| 高能电子-正电子碰撞中产生喷注的标度 |
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| 引用本文： | 林晓燕,刘连寿. 高能电子-正电子碰撞中产生喷注的标度[J]. 中国物理 C, 2003, 27(1): 7-11 |
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| 作者姓名： | 林晓燕 刘连寿 |
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| 作者单位： | 华中师范大学粒子物理研究所，华中师范大学粒子物理研究所 武汉 430079 国家理科(物理学)科学研究与教学人才培养基地班的学生，武汉 430079 |
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| 基金项目： | 国家自然科学基金(19975018,90103019)资助~~ |
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| 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=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.
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| 关 键 词： | 高能电子-正电子碰撞 喷注 标度 反常标度性 |
| 收稿时间： | 2002-04-25 |
Scale for the Production of Jets in High Energy e + e- Collisions |
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| LIN Xiao-Yan LIU Lian-ShouInstitute of Particle Physics,Huazhong Normal University,Wuhan ,China. Scale for the Production of Jets in High Energy e + e- Collisions[J]. High Energy Physics and Nuclear Physics, 2003, 27(1): 7-11 |
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| Authors: | LIN Xiao-Yan LIU Lian-ShouInstitute of Particle Physics Huazhong Normal University Wuhan China |
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| Affiliation: | LIN Xiao-Yan LIU Lian-ShouInstitute of Particle Physics,Huazhong Normal University,Wuhan 430079,China |
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| Abstract: | The scale for visible jets produced in e + e- Collisions is studied in some details using Monte Carlo method. Itis 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. |
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| Keywords: | high energy e+e- collisions jets scale anomalous scaling |
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