2005 Vol. 29, No. 4
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Abstract:
A general introduction to the theoretical predictions for the mass,width and decay modes of exotic states is briefly described. the current status of experiment searches for the candidates of exotic states and their inconsistences with theoretical pr...
A general introduction to the theoretical predictions for the mass,width and decay modes of exotic states is briefly described. the current status of experiment searches for the candidates of exotic states and their inconsistences with theoretical pr...
Abstract:
Starting from the point-view that the constituent quark has its own inner structure and according to the hypothesis of the maximum non-perturbative strong interaction reaction which should be obeyed in high energy strong-soft Processes ,we proposed a...
Starting from the point-view that the constituent quark has its own inner structure and according to the hypothesis of the maximum non-perturbative strong interaction reaction which should be obeyed in high energy strong-soft Processes ,we proposed a...
Abstract:
By Solving Shrodinger equation with the RPA coupled cluster method, The higher order glueball wave function in 2+1-D SU(2) lattice gauge theory is calculated. In the calculation, hollow Wilson graphs are selected as the trial wave function, and speci...
By Solving Shrodinger equation with the RPA coupled cluster method, The higher order glueball wave function in 2+1-D SU(2) lattice gauge theory is calculated. In the calculation, hollow Wilson graphs are selected as the trial wave function, and speci...
Abstract:
Operator decomposition approach is used to calculate the non-adiabatic geometric phase of anharmonic oscillator. As an example we focus on isotonic oscillator, a type of anharmonic oscillator. The Aharonov-Anandan phase is derived when we choose base...
Operator decomposition approach is used to calculate the non-adiabatic geometric phase of anharmonic oscillator. As an example we focus on isotonic oscillator, a type of anharmonic oscillator. The Aharonov-Anandan phase is derived when we choose base...
Abstract:
The contribution of the resonant continuum to pairing correlations is properly treated in the RMF+BCS approximation with a constant pairing strength. The results show that the contribution of the proper treatment of the resonant continuum to pairing ...
The contribution of the resonant continuum to pairing correlations is properly treated in the RMF+BCS approximation with a constant pairing strength. The results show that the contribution of the proper treatment of the resonant continuum to pairing ...
Abstract:
In the framework of perturbative QCD,the exclusive decays Υ→BˉB(B:baryon) are studied.With the constituent quark model describing the charm-baryonic structure, we calculate the decay widths for $\Upsilon\to p\bar p,\Lambda_c\bar \Lamb...
In the framework of perturbative QCD,the exclusive decays Υ→BˉB(B:baryon) are studied.With the constituent quark model describing the charm-baryonic structure, we calculate the decay widths for $\Upsilon\to p\bar p,\Lambda_c\bar \Lamb...
Abstract:
using the isospin–and momentum–dependent transport model, for three different symmetry energies, we have calculated the π–/π+ ratio as a function of time and tranverse–momentum in central 132sn+124 sn collision at e_beam/A=400mev. the results show th...
using the isospin–and momentum–dependent transport model, for three different symmetry energies, we have calculated the π–/π+ ratio as a function of time and tranverse–momentum in central 132sn+124 sn collision at e_beam/A=400mev. the results show th...
Abstract:
The net–proton distribution features at rhic have been analyzed by using non–uniform flow model in this paper. it is found that the system produced at the rhic energy region has stronger non–uniform feature than at the ags and sPs energy regions, whi...
The net–proton distribution features at rhic have been analyzed by using non–uniform flow model in this paper. it is found that the system produced at the rhic energy region has stronger non–uniform feature than at the ags and sPs energy regions, whi...
Abstract:
this article describes the design and simulation of the scheme of main drift chamber (mdc) trigger for besⅢ (beijing spectrometer Ⅲ). the algorithm of mdc trigger includes 3 steps: track segments finding (tsf), track finding (tf) and trigger conditio...
this article describes the design and simulation of the scheme of main drift chamber (mdc) trigger for besⅢ (beijing spectrometer Ⅲ). the algorithm of mdc trigger includes 3 steps: track segments finding (tsf), track finding (tf) and trigger conditio...
Abstract:
the technics and test results and preliminary applications of si multi–strip detector fabricated by using microelectronic technique were described in this paper. the sensitive area of this kind of detector is 50mm×20mm. the P side surface was divided...
the technics and test results and preliminary applications of si multi–strip detector fabricated by using microelectronic technique were described in this paper. the sensitive area of this kind of detector is 50mm×20mm. the P side surface was divided...
