Fragmentation of light initial quarks into charm measons in e+ e- annihilation

被引：0
|
作者：
Jun, Y [1 ]
Li, SY [1 ]
Xie, QB [1 ]
机构：
[1] Shandong Univ, Sch Phys & Microelect, Jinan 250100, Peoples R China
来源：
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION | 2003年 / 27卷 / 10期
关键词：
light-cone wavefunction; invariant mass spectrum; V/P ratio; polarization of vector meson;
D O I：
暂无
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We study the process that the light initial quarks produced in e(+)e(-) annihilation combine with the (c) over bar from gluon splitting to form (D) over bar 's (D- + D-s(-) + (D) over bar (0)) or (D) over bar*'s (D*(-) + D-s(*-) + (D) over bar (*0)). The 'light + heavy' bound state is described by light-cone wavefunction. The contribution of this process to (D) over bar ((D) over bar*) production at Z(0) pole is much larger compared with that in lower energies (e. g. 10.6GeV). For this special process, the invariant mass of (D) over bar ((D) over bar*) and the charm hadron fragmented from the c quark has a unique spectrum which peaks near 2M((D) over bar) if we constrain the (D) over bar ((D) over bar*) from all processes with energy larger than 20GeV. It is also noticeable that the produced (D) over bar* in this process is dominantly longitudinally polarized, which is consistent with the OPAL data.
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页码：852 / 856
页数：5
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