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arXiv 2012.04716hep-phhep-ex
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精密物理学与包容性QCD工艺

Precision physics with inclusive QCD processes

Antonio Pich

摘要:

强子通过电弱电流的包容性生产可以用短程理论工具进行严格分析。相关的观测量对所涉及的强相互作用的红外行为不敏感,允许非常精确的量子色动力学测试。对$σ(e^+e^-\to\mathrm{hadrons})$和$τ$轻子、$Z$、$W$和希格斯玻色子的强子衰变宽度的理论预言已经达到了令人印象深刻的$\mathcal{O}(α_s^4)$的精度。对$Z$和$τ$强子宽度的精确实验测量使得在两个非常不同的能量尺度上精确确定强耦合成为可能,为渐近自由提供了非常重要的实验验证。这些过程的理论描述和他们目前的唯象状态的详细讨论。最精确的测定$α_s$从其他来源也进行了简要审查,并与完全包容的结果进行比较。

英文摘要:

The inclusive production of hadrons through electroweak currents can be rigorously analysed with short-distance theoretical tools. The associated observables are insensitive to the involved infrared behaviour of the strong interaction, allowing for very precise tests of Quantum Chromodynamics. The theoretical predictions for $σ(e^+e^-\to\mathrm{hadrons})$ and the hadronic decay widths of the $τ$ lepton and the $Z$, $W$ and Higgs bosons have reached an impressive accuracy of $\mathcal{O}(α_s^4)$. Precise experimental measurements of the $Z$ and $τ$ hadronic widths have made possible the accurate determination of the strong coupling at two very different energy scales, providing a highly significant experimental verification of asymptotic freedom. A detailed discussion of the theoretical description of these processes and their current phenomenological status is presented. The most precise determinations of $α_s$ from other sources are also briefly reviewed and compared with the fully-inclusive results.

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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