1990 Vol. 14, No. S1

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The Muon Counter in the Beijing Spectrometer
Zhu Yongsheng, Zhang Liangsheng, Gao Wenxiu, Zhang Yingping, Zhao Pingde, Zhang Jiawen, Li Fang, Chen Lejun, Xu Zhiqing
1990, 14(S1): 1-10.
Abstract:
The arrangement and design performance of the muon identifier in the Beijing Spectrometer (BES) are described. The gas gain, plateau feature, drift time, detection efficiency, charge division for the hit location and other characteristics of the muon...
On the Nature of the Medium Lifetime Component of Positron Annihilation in a Teflon Polymer
Wang Shuying, Zhang Tianbao, Shentu Yanming, Wang Haidong, Yang Guangming
1990, 14(S1): 11-18.
Abstract:
The nature of the medium lifetime component of positron annihilation in a Teflon (PTFE) polymer has been investigated by usiiig a recently developed Time Selecting γ Energy Spectrometer with and without a magnetic field. It has been assigned to o-Ps ...
The Semi-Inclusive Distributions and the Rapidity Dependence of Multiplicity Distributions in e+e- Annihilation into Two Jets
Lai Xiaoping, Xie Qiubing, Fang Haiping
1990, 14(S1): 19-26.
Abstract:
Based on the proposed model of e+e- annihilation into two jets proposed, we further assume that the rapidity distribution of quarks is a uniform one with the constraint of four-momentum conservation. The semi-inclusive rapidity distributions and the ...
Inhomogeneous Differential Realization, Boson-Fermion Realization of Lie Superalgebra B(0,1) and its Representations
Fu Hongchen
1990, 14(S1): 27-37.
Abstract:
The differential realization of Lie superalgebra B(0,1) on the space of inhomogeneous polynomials (called inhomogeneous differential realization), and the corresponding inhomogeneous Boson-Fermion realization are studied. By making use of the inhomog...
The Fragmentation Mechanism in e+e- Annihilation
Liu Ximing
1990, 14(S1): 39-44.
Abstract:
A comparison of two different fragmentation schemes in e+e- annihilation is presented in this paper. After further calculations of the average number of various final hadrons and comparison with experiments, we find that the independent fragmentation...
Calculation of a Fixed Length Fundamental SU(2) Higgs Model
Zheng Xite, Liu Beishu
1990, 14(S1): 45-52.
Abstract:
The phase diagram of the system of SU(2) gauge field coupled with the fixed length Higgs field in the fundamental representation has been calculated analytically on the lattice by the variational-cumulant expansion method to the third order approxima...
Two-Higgs-Doublet Model and the Splitting of tt p-States
Ding Yibing, Qin Danhua, Chao Kuangta
1990, 14(S1): 53-57.
Abstract:
The existence of two Higgs-doublets alters the splittings of 1p and 2p tt states and reduces the ratios of the splittings, R. Their fine measurement will be helpful to clarify the existence of Higgs particles.
Investigation of the Nuclear Shadowing Effect in the Small x Region
Zhong Chasheng, Shen hongqing, Shen Jianping, Li Guangiie
1990, 14(S1): 59-63.
Abstract:
In this paper, we analyse the spatially overlapping behaviour of the sea quarks of neighboring nucleons in nuclei in the small x region and give a relation between the nuclear shadowing factor R(x, Q2, A) and the spatially overlapping factor ΔVA(x)/V...
A Solvable 1 + 1 Dimensional U(l) gauge model
Zheng Bo, Guo Shuohong
1990, 14(S1): 65-69.
Abstract:
A 1+1 dimensional U(1) gauge model is proposed and the spectrum with the energy eigenstates represented in terms of fermion operators is exactly solved.
Berry's Phase Factor in a Moving Reference Frame and Its Observable Effects in Physics
Sun Changpu, Zhang Linzhi
1990, 14(S1): 71-81.
Abstract:
In the non-relativistic case the properties of the adiabatic approximation solution of the Schrödinger equation in the moving reference frame and the corresponding Berry's phase factor are discussed in this paper. Translation and rotation reference f...
Choice of Single Particle Potentials in a Manv-Bodv calcu-lation-Hartree-Fock and Mass Operator Potential
Yao Yujie, Jing Xiaogong, Zhao Guoquan, Yang Shande, Wu Shishu
1990, 14(S1): 83-91.
Abstract:
A detailed comparison between the Hartree-Fock (HF) and the mass operator (M) potential is made by means of a solvable three-level model. It is found that in a quite large region of force parameters (FPR) the M potential gives a much better result th...
Excitation Functions for 16O-lnduced Reaction on 115In
Sun Tongyu, Li Wenxin, Wu Dingqing, Wang Sufang, Xu Shuwei, Zhao Lili, Guo Yingxiang, Sun Xiurong
1990, 14(S1): 93-97.
Abstract:
Excitation functions for 21 products of the reaction induced by 16O on 115In have been determined in an energy region between 51 and 97 MeV using nuclear chemistry techniques. The experimental results have been compared with those calculated using Al...
Energy Calibration for a Plastic Scintillator Beta-Detector Telescope
Xu Shuwei, Liu Manqing
1990, 14(S1): 101-104.
Abstract:
A plastic scintillator beta-detector telescope has been built and calibrated. Tests show that the uncertainty of linear energy calibration in the range of endpoint energy between 0.7 and 6.1 MeV for both β- and β+-emitters is 35 keV.

ISSN 1674-1137 CN 11-5641/O4

Original research articles, Ietters and reviews Covering theory and experiments in the fieids of

  • Particle physics
  • Nuclear physics
  • Particle and nuclear astrophysics
  • Cosmology
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