【摘 要】
：
The transverse momentum distribution and the transverse mass distribution of charged hadrons produced in nucleus-nucleus collisions at high energies are describ
【机 构】
：
Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China
论文部分内容阅读
The transverse momentum distribution and the transverse mass distribution of charged hadrons produced in nucleus-nucleus collisions at high energies are described by using a two-cylinder model. The results calculated by the model are compared and found to be in agreement with the experimental data of the STAR and E895 Collaborations, measured in Au-Au collisions at the relativistic heavy ion collider (RHIC) and alteating-gradient synchrotron (AGS) energies, respectively. In the energy range conceed, the excitation degree of emission source close to the central axis of cylinders increases obviously with the collision centrality and incident energy increasing, but it does not show any obvious change with the increase of the (pseudo) rapidity in central collisions. The excitation degree of emission source close to the side-surface of cylinders does not show any obvious change with the collision centrality, the (pseudo) rapidity, and the incident energy increasing.
其他文献
Based on the scales transformation of electromagnetic theory,the analytical expressions of electric fields inside and outside a magnetised cold plasma sphere ar
Nonlinear dynamics of the time-delayed Mackey-Glass systems is explored.Coexistent multiple chaotic attractors are found.Attractors with double-scroll structure
The use of an attenuated total reflection-coupling mode of prism coated with metal film to excite the interference of the surface plasmon polaritons (SPPs) was
Electromagnetic scattering from a rough surface of layered medium is investigated, and the formulae of the scattering coefficients for different polarizations a
This paper calculates the equilibrium structure and the potential energy functions of the ground state (X2∑+) and the low lying excited electronic state (A2∏)
The lowest-energy structures and the electronic properties of CdnSn(n=1-8) clusters have been studied by using density-functional theory simulating package DMol
《新闻界》一九八六年第五期刊登杨飚的《我国新闻不是商品》一文,认为把新闻当成商品,新闻改革恐有走偏方向之虑。首先,新闻与商品的根本性质不同。按照马克思主义政治经济
本文研究了黑膜覆盖、白膜覆盖、稻草覆盖、蔗叶覆盖四种覆盖方式对旱作稻田土壤水分和水稻生长的影响。主要结果如下：⑴不同的覆盖方式对改善水稻田间生态环境方面以稻草覆盖
Fibre sensors exhibit a number of advantages over other sensors such as high sensitivity, electric insulation, corrosion resistance, interference rejection and