期刊论文

Liu, FM

中文

中国物理C

1674-1137

1999

23

12

1183-1189

10.3321/j.issn:0254-3052.1999.12.010

国家自然科学基金

本校为第一且通讯机构

运用Jetset产生器分别在实验室系和冲度轴坐标系中对e+e-对撞多粒子末态中阶乘矩的标度性质进行了研究.在这两种情况下,用各向同性的相空间分割得到的三维lnF2～lnM都近似于直线,表明e+e-对撞末态相空间中的动力学起伏近似各向同性.在实验室系中由px,py,pz的F2～M拟合Ochs公式得到的三个γ值近似相等;在冲度轴系中,在方向上适当选取起始拟合点,三个γ值也比较相近,进一步肯定了这一论断.这一结果表明,软、硬过程动力学起伏的本质特征--各向异性或(近似)各向同性,可以通过碰撞过程中阶乘矩标度性质的研究而揭示出来.因此,深入研究各种碰撞过程中阶乘矩的标度性质,对于了解碰撞动力学的本质有重要...

The scaling property of factorial moments in the multiparticle final-states of e(+)e(-) collisions is studied in both the laboratory and the thrust-axis coordinate systems by using the Jetset generator. It turns out that in both of the two cases, the 3-dimensional lnF(2)similar to lnM are approximately straight lines when the phase space are divided isotropically in different directions, showing that the dynamical fluctuations in the multiparticle final-state of e(+)e(-) collisions are approximately isotropic. In the lab system, the three gamma parameters obtained by fitting F(2)similar to M o...