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arXiv 2007.15360hep-phhep-ex
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四轻子产生和QED FSR的精度

Four lepton production and the accuracy of QED FSR

Christian Gütschow, Marek Schönherr

摘要:

我们仔细检查的能力,结合电弱虚校正的主要QED的最终状态remation工具,重现精确的次领先的顺序电弱计算在四个电荷轻子的最终状态。我们进一步研究的结果的依赖轻子光子敷料锥的大小以及共振识别策略。总的来说,我们发现很好的协议与固定顺序的结果,但部分差异不直接连接到在百分之几的水平,这是相关的精密测量,在某些情况下,观察到的干扰引起的高阶效应。

英文摘要:

We scrutinise the ability of the primary QED final-state resummation tools, combined with electroweak virtual corrections, to reproduce the exact next-to-leading order electroweak calculation in the four-charged-lepton final state. We further examine the dependence of the findings on the lepton-photon dressing-cone size as well as the resonance identification strategy. Overall we find excellent agreement with the fixed-order result, but partial differences not directly connected with resummation-induced higher-order effects at the few-percent level are observed in some cases, which are relevant for precision measurements.

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。

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