Fits of αs using power corrections in the three-jet region
Fits of αs using power corrections in the three-jet region
复制标题
在三射流区域使用功率修正拟合 αs
DOI：
10.1007/jhep06(2023)058
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发表时间：
2023
影响因子：
5.4
通讯作者：
G. Zanderighi
中科院分区：
文献类型：
--
作者：
P. Nason;G. Zanderighi
在这项工作中，我们通过同时拟合强耦合常数 αs 和非微扰参数 α0，研究了三射流区域非微扰校正的最新发现对 e+e− 强子可观测量的影响。我们将推力和 C 参数已知的这些功率修正的计算扩展到其他 e+e− 强子可观测量。我们发现，对于某些可观测量，非微扰修正在两射流限制下表现得相当好，而对于其他可观测量，它们的行为则有更多问题。如果将拟合限制于三射流区域和表现良好的可观测量，通常会发现非常好的结果，提取的 αs 值与世界平均水平非常吻合。对于推力和 C 参数尤其如此，当使用解析方法计算非微扰校正时，已报告了非常小的 αs 值。此外，只要距离两射流极限足够远，问题较多的变量也能得到很好的描述，而在同一区域，它们无法使用基于两射流运动学的传统功率校正实现来描述。
In this work we study the impact of recent findings regarding non-perturbative corrections in the three-jet region to e+e− hadronic observables, by performing a simultaneous fit of the strong coupling constant αs and the non-perturbative parameter α0. We extend the calculation of these power corrections, already known for thrust and C-parameter, to other e+e− hadronic observables. We find that for some observables the non-perturbative corrections are reasonably well behaved in the two-jet limit, while for others they have a more problematic behaviour. If one limits the fit to the three-jet region and to the well-behaved observables, one finds in general very good results, with the extracted value of αs agreeing well with the world average. This is the case in particular for the thrust and C-parameter for which notably small values of αs have been reported when non-perturbative corrections have been computed using analytic methods. Furthermore, the more problematic variables are also well described provided one stays far enough from the two-jet limit, while in this same region they cannot be described using the traditional implementation of power-corrections based on two-jet kinematics.
影响因子：
5
作者：
K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli
通讯作者：
K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli
使用 JADE 数据测量 eâ 湮灭中三射流速率的强耦合 αS
DOI：
10.1140/epjc/s10052-013-2332-y
发表时间：
2013
期刊：
The European Physical Journal C
影响因子：
--
作者：
Schieck
通讯作者：
Schieck
影响因子：
4.4
作者：
Bellm, Johannes;Gieseke, Stefan;Rauch, Daniel
通讯作者：
Rauch, Daniel