arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1902.08158hep-ph
收藏

从射流速率的整体拟合高精度确定$α_s$

High precision determination of $α_s$ from a global fit of jet rates

Andrii Verbytskyi, Andrea Banfi, Adam Kardos, Pier Francesco Monni, Stefan Kluth, Gábor Somogyi, Zoltán Szőr, Zoltán Trócsányi, Zoltán Tulipánt, Giulia Zanderighi

摘要:

我们提出了国家的最先进的提取的强耦合的基础上N $^3$ LO+NNLL准确的预测在达勒姆聚类算法在$e^+e^-$碰撞,以及同时适合的两个和三个喷气率考虑到两个观测之间的相关性。拟合进行了大范围的数据集收集在LEP和PETRA对撞机,能量从$35$ GeV到$207$ GeV。由于所使用的预测的高精度,微扰的不确定性是相当小的,由于强子化。我们对$Z$质量的最佳测定是$α_s(M_Z) = 0.11881 \pm 0.00063(exp.) \pm 0.00101(hadr.) \pm 0.00045(ren.) \pm 0.00034(res.)$,它与最新的世界平均值一致,并且具有相当的总不确定度。

英文摘要:

We present state-of-the-art extractions of the strong coupling based on N$^3$LO+NNLL accurate predictions for the two-jet rate in the Durham clustering algorithm at $e^+e^-$ collisions, as well as a simultaneous fit of the two- and three-jet rates taking into account correlations between the two observables. The fits are performed on a large range of data sets collected at LEP and PETRA colliders, with energies spanning from $35$ GeV to $207$ GeV. Owing to the high accuracy of the predictions used, the perturbative uncertainty is considerably smaller than that due to hadronization. Our best determination at the $Z$ mass is $α_s(M_Z) = 0.11881 \pm 0.00063(exp.) \pm 0.00101(hadr.) \pm 0.00045(ren.) \pm 0.00034(res.)$, which is in agreement with the latest world average and has a comparable total uncertainty.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