It is shown that this method is able to reproduce the QCD lattice equation of state. The results indicate that the QGP reveals liquid-like rather than gaslike properties. Quantum effects turned out to be of prime importance in these simulations.
118014393
QCD analysis of deep inelastic lepton-scattering data
We have carried out a QCD analysis of data on deep inelastic lepton-scattering (using data of the collaborations BCDMS, EMC, and CDHS) in the leading and next-to-leading orders in the coupling constant ..cap alpha../sub s/. We have considered the effect of the sea quarks and gluons. We discuss the dependence of our results for ..lambda.. on effects of twist corrections, nuclear target effects, and heavy-quark production thresholds.
182081169
PHOTON PROPAGATOR ASYMPTOTICS AT Q**2 ---> infinity IN THE SOURCE THEORY
124707884
The Decay $\tau \to 3 \pi \nu_\tau$ and Characteristics of $A1$ Meson
The phenomenological meson Lagrangian based on the four-quark interactions of the scalar, pseudoscalar, vector and axial-vector types is used for description of the decay τ−→π+π−π−vτ. The structure of the main hadronic vertexa 1 − ρπ is discussed. The expression for the axial hadronic currentJμ(a1→3π) is obtained. The low-energy limit of this current is analysed. Spectral functions for the main channel of the given process are calculated. The fitting of the experimental data leads to the following values of thea1 parameters: 
 
$$\begin{gathered} m_{a_1 } = 1242 \pm 37MeV,\Gamma _{a_1 } = 465_{ - 143}^{ + 228} MeV\left( {DELCO} \right); \hfill \\ \hfill \\ m_{a_1 } = 1260 \pm 14MeV,\Gamma _{a_1 } = 298_{ - 34}^{ + 40} MeV\left( {MARK II} \right); \hfill \\ \hfill \\ m_{a_1 } = 1250 \pm 9MeV,\Gamma _{a_1 } = 488 \pm 32MeV\left( {ARGUS} \right). \hfill \\ \end{gathered} $$
6453654
Photoproduction of charmonia and total charmonium proton cross-sections
Elastic virtual photoproduction cross sections ${\ensuremath{\gamma}}^{*}\stackrel{\ensuremath{\rightarrow}}{p}J/\ensuremath{\psi}({\ensuremath{\psi}}^{\ensuremath{'}})p$ and total charmonium-nucleon cross sections for $J/\ensuremath{\psi}, {\ensuremath{\psi}}^{\ensuremath{'}},$ and $\ensuremath{\chi}$ states are 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 ${\ensuremath{\gamma}}^{*}$ and the charmonia, and the universal phenomenological dipole cross section which is fitted to other data. The charmonium wave functions are calculated with four known realistic potentials, and two models for the dipole cross section are tested. Very good agreement with data for the cross section of charmonium photoproduction is found in a wide range of s and ${Q}^{2}.$ The inclusion of the Melosh spin rotation increases the ${\ensuremath{\psi}}^{\ensuremath{'}}$ photoproduction rate by a factor of 2\char21{}3 and removes previously observed discrepancies in the ${\ensuremath{\psi}}^{\ensuremath{'}}$ to $J/\ensuremath{\psi}$ ratio in photoproduction. We also calculate the charmonium-proton cross sections whose absolute values and energy dependences are found to correlate strongly with the sizes of the states.
126120440
Spectra Particles From $\Lambda_c^+$ and $\Sigma_c^{++}$ Charmed Baryon Decays Produced in Neutrino $N$ Interactions