1993 Vol. 17, No. 2
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Abstract:
Based on the 2.5 million J/ψ's collected by the BES at BEPC,through the hadronic decay J/ψ→ωf2(1270),f2(1270)→π+π－,ω→π+π－π0,the properties of the resonance f2(1270) are studied:its mass,width,and branching ratio.the angular distribution is fitted wit...
Based on the 2.5 million J/ψ's collected by the BES at BEPC,through the hadronic decay J/ψ→ωf2(1270),f2(1270)→π+π－,ω→π+π－π0,the properties of the resonance f2(1270) are studied:its mass,width,and branching ratio.the angular distribution is fitted wit...
Abstract:
The spectra and decay times of a serious of Ce+3—doped BaF2 crystals have been determined.The results demonstrate that a BaF2 crystal with a proper amount of Ce+3 doped have some outstanding advantages:a near-blue fluorescence with quite fast decay t...
The spectra and decay times of a serious of Ce+3—doped BaF2 crystals have been determined.The results demonstrate that a BaF2 crystal with a proper amount of Ce+3 doped have some outstanding advantages:a near-blue fluorescence with quite fast decay t...
Abstract:
We calculate the flavor-singlet axial-vector current in a quark model within pseudoscalar background-field through the Seeley-DeWitt coefficients.This current is responsible for the quark spin content of proton,and is of O(1) in the large-Ne expansio...
We calculate the flavor-singlet axial-vector current in a quark model within pseudoscalar background-field through the Seeley-DeWitt coefficients.This current is responsible for the quark spin content of proton,and is of O(1) in the large-Ne expansio...
Abstract:
By considering the gab as an independent field,we have derived a covariant Polyakov string equation.The general eigenfunctions in the case of the free and fixed boundary conditions to this equation are obtained.By evaluating the trace of the fixed ei...
By considering the gab as an independent field,we have derived a covariant Polyakov string equation.The general eigenfunctions in the case of the free and fixed boundary conditions to this equation are obtained.By evaluating the trace of the fixed ei...
Abstract:
The phase structure of 3-dimensional SU(2) lattice gauge theory is studied using variational method with an independent plaquette trial action.The mean-plaquette internal energy EP～β curve is smooth,which shows only one confining phase,and is better ...
The phase structure of 3-dimensional SU(2) lattice gauge theory is studied using variational method with an independent plaquette trial action.The mean-plaquette internal energy EP～β curve is smooth,which shows only one confining phase,and is better ...
Abstract:
The order parameterfor the U(1) lattice gauge model at finite temperature with Nτ=1 is calculated by using the variational-cumulant expansion method.The result is in agreement with the Monte Carlo simulations.The specific simplification in the case ...
The order parameter
Abstract:
The behavior of the chiral soliton model at high temperature is investigated.as well as the influence of thermal effects on the chiral soliton solutions and the fermion condensation is analysed.One possible physical mechanism is established,which is ...
The behavior of the chiral soliton model at high temperature is investigated.as well as the influence of thermal effects on the chiral soliton solutions and the fermion condensation is analysed.One possible physical mechanism is established,which is ...
Abstract:
Using the precise expression of electron,positron distribution function we obtained earlier,we derive the rigorous analytical expression of radiator in e+e－ collision process.This series expression converges rapidly to the precise result required.The...
Using the precise expression of electron,positron distribution function we obtained earlier,we derive the rigorous analytical expression of radiator in e+e－ collision process.This series expression converges rapidly to the precise result required.The...
Abstract:
The K+N two-body potential is calculated in the framework of the constituent quark model.The derived potential includes the central and spin-orbit contributions with a simple analytic form.The K+N scattering phase shifts are calculated and compared w...
The K+N two-body potential is calculated in the framework of the constituent quark model.The derived potential includes the central and spin-orbit contributions with a simple analytic form.The K+N scattering phase shifts are calculated and compared w...
Abstract:
A molecular orbital theory is formulated based on α transfer for the interpretation of subbarrier fusion enhancement.The molecular potential induced by α transfer causes the enhancement of the fusion.The fusion cross section is calculated for the 24M...
A molecular orbital theory is formulated based on α transfer for the interpretation of subbarrier fusion enhancement.The molecular potential induced by α transfer causes the enhancement of the fusion.The fusion cross section is calculated for the 24M...
Abstract:
The projectile-like fragments emittd from 46.7MeV/u 12C induced reactions have been measured.The most probable energies of the PLFs due to the projectile fragmentation can be reproduced within the Abrasion picture.Their parallel momentum distribution...
The projectile-like fragments emittd from 46.7MeV/u 12C induced reactions have been measured.The most probable energies of the PLFs due to the projectile fragmentation can be reproduced within the Abrasion picture.Their parallel momentum distribution...
Abstract:
Fission fragment angular distribution and angular correlation in the reaction induced by 84.0MeV 16O bombarded 238U have been measured by using two position-sensitive PPAC with large area.Transfer fission has been removed from total fission using fis...
Fission fragment angular distribution and angular correlation in the reaction induced by 84.0MeV 16O bombarded 238U have been measured by using two position-sensitive PPAC with large area.Transfer fission has been removed from total fission using fis...
Abstract:
All of the main non-perturbative results in the standard Green's function theory are obtained naturally and explicitly from the set of dynamic equations of the many-body correlation Green's functions by means of truncation up to lower correlations.Th...
All of the main non-perturbative results in the standard Green's function theory are obtained naturally and explicitly from the set of dynamic equations of the many-body correlation Green's functions by means of truncation up to lower correlations.Th...
Abstract:
The dissipative energy,productions of subthreshold pion mesons and flowangle in intermediate-energy heavy system 86Kr+197Au reaction have been calculated by the extended BUU model,meanwhile,the relation of the energy dissipation to the charge number ...
The dissipative energy,productions of subthreshold pion mesons and flowangle in intermediate-energy heavy system 86Kr+197Au reaction have been calculated by the extended BUU model,meanwhile,the relation of the energy dissipation to the charge number ...
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