2006 Vol. 30, No. 3
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Abstract:
A search for flavor changing neutral current (FCNC) and lepton number violation (LNV) decays of charmed D mesons is performed using 33pb－1data around Ψ(3770) collected by BESⅡ detector at BEPC. Four decay modes of D0(K0e+e－,Φe+e－,ρ0e+e－ and K*0e+e－) ...
A search for flavor changing neutral current (FCNC) and lepton number violation (LNV) decays of charmed D mesons is performed using 33pb－1data around Ψ(3770) collected by BESⅡ detector at BEPC. Four decay modes of D0(K0e+e－,Φe+e－,ρ0e+e－ and K*0e+e－) ...
Abstract:
A new symplectic Lagrangian density and Faddeev-Jackiw (FJ) generalized brackets of the gauge invariant self-dual fields interacting with gauge fields have been obtained and FJ quantization of this system has been presented. Furthermore, the FJ metho...
A new symplectic Lagrangian density and Faddeev-Jackiw (FJ) generalized brackets of the gauge invariant self-dual fields interacting with gauge fields have been obtained and FJ quantization of this system has been presented. Furthermore, the FJ metho...
Abstract:
A calculation procedure for effective Abelian-Higgs-like action is presented via Faddeev-Niemi decomposition of SU(2) gauge field. A natural gauge fixing is explicitly identified in the decomposition and intrinsic relation between Abelian projection ...
A calculation procedure for effective Abelian-Higgs-like action is presented via Faddeev-Niemi decomposition of SU(2) gauge field. A natural gauge fixing is explicitly identified in the decomposition and intrinsic relation between Abelian projection ...
Abstract:
The β+/EC decay of doubly odd 176Ir has been investigated using 146Nd(35Cl, 5nγ)176Ir heavy ion fusion evaporation reaction at 210MeV bombarding energy. With the aid of a helium-jet recoil fast tape transport system, the reaction products were transp...
The β+/EC decay of doubly odd 176Ir has been investigated using 146Nd(35Cl, 5nγ)176Ir heavy ion fusion evaporation reaction at 210MeV bombarding energy. With the aid of a helium-jet recoil fast tape transport system, the reaction products were transp...
Abstract:
The pseudospin symmetry is systematically investigated by solving the Dirac equation with an (scalar and vector) Woods-Saxon potential. We find that the splittings of pseudospin energy and the lower component of pseudospin doublets are sensitive to t...
The pseudospin symmetry is systematically investigated by solving the Dirac equation with an (scalar and vector) Woods-Saxon potential. We find that the splittings of pseudospin energy and the lower component of pseudospin doublets are sensitive to t...
Abstract:
One meson exchange potential of the KK system is studied.When momentum-squared terms are included, the one meson (ρ,ω,φ) exchange potential alone fails to produce any KK bound state. With the Coulomb potential, K+K－ can form atomic bound state---the ...
One meson exchange potential of the KK system is studied.When momentum-squared terms are included, the one meson (ρ,ω,φ) exchange potential alone fails to produce any KK bound state. With the Coulomb potential, K+K－ can form atomic bound state---the ...
Abstract:
The particle evaporation in the fission process of 100Sn is studied using a diffusion model. It is shown that the shell influences strongly the proton emission whereas its effect on neutron emission is negligible, in contrast with the case of 132Sn. ...
The particle evaporation in the fission process of 100Sn is studied using a diffusion model. It is shown that the shell influences strongly the proton emission whereas its effect on neutron emission is negligible, in contrast with the case of 132Sn. ...
Abstract:
The properties of the nuclei belonging to the newly observed nuclei starting from 288115 have been studied with the generalized liquid drop model connected with WKB approximation. The calculated results have been compared with the results of the DDM3...
The properties of the nuclei belonging to the newly observed nuclei starting from 288115 have been studied with the generalized liquid drop model connected with WKB approximation. The calculated results have been compared with the results of the DDM3...
Abstract:
The spectral function of rho meson in hot and dense pion medium is studied within an effective model which describes the ρ-π coupling. The results from numerical calculation show that the spectral function becomes wider and the position of the peak m...
The spectral function of rho meson in hot and dense pion medium is studied within an effective model which describes the ρ-π coupling. The results from numerical calculation show that the spectral function becomes wider and the position of the peak m...
Abstract:
A new gamma-ray detecting device called ICI detector has been developed and tested. Like vacuum Compton diode(VCD) and dielectric Compton diode(DCD) generally used in pulsed gamma-ray measurements, ICI detector operates by utilization of the Compton ...
