119303548
Strange stars properties calculated in the framework of the Field Correlator Method
Abstract We calculate the strange star properties in the framework of the Field Correlator Method. We find that for gluon condensate values G 2 in the range 0.006 – 0.007 GeV 4 , which give a critical temperature T c ∼ 170 MeV at μ c = 0 , the sequences of strange stars are compatible with some of the semi-empirical mass–radius relations and data obtained from astrophysical observations.
18756117
Gravitational Collapse of a Massless Scalar Field and a Perfect Fluid with Self-Similarity of the First Kind in (2+1) Dimensions
Self-similar solutions of a collapsing perfect fluid and a massless scalar field with kinematic selfsimilarity of the first kind in 2+1 dimensions are obtained. Their local and global properties of the solutions are studied. It is found that some of them represent gravitational collapse, in which black holes are always formed, and some may be interpreted as representing cosmological models.
14001752
Model of the stochastic vacuum and QCD parameters
Abstract Accounting for the two independent correlation functions of the QCD vacuum, we improve the simple and consistent description given by the model of the stochastic vacuum to the high-energy pp and p p data, with a new determination of parameters of non-perturbative QCD. The increase of the hadronic radii with the energy accounts for the energy dependence of the observables.
122126281
QCD field correlations in high-energy scattering
The two independent correlation functions describing nonperturbative properties of the QCD vacuum are taken into account in the evaluation of the observables of soft high-energy hadron-hadron scattering. The model of the stochastic vacuum provides the framework in which a simple and effective description of the high-energy pp and {bar p}p data can be given, leading to a determination of relevant parameters of nonperturbative QCD and to a good description of the data. The ratio between the non-Abelian and the Abelian parts of the field correlations is studied in terms only of high-energy data and the results are compared to lattice calculations. It is shown that a slow increase of the hadronic radii with the energy accounts for the energy dependence of all observables. {copyright} {ital 1997} {ital The American Physical Society}
120073885
A NUCLEAR MANY-BODY THEORY WITH TSALLIS STATISTICS
121552592
On the determination of observables in πd scattering
The authors exploit the possibilities of determination of dynamical observables in πd elastic scattering offered by the availability of vector and tensor polarised targets, showing that several observables not yet measured may be made accessible to experimental measurement. They present the results of calculations of the observables i(11 mod 20)lab, t22 and T21, showing their importance for the distinction between different Faddeev calculations and for the study of the Delta N interaction.
121932121
THCOBRA: Ion back flow reduction in patterned THGEM cascades
A new concept for avalanche ion back-flow (IBF) reduction in cascaded gaseous detectors is presented. The Thick-COBRA is a Thick-GEM (THGEM) with a patterned electrode, aiming at reducing secondary effects by trapping avalanche ions. The patterned electrode faces the electron drift region, trapping ions flowing back from the cascaded multiplier and those produced within the Thick-COBRA. Total IBF values of about 5% were obtained, about six times below that reached with a THGEM in a triple-THGEM configuration, keeping full single-electron detection efficiency. Experimental and simulation studies of IBF and electron collection/transmission efficiencies are presented; the suitability for application of Thick-COBRA in photon detectors for RICH is discussed.