摘要
对高能电子-正电子对撞产生实验上可以直接观察的可视喷注的标度进行了仔细研究.根据在s^(1/s)=17—30Gev的电子-正电子对撞实验中最先观察到三喷注这一历史事实,论证了可视喷注的相对横动量kt.在5—10GeV/c的范围.并通过一个具体例子说明,只有kt在这一范围时才能正确地判定事件中的喷注数.仔细比较了由不同kt得到的喷注内部的动力学起伏,发现只有kt在5—10GeV/c范围时,喷注内部系统才有最好的反常标度性.从而得到,可视喷注的标度是kt～5—10GeV/c.讨论了这一标度和微扰QCD的标度1—2GeV之间的关系.
The scale for visible jets produced in e + e- Collisions is studied in some details using Monte Carlo method. It
is demonstrated, based on the historical fact that the 3 - jet events were firstly observed in e+ e- experiments at s^(1/s)= 17-30GeV,and the relative transverse momentum for visible jets is in the region k, - 5-10GeV/c . It is further shown, using a concrete example, that the number of jets in an event could be correctly evaluated only when kt is in this region. The dynamical fluctuations inside jets determined through different values of kt are compared carefully. It turns out that only when kt, - 5-10GeV/c the dynamical fluctuations inside jets will possess the best anomalous scaling property. The relation between the scale 5-10GeV/c of visible jets and the scale 1-2GeV of perturbative QCD is discussed.
出处
《高能物理与核物理》
CSCD
北大核心
2003年第1期7-11,共5页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金(19975018
90103019)资助~~