Abstract:
The performance of a small–cell drift chamber operated with two helium–based gas mixtures, he/c_3h_8(60/40) and he/ch_4(60/40), was studied using cosmic rays, respectively. the gas mixture ar/co_2/ch_4(89/10/1) was also tested for comparison. the spa...
The performance of a small–cell drift chamber operated with two helium–based gas mixtures, he/c_3h_8(60/40) and he/ch_4(60/40), was studied using cosmic rays, respectively. the gas mixture ar/co_2/ch_4(89/10/1) was also tested for comparison. the spa...
Abstract:
In this paper the time performance of the precision drift tube at high pressure has been studied. the time spectrum of the drift electrons and the (r–t) relationship between the distance from the charged particle track to the anode wire and the drift...
In this paper the time performance of the precision drift tube at high pressure has been studied. the time spectrum of the drift electrons and the (r–t) relationship between the distance from the charged particle track to the anode wire and the drift...
Abstract:
A new conception of measuring pulsed neutron flux in high gamma–ray environment with a thin plastic scintillating foil is presented. based on the calculations of the response to neutrons and gamma–rays, a new gamma–insensitive detector for detecting ...
A new conception of measuring pulsed neutron flux in high gamma–ray environment with a thin plastic scintillating foil is presented. based on the calculations of the response to neutrons and gamma–rays, a new gamma–insensitive detector for detecting ...
Abstract:
The flux concentrator is a matching device for the positron beam, which matches the transverse emittance between the target and successive accelerator tubes. it is one of the most important parts of the bePcⅡ positron source and for improving the pos...
The flux concentrator is a matching device for the positron beam, which matches the transverse emittance between the target and successive accelerator tubes. it is one of the most important parts of the bePcⅡ positron source and for improving the pos...
Abstract:
A new method for the 2–d low energy electron beam profile measurement is developed. based on the ct(computer tomography) algorithm, multi sets of data about the 1–d beam profile projections are attained by rotating the multi–wire target. then a 2–d b...
A new method for the 2–d low energy electron beam profile measurement is developed. based on the ct(computer tomography) algorithm, multi sets of data about the 1–d beam profile projections are attained by rotating the multi–wire target. then a 2–d b...
Abstract:
In this paper, the lorentz force detuning of superconducting cavity is illustrated and discussed in detail. the static lorentz force detuning and dynamic lorentz force detuning of a 704mhz/β=0.45 single–cell superconducting cavity is calculated with ...
In this paper, the lorentz force detuning of superconducting cavity is illustrated and discussed in detail. the static lorentz force detuning and dynamic lorentz force detuning of a 704mhz/β=0.45 single–cell superconducting cavity is calculated with ...
Abstract:
A new idea to compensate the coupling of bePcⅡ will be introduced in this paper. the detector solenoid field in the interaction region will be compensated by six anti–solenoids which are located nearby the interaction point. skew quadrupoles are adop...
A new idea to compensate the coupling of bePcⅡ will be introduced in this paper. the detector solenoid field in the interaction region will be compensated by six anti–solenoids which are located nearby the interaction point. skew quadrupoles are adop...
Abstract:
cluster analysis is an effective method for describing colony character. hower, as the size of mined databases increased ,it is a complex problem in searching for the extremum of score function. in this paper, we propose a novel technique and apply i...
cluster analysis is an effective method for describing colony character. hower, as the size of mined databases increased ,it is a complex problem in searching for the extremum of score function. in this paper, we propose a novel technique and apply i...
Abstract:
A transfer standard detector was calibrated for the fist time with respect to the vuv/euv primary standard detector built at the metrology beamline in national synchrotron radiation laboratory (nsrl) at wavelength 17.625nm, 6.8nm and 92nm. the repeti...
A transfer standard detector was calibrated for the fist time with respect to the vuv/euv primary standard detector built at the metrology beamline in national synchrotron radiation laboratory (nsrl) at wavelength 17.625nm, 6.8nm and 92nm. the repeti...
Abstract:
In this paper, the dynamical properties of the field entropy in the multiphoton jaynes–cummings model are studied. it is showed that the evolution of field entropy has no periodicity and is influenced by the initial states of atoms and the initial ph...
In this paper, the dynamical properties of the field entropy in the multiphoton jaynes–cummings model are studied. it is showed that the evolution of field entropy has no periodicity and is influenced by the initial states of atoms and the initial ph...
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