1992 Vol. 16, No. 10
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Abstract:
The τ lepton mass was measured with data taken by the BES detector at BEPC collider at Institute of High Energy Physics in Beijing.Approximately 5000nb－1 luminosity was accumulated.Pairs of τ lepton produced near the threshold have been studied in eμ...
The τ lepton mass was measured with data taken by the BES detector at BEPC collider at Institute of High Energy Physics in Beijing.Approximately 5000nb－1 luminosity was accumulated.Pairs of τ lepton produced near the threshold have been studied in eμ...
Abstract:
The measurement of radiation damage of tile/fiber scintillator modules to be used for the SDC calorimeter are described.Four tile scintillator modules were irradiated up to 6 Mrad with the BEPC 1.1GeV electron beam.We have studied the light output at...
The measurement of radiation damage of tile/fiber scintillator modules to be used for the SDC calorimeter are described.Four tile scintillator modules were irradiated up to 6 Mrad with the BEPC 1.1GeV electron beam.We have studied the light output at...
Abstract:
Using a part of China-Japan Pb emulsion chambers (K6 K7,thick 30 c.u.)exposed at Mt.kanbala (5500m,atmospheric depth 520g/cm2),the high energy gamms rays and hadrons are studied.The vertical intensities,energy spectra,zenith angie distributions and a...
Using a part of China-Japan Pb emulsion chambers (K6 K7,thick 30 c.u.)exposed at Mt.kanbala (5500m,atmospheric depth 520g/cm2),the high energy gamms rays and hadrons are studied.The vertical intensities,energy spectra,zenith angie distributions and a...
Abstract:
In this paper we have investigated the infrared divergence in QFT from the point of view of unitarities and analyticities.We have shown that in QED,the infrared divergence for the imaginary part of a bubble diagram at any order of a would be canceled...
In this paper we have investigated the infrared divergence in QFT from the point of view of unitarities and analyticities.We have shown that in QED,the infrared divergence for the imaginary part of a bubble diagram at any order of a would be canceled...
Abstract:
After a summary of the predictions for th neutron electric dipole moment in a number of models of CP violation,we review mainly the recent developments associated with Weinberg's purely gluonic CP violation operator.Its implications on the neutron el...
After a summary of the predictions for th neutron electric dipole moment in a number of models of CP violation,we review mainly the recent developments associated with Weinberg's purely gluonic CP violation operator.Its implications on the neutron el...
Abstract:
The structure and Verma module of matrix element algebra A(3)q of quantum group GL(3)q are studied using a similar method for studying the structure and Verma module of semisimple Lie algebras.The q-boson realization of A(3)q is constructed from its ...
The structure and Verma module of matrix element algebra A(3)q of quantum group GL(3)q are studied using a similar method for studying the structure and Verma module of semisimple Lie algebras.The q-boson realization of A(3)q is constructed from its ...
Abstract:
The hadronic decay process J/ψ→V1+X,X→V2+V3,V2,V3→2P(or 3P)(here Vi and P stand for vector and pseudoscalar meson,respectively) has been discussed in this paper.For the intermediate state X with various spin-parity JP,the corresponding helicity forma...
The hadronic decay process J/ψ→V1+X,X→V2+V3,V2,V3→2P(or 3P)(here Vi and P stand for vector and pseudoscalar meson,respectively) has been discussed in this paper.For the intermediate state X with various spin-parity JP,the corresponding helicity forma...
Abstract:
The production process of grey particles in high energy nucleus-nucleus collisions is in-vestigated in this paper.The comparison of the experimental mulitiplicity distributions with the calculations reveals that the statistical model well describes t...
The production process of grey particles in high energy nucleus-nucleus collisions is in-vestigated in this paper.The comparison of the experimental mulitiplicity distributions with the calculations reveals that the statistical model well describes t...
Abstract:
A high mass resolution telescope was built for heavy-ion reaction mechanism research at intermediate energies (20—100MeV/u) This telescope consists of three silicon ΔE detectors (130μm+1580μm+5000μm) and a CsI(Tl) scintillator with photodiode readout...
A high mass resolution telescope was built for heavy-ion reaction mechanism research at intermediate energies (20—100MeV/u) This telescope consists of three silicon ΔE detectors (130μm+1580μm+5000μm) and a CsI(Tl) scintillator with photodiode readout...
Abstract:
The high spin states of 121Cs have been populated via the 112Sn (12C,p2n) reaction and measured by in beam γ technique.Two new levels in each of the πh11/2,ΔJ=2 and πg9/2,ΔJ=1 bands were observed.
The high spin states of 121Cs have been populated via the 112Sn (12C,p2n) reaction and measured by in beam γ technique.Two new levels in each of the πh11/2,ΔJ=2 and πg9/2,ΔJ=1 bands were observed.
Abstract:
There exist a lot of parameters of optical-model from elastic scattering and the cross sections of nuclear reaction.The effective distance and its nuclear potential have been analysed.Comparing with other phenomenological potentials,The systematic di...
There exist a lot of parameters of optical-model from elastic scattering and the cross sections of nuclear reaction.The effective distance and its nuclear potential have been analysed.Comparing with other phenomenological potentials,The systematic di...
Abstract:
Effective boson numbers in IBM-Ⅱ are tackled with a simple semi-empirical method,the saturation of proton boson numbers and neutron boson numbers is suggested.It explains the strong correlation and saturation effect of E2 and M1 transition strengrths...
Effective boson numbers in IBM-Ⅱ are tackled with a simple semi-empirical method,the saturation of proton boson numbers and neutron boson numbers is suggested.It explains the strong correlation and saturation effect of E2 and M1 transition strengrths...
Abstract:
In this paper,considering the three-body interaction between the d bosons,a simple effective three-body potential is introduced into the IBM Hamiltonian,and its influence on the breaking of the O(6) symmetry is inve stigated.Also the energy spectra o...
In this paper,considering the three-body interaction between the d bosons,a simple effective three-body potential is introduced into the IBM Hamiltonian,and its influence on the breaking of the O(6) symmetry is inve stigated.Also the energy spectra o...
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