A new gamma-ray detecting device called ICI detector has been developed and tested. Like vacuum Compton diode(VCD) and dielectric Compton diode(DCD) generally used in pulsed gamma-ray measurements, ICI detector operates by utilization of the Compton ...
Abstract:
With an excellent time resolution, the Multi-gap Resistive Plate Chamber (MRPC) has been applied as TOF detector in particle physics experiments. We constructed more than 30 MRPC modules that were set up on the tray of RICH-STAR successfully. By the ...
With an excellent time resolution, the Multi-gap Resistive Plate Chamber (MRPC) has been applied as TOF detector in particle physics experiments. We constructed more than 30 MRPC modules that were set up on the tray of RICH-STAR successfully. By the ...
Abstract:
For the Phase 2 of HLS (Hefei Light Source)Project, many sextupoles and octupoles have been installed in the machine to improve the operation condition. These nonlinear elements will introduce nonlinear effects to the beam dynamics. In this paper, we...
For the Phase 2 of HLS (Hefei Light Source)Project, many sextupoles and octupoles have been installed in the machine to improve the operation condition. These nonlinear elements will introduce nonlinear effects to the beam dynamics. In this paper, we...
Abstract:
To eliminate the higher order modes (HOMs) in superconducting cavity, an improvement study on HOM coupler has been done. With Code HFSS,the HOM coupler for 1+1/2 Cell superconducting cavity of the Peking University has been designed and optimized. Th...
To eliminate the higher order modes (HOMs) in superconducting cavity, an improvement study on HOM coupler has been done. With Code HFSS,the HOM coupler for 1+1/2 Cell superconducting cavity of the Peking University has been designed and optimized. Th...
Abstract:
For the sake of acquiring the shorter beam bunch length a 500MHz RF system will be adopted in Beijing Electron-Positron Collider Upgrade (BEPCⅡ) project to replace the existing 200MHz RF system. The designed beam current of BEPCⅡ is 0.91A which put f...
For the sake of acquiring the shorter beam bunch length a 500MHz RF system will be adopted in Beijing Electron-Positron Collider Upgrade (BEPCⅡ) project to replace the existing 200MHz RF system. The designed beam current of BEPCⅡ is 0.91A which put f...
Abstract:
When charged particle beams traverse in an accelerating structure, the excited wake fields may dilute the beam energy spread and emittance. In order to estimate the wake field effects on the beam dynamics properly, it is very important to calculate t...
When charged particle beams traverse in an accelerating structure, the excited wake fields may dilute the beam energy spread and emittance. In order to estimate the wake field effects on the beam dynamics properly, it is very important to calculate t...
Abstract:
Electron cloud instability (ECI) may take place in a storage ring when the machine is operated with a multi-bunch positively charged beam. Transverse blowup due to electron cloud has been observed in some machines and is considered to be a major limi...
Electron cloud instability (ECI) may take place in a storage ring when the machine is operated with a multi-bunch positively charged beam. Transverse blowup due to electron cloud has been observed in some machines and is considered to be a major limi...
Abstract:
A depth of interaction (DOI) detector for γ-rays has been developed for a high-resolution positron emission tomography (PET) system dedicated to small animal studies. It is well known that different surface treatment on the crystals influences the to...
A depth of interaction (DOI) detector for γ-rays has been developed for a high-resolution positron emission tomography (PET) system dedicated to small animal studies. It is well known that different surface treatment on the crystals influences the to...
Abstract:
It is investigated experimentally how the thermal properties of some specimens of thermal control coatings change with irradiation fluence ranging from 1.0×1011p/cm2 to 1.0×1017p/cm2 with 110keV proton beam. It is shown the thermal properties of all ...
It is investigated experimentally how the thermal properties of some specimens of thermal control coatings change with irradiation fluence ranging from 1.0×1011p/cm2 to 1.0×1017p/cm2 with 110keV proton beam. It is shown the thermal properties of all ...
Abstract:
Based on our previous work, the phase state and phase operator introduced by Pegg and Barnett are generalized to two-mode q-deformed circumstances. With the aid of numerical method, the phase probability distributions of q-deformed pair coherent stat...
Based on our previous work, the phase state and phase operator introduced by Pegg and Barnett are generalized to two-mode q-deformed circumstances. With the aid of numerical method, the phase probability distributions of q-deformed pair coherent stat...
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