期刊:
Chinese Journal of Nuclear Physics,1995年17(4):318-321 ISSN:1001-6031
通讯作者:
Zhang, Zhanjun
作者机构:
[Zhanjun; Liu] 华中师范大学粒子物理所;[Sang] 武汉大学物理系
通讯机构:
[Zhang, Zhanjun] H;Huazhong Normal Univ, Wuhan, China
关键词:
The;SDG;interacting;BOSON;model;DETERMINATION;of;LEADING;TERMS;MICROSCOPIC;investigation;The sdg interacting boson model;Determination of leading terms;Microscopic investigation
摘要:
In order to simplify the complicated sdg interacting boson model (IBM) Hamiltonian, a microscopic approach based on the Dyson boson mapping and the MJS substitution was presented, and the leading terms in the interaction Hamiltonian were discussed by using numerical investigation. Comparisons of both the calculated levels and the overlap of wave functions between the exact results and the approximations were made to find out negligible part in the Hamiltonian. The results show that the leading terms determined in this paper may provide a way to simplify the complicated calculations and save the computing time.
通讯机构:
[WU, YF] H;HUAZHONG NORMAL UNIV,INST PARTICLE PHYS,WUHAN 430070,PEOPLES R CHINA.
关键词:
HIGH ENERGY MULTIPARTICLE PRODUCTION;LONGITUDINAL PHASE SPACE;DYNAMICAL FLUCTUATION;AVERAGE TRANSVERSE MOMENTUM
摘要:
The highly anisotropic phase space (known as longitudinal phase space) of multiparticle final states in high energy hh collisions is studied in detail. It is pointed out that the anisotropy of phase space should manifest itself not only in the dramatic difference in magnitude between the average transverse and longitudinal momenta, but also in the anisotropy of dynamical fluctuations in the two directions. It means that the particle distribution in phase space has the property of selfaffine fractal. A method for experimentally testing the selfaffine fractality and measuring its characteristic parameterHurst exponent is given. In addition, the correlation between the degree of longitudinal fractality and the magnitude of average transverse momentum is discussed. A new characteristic quantity- average transverse momentum per event- for de scribing the dynamical property of an event (hard, soft or ultrasoft) is proposed. A comparison of the results with experimental data is given.
作者机构:
[Adamovich M I] Lebedev Institute;[Aggarmal M M; Arora R; Bhatia V S] Panjab University;[Alexandrov Y A] Lebedev Institure;[Andreeva N P; Anson Z V; Bubnov V I; Ceitimbetov A M; Chasnikov I Y] Inst of High Energy Physics;[Avetyan F A] Physical Institute
通讯机构:
[CAI, X] H;HUA ZHONG NORMAL UNIV, INST PARTICLE PHYS, WUHAN 430070, PEOPLES R CHINA.
摘要:
Recent experimental data on the negative correlation between forward energy and transverse energy, which have been reported for the interactions of 14.6A GeV Si28 with Al, Cu, Au, and Pb, 60A and 200A GeV O16 and S32 with S, Cu, Ag, and Au, are investigated by a model based on the description of geometrical properties of nucleus-nucleus collision processes. A parameter, ellipticity e, which might describe the conversion of initial energy into that of radiated final-state hadrons is proposed.