13536192
Strangeness abundance as a signal for quark-gluon plasma.
We suggest that the variation of the ratio {ital n}{sub {ital K}{sup +}}/{ital n}{sub K{sup {minus}}} and {ital n}{sub {phi}}/{ital n}{sub {omega}} with baryon density (or rapidity) and/or with temperature should be studied in ultrarelativistic heavy-ion collisions and a change in the variation of these production ratios can be utilized to separate the quark-gluon-plasma contributions from the hadronic background.
120728280
Rescattering effects in three-particle final-state reactions
The phenomenological aspect of single-pion production in ..pi../sup -/p interaction is explored by considering the final-state interactions in a rescattering box-diagram approach. We predict the qualitative and the quantitative features expected from our model in angular and momentum distributions of final pions. The preliminary data available so far appear to support our theoretical predictions.
120005715
Signals of quark-gluon plasma
Abstract Production and observation of a quark-gluon plasma (QGP) is one of the most ambitious goals of the ultrarelativistic heavy ion experiments being carried out at CERN's super proton synchrotron (SPS) and at Brookhaven's Alternating Gradient Synchrotron (AGS). Future experiments at Brookhaven's Relativistic Heavy Ion Collider (RHIC) and at CERN's Large Hadron Collider (LHC) will give a new dimension to this search. In this review, the physics of QGP is presented with particular emphasis on its promising signatures existing in the literature. We hope that the present survey will lead us to identify some unambiguous signatures of QGP before the advent of RHIC and LHC experiments.
115391521
QUARK GLUON PLASMA : CURRENT STATUS OF PROPERTIES AND SIGNALS
119366615
Anisotropic Bianchi Type-II Cosmological Models in Self-Creation Cosmology
Totally anisotropic Bianchi type-II cosmological solutions are presented in Barber's second self-creation theory of gravitation both in vacuum and in the presence of stiff-matter. The corresponding cosmological models have no finite singularity. The stiff-matter model gives essentially an empty universe for large time. Some physical and kinematical properties of the models are discussed.
120612824
On the Singh-Uddin-Kamal relation in the negative binomial distribution
Abstract The empirical relation between the parameters k and n of the negative binomial distribution (NBD) as proposed by Singh, Uddin and Kamal is shown to emerge from the concept of the stationary branching process. Further consequences of this relation are derived and compared with the experimental data.
26795671
Coulomb excitation of cadmium isotopes with protons.
Low-lying positive parity levels of the isotopes in natural cadmium were Coulomb excited with 2.7--4.2 MeV protons. Eight levels of /sup 111/Cd up to 1130.4 keV and four levels of /sup 113/Cd up to 680.5 keV excitation energy, and the first 2/sup +/ states in even-even isotopes (/sup 110,112,114,116/Cd) were excited. A 50 cm/sup 3/ Ge(Li) detector was used to measure the deexcitation gamma-ray yields. The 1130.4 keV level in /sup 111/Cd had not been investigated earlier through Coulomb excitation. Also the 245.4, 700, 754.9, 855.6, and 1020.7 keV levels in /sup 111/Cd, and the 316.1 keV level in /sup 113/Cd were Coulomb excited with protons for the first time. The reduced E2 transition probabilities B(E2), and partial half-lives T/sub 1/2/ (E2), for various levels were determined. The gamma-ray angular distributions were analyzed to deduce the E2/M1 mixing ratios (delta) for various transitions from the levels in /sup 111,113/Cd. The 700, 754.9, 855.6, and 1020.7 keV levels in /sup 111/Cd, and the 680.5 keV level in /sup 113/Cd have been assigned a spin value of (3/2)/sup +/, while the 1130.4 keV level in /sup 111/Cd has been assigned a spin of (5/2)/sup +/. The results have been compared with existingmore » theoretical and experimental data in the literature.« less
18313253
Distribution of the color fields around static quarks: Flux tube profiles.
We report detailed calculations of the profiles of energy and action densities in the quark-antiquark string in SU(2) lattice gauge theory. We conclude that at a {ital q}-{ital q}{vert_bar} separation {ital R}{approx_equal}1.0 fm we are beginning to see the asymptotic flux tube. By employing the Michael sum rules we further conclude that the peak energy density approaches a constant in {ital R}. {copyright} {ital 1995 The American Physical Society.}
37575993
Coulomb excitation studies in antimony isotopes.
Various low-lying energy levels up to 1.145 MeV in {sup 121,123}Sb have been Coulomb excited using 3.0--4.0 MeV proton-beam energies. The reduced transition probabilities of the excited levels have been newly deduced from the measured yields of the deexcitation gamma rays. The values of mixing ratios for a few transitions and the removal of ambiguities in the spin values of some levels have been presented from the angular distribution analysis.
11413480
Interacting quasiopen strings.
A 26-dimensional quasiopen string, in which Poincare invariance in some dimensions is broken by new boundary conditions, has also a new mass spectrum. Based on locality we construct vertex operators and generalized dual Veneziano amplitudes with singularities corresponding to the quasiopen mass spectrum.
42506674
Neutrino magnetic moment effects in neutrino nucleus reactions.
Some low energy neutrino nucleus reactions induced by neutrinos (antineutrinos) having a magnetic moment of the order of 10{sup {minus}9}{minus}10{sup {minus}10} Bohr magneton are studied. It is found that in the case of {sup 4}He, {sup 12}C, and {sup 16}O, the detection of very low energy scalar and isoscalar elastic and inelastic reactions induced by the isoscalar vector currents can provide a better limit on the neutrino magnetic moment.