2000 Vol. 24, No. 10
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Abstract:
The family events observed with iron emulsion chambers at Mt. Kanbala are analyzed and compared with the simulations by the COSMOS code and CORSIKA code respectively. A detailed study on the production of super-high energy γ-hadron families with ener...
The family events observed with iron emulsion chambers at Mt. Kanbala are analyzed and compared with the simulations by the COSMOS code and CORSIKA code respectively. A detailed study on the production of super-high energy γ-hadron families with ener...
Abstract:
Based on 7.8×106 J/ψ events collected by BES experiment,J/ψ radiative decay J/ψ→γγV(ρ,φ) have been studied. The η(1430) resonance has been observed in these two channels respectively. Its mass,width and branching ratio are 1431±17MeV,88±28MeV,and Br(...
Based on 7.8×106 J/ψ events collected by BES experiment,J/ψ radiative decay J/ψ→γγV(ρ,φ) have been studied. The η(1430) resonance has been observed in these two channels respectively. Its mass,width and branching ratio are 1431±17MeV,88±28MeV,and Br(...
Abstract:
The Yukawa corrections from the pseudo-Goldstone bosons (PGBs) in the one generation technicolor (OGTC) model to the process γγ→b are calculated. We find the corrections from the PGBs to the cross section γγ→b are more than 10% in the certain paramet...
The Yukawa corrections from the pseudo-Goldstone bosons (PGBs) in the one generation technicolor (OGTC) model to the process γγ→b are calculated. We find the corrections from the PGBs to the cross section γγ→b are more than 10% in the certain paramet...
Abstract:
A possibility to search for the isoscalar 1－+ exotic state through the J/ψ decay process J/ψ→V+X,X→a2+π at BEPC/BES is discussed in two cases of single state and two-state coupling.The results show that this possibility is existent both in J/ψ radiat...
A possibility to search for the isoscalar 1－+ exotic state through the J/ψ decay process J/ψ→V+X,X→a2+π at BEPC/BES is discussed in two cases of single state and two-state coupling.The results show that this possibility is existent both in J/ψ radiat...
Abstract:
In the frame of color-octet mechanism and according to NRQCD factorization of q production,using three sets of parton distribution function of Pomeron given by L.ALvero et al.,the cross section of J/ψ in γ+p→p+J/ψ+X process is calculated and discusse...
In the frame of color-octet mechanism and according to NRQCD factorization of q production,using three sets of parton distribution function of Pomeron given by L.ALvero et al.,the cross section of J/ψ in γ+p→p+J/ψ+X process is calculated and discusse...
Abstract:
The vacuum state of (2+1) dimensional SU(2) lattice gauge field theory is investigated. The general expressions of the parameters (μ0 and μ2) of the continuum vacuum wave function are derived.The numerical results which come from the improved Hamilto...
The vacuum state of (2+1) dimensional SU(2) lattice gauge field theory is investigated. The general expressions of the parameters (μ0 and μ2) of the continuum vacuum wave function are derived.The numerical results which come from the improved Hamilto...
Abstract:
The energy spectra of intermediate mass fragments (IMF) emitted in 30 MeV/u 40Ar+115In reaction has been measured. After analyzed the energy spectra of the same kind of IMF emitted at different angles,the dependence of emission mechanism of IMF on th...
The energy spectra of intermediate mass fragments (IMF) emitted in 30 MeV/u 40Ar+115In reaction has been measured. After analyzed the energy spectra of the same kind of IMF emitted at different angles,the dependence of emission mechanism of IMF on th...
Abstract:
The energy spectra and angular distributions of products(Z=4-14) emitted in reaction 156.3MeV 28Si+12C were measured by using ΔE-E telescope detectors. Then Lorenz invariant cross sections of the products were presented. The most probable kinetic ene...
The energy spectra and angular distributions of products(Z=4-14) emitted in reaction 156.3MeV 28Si+12C were measured by using ΔE-E telescope detectors. Then Lorenz invariant cross sections of the products were presented. The most probable kinetic ene...
Abstract:
The possible neutron and proton drip line nuclei and their corresponding properties of Pr isotope chain are studied in the framework of the relativistic mean-field(RMF)theory with non-linear meson self-interactions. The pairing effect is treated by B...
The possible neutron and proton drip line nuclei and their corresponding properties of Pr isotope chain are studied in the framework of the relativistic mean-field(RMF)theory with non-linear meson self-interactions. The pairing effect is treated by B...
Abstract:
Effect of deformation on prescission particle emission was studied. The fission delay time extracted from the measured prescission light charged particle multiplicity of fission of light system 111In, produced in 10.6MeV/u 84Kr+27Al collision, is red...
Effect of deformation on prescission particle emission was studied. The fission delay time extracted from the measured prescission light charged particle multiplicity of fission of light system 111In, produced in 10.6MeV/u 84Kr+27Al collision, is red...
Abstract:
Isospin effect of fragmentation reaction on isotopic distribution was investigated by a modified statistical abrasion-ablation model. It is shown that the isotopic distribution shifts toward the neutron rich side for neutron rich projectile, but this...
Isospin effect of fragmentation reaction on isotopic distribution was investigated by a modified statistical abrasion-ablation model. It is shown that the isotopic distribution shifts toward the neutron rich side for neutron rich projectile, but this...
Abstract:
Damping of giant resonance in hot nuclei is investigated using time dependent twobody correlation density matrix theory (TDDM) at several finite thermal excitation energies corresponding to temperatures T =0—6MeV. The results are obtained by solving ...
Damping of giant resonance in hot nuclei is investigated using time dependent twobody correlation density matrix theory (TDDM) at several finite thermal excitation energies corresponding to temperatures T =0—6MeV. The results are obtained by solving ...
Abstract:
Based on the concept of correlative degree, a new method of high-order collective-flow measurement is constructed in this paper, with which azimuthal correlations, correlations of final state transverse momentum magnitude and transverse correlations ...
Based on the concept of correlative degree, a new method of high-order collective-flow measurement is constructed in this paper, with which azimuthal correlations, correlations of final state transverse momentum magnitude and transverse correlations ...
Abstract:
Leptonic decay and radiative transition of ψ′ in medium at finite temperature and density are studied by using different quark antiquark potentials. The behaviour of ψ′ in the medium at finite temperature and density is obtained.
Leptonic decay and radiative transition of ψ′ in medium at finite temperature and density are studied by using different quark antiquark potentials. The behaviour of ψ′ in the medium at finite temperature and density is obtained.
Abstract:
The production of metallic ion beam by means of many methods in high charge state ECR (Electron Cyclotron Resonance) ion source is reviewed. A small evaporation oven with external diameter 8 mm and length 70 mm was tested for metallic ion beam produc...
The production of metallic ion beam by means of many methods in high charge state ECR (Electron Cyclotron Resonance) ion source is reviewed. A small evaporation oven with external diameter 8 mm and length 70 mm was tested for metallic ion beam produc...
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ISSN 1674-1137 CN 11-5641/O4
Original research articles, Ietters and reviews Covering theory and experiments in the fieids of
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- Cosmology
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