Equation of state of hadron resonance gas and the phase diagram of strongly interacting matter

The equation of state of hadron resonance gas at finite temperature and baryon density is calculated taking into account finite-size effects within the excluded volume model. Contributions of known hadrons with masses up to 2 GeV are included in the zero-width approximation. Special attention is paid to the role of strange hadrons in the system with zero total strangeness. A density- dependent mean field is added to guarantee that the nuclear matter has a saturation point and a liquid-gas phase transition. The deconfined phase is described by the bag model with lowest order perturbative corrections. The phase transition boundary is found by using the Gibbs conditions with the strangeness neutrality constraint. The sensitivity of the phase diagram to the hadronic excluded volume and to the parametrization of the mean-field is investigated. The possibility of strangeness-antistrangeness separation in the mixed phase is analyzed. It is demonstrated that the peaks in the kaon to pion and lambda to pion multiplicity ratios can be explained by a nonmonotonous behavior of the strangeness fugacity along the chemical freeze-out line.Comment: 40 pages, 31 figure

Exploring an Origin of the QCD Critical Endpoint

We discuss a new way to develop the exactly solvable model of the QCD critical endpoint by matching the deconfinement phase transition line for the system of quark-gluon bags with the line of their vanishing surface tension coefficient. In contrast to all previous findings in such models the deconfined phase is defined not by an essential singularity of the isobaric partition function, but by its simple pole. As a result we find out that the first order deconfinement phase transition which is defined by a discontinuity of the first derivative of system pressure is generated by a discontinuity of the derivative of surface tension coefficient.Comment: 5 pages, 2 figures, minor changes are mad

Transient response of a cylindrical cavity with and without a bonded shell in an infinite elastic medium

The solution is obtained for the transient response to a nontorsional surface load of an infinite. isotropic. elastic medium containing a cylindrical cavity with and without a thin elastic shell embedment using the Residual Variable Method. The main advantage of the present approach is that it eliminates the computational problems arising in the existing methods which are primarily based on the Fourier transformation technique. Numerical results for the displacements and stresses at different locations are presented for the case of a radial, Heaviside loading. (C) 1997 Elsevier Science Ltd

Transient response of an infinite elastic medium containing a spherical cavity with and without a shell embedment

The analytical solution is obtained for the transient response to an axisymmetric and non-torsional surface load of an infinite, isotropic, elastic medium containing a spherical cavity with and without a thin elastic shell embedment using the Residual Variable Method. The main advantage of the present approach is that it eliminates the computational problems arising in the existing methods which are primarily based on the Fourier transformation technique. Extensive numerical results for the displacements and stresses at different locations are presented graphically for the case of a radial, Heaviside loading. Copyright (C) 1997 Elsevier Science Ltd

Transient response of an infinite elastic medium containing a spherical cavity subjected to torsion

An exact closed-form solution is obtained for the transient response of an infinite isotropic elastic medium containing a spherical cavity subjected to torsional surface loading using the residual variable method. The main advantage of the present approach is that it eliminates the computational problems arising in the existing methods which are primarily based on Fourier or Laplace transformation techniques. Extensive numerical results for the circumferential displacements and shear stresses at various locations are presented graphically for Heaviside loadings

Propagation of waves from a spherical cavity with and without a shell embedment

A spherical cavity in an infinite, elastic medium with and without a shell embedment is subjected to axisymmetric, non-torsional surface loads in the radial and meridional directions. The so-called Residual Variable Method (RVM) is used to obtain exact, closed-form solutions of the wave propagation problems. Some representative numerical results are presented graphically for the stresses created in two realistic loading situations

Propagation of waves from a spherical cavity with and without a shell embedment

SIGLEAvailable from British Library Document Supply Centre-DSC:7648.05625(98-22) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Transient response of an infinite elastic medium containing a spherical cavity subjected to torsion

SIGLEAvailable from British Library Document Supply Centre-DSC:7648.05625(98-20) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Loaded elastic spherical cavity using the residual variable method

Paper presented at CIMASI' 2000 Workshop, Oct 23-25, Casablanca, MoroccoSIGLEAvailable from British Library Document Supply Centre-DSC:7648.05625(99-25) / BLDSC - British Library Document Supply CentreGBUnited Kingdo