Measurement of the strong coupling αS from the four-jet rate in e+e- annihilation using JADE data
Measurement of the strong coupling αS from the four-jet rate in e+e- annihilation using JADE data
复制标题
使用 JADE 数据测量 e+e- 湮灭中四射流速率的强耦合 αS
DOI：
10.1140/epjc/s2006-02625-4
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
The Jade Collaboration
中科院分区：
文献类型：
--
作者：
J. Schieck;S. Bethke;O. Biebel;S. Kluth;P. Fernández;C. Pahl;The Jade Collaboration
利用JADE实验收集的质心能量为14 GeV ~ 44 GeV的e+e湮没成强子的数据，研究了四喷注事件产生率随达勒姆喷注算法分辨率参数ycut的变化。四喷流率相比，QCD次领先的顺序计算，包括recremation的大规模的次领先的对数近似。从四喷流速率测量的强耦合为$ \alpha_{\text{S}}\left（M_{\text{Z}^0}\right）=0.1159\pm0.0004\text{（stat.）}\ pm0.0012\text{（exp.）}\ pm0.0024\text{（had.）}\ pm0.0007\text{（theo.）}与世界平均水平一致。
Data from e+e- annihilation into hadrons collected by the JADE experiment at centre-of-mass energies between 14 GeV and 44 GeV are used to study the four-jet event production rate as a function of the Durham jet algorithm’s resolution parameter ycut. The four-jet rate is compared to QCD next-to-leading order calculations including resummation of large logarithms in the next-to-leading logarithmic approximation. The strong coupling measured from the four-jet rate is $ \alpha_{\text{S}}\left(M_{\text{Z}^0}\right)=0.1159\pm0.0004\text{(stat.)}\pm0.0012\text{(exp.)}\pm0.0024\text{(had.)}\pm0.0007\text{(theo.)} $ in agreement with the world average.