O(alpha(2)(s)) contributions to the longitudinal fragmentation function in e(+)e(-) annihilation

被引：80
|
作者：
Rijken, PJ
vanNeerven, WL
机构：
[1] Instituut-Lorentz, University of Leiden, 2300 RA Leiden
来源：
PHYSICS LETTERS B | 1996年 / 386卷 / 1-4期
关键词：
D O I：
10.1016/0370-2693(96)00898-2
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the order alpha(s)(2) contributions to the coefficient functions corresponding to the longitudinal fragmentation function F-L(x, Q(2)). A comparison with the leading order alpha(s) result for F-L(x, Q(2)) shows that the corrections are large and vary from 44% to 67% in the region 0.01 < x < 0.9 at Q(2) = M(Z)(2). Our calculations also reveal that the ratio of the longitudinal and total cross section sigma(L)/sigma(tot) amounts to 0.054. This number is very close to the most recent value obtained by the OPAL collaboration which obtained 0.057 +/- 0.005.
引用
收藏
页码：422 / 428
页数：7
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