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arXiv 2001.04986hep-phhep-ex
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为什么不同时确定部分子分布就不能从强子过程确定$α_s$

Why $α_s$ Cannot be Determined from Hadronic Processes without Simultaneously Determining the Parton Distributions

Stefano Forte, Zahari Kassabov

摘要:

我们发现,任何决定强耦合$α_s$从一个过程,这取决于部分子分布,如强子过程或深非弹性散射,一般不会导致一个正确的结果,除非部分子分布(PDF)同时确定与$α_s$。我们建立的结果,首先显示一个明确的例子,然后认为,该例子是一个通用的情况下,我们解释使用模型的形状相等的$χ^2$轮廓在联合空间的$α_s$和PDF参数的代表。

英文摘要:

We show that any determination of the strong coupling $α_s$ from a process which depends on parton distributions, such as hadronic processes or deep-inelastic scattering, generally does not lead to a correct result unless the parton distributions (PDFs) are determined simultaneously along with $α_s$. We establish the result by first showing an explicit example, and then arguing that the example is representative of a generic situation which we explain using models for the shape of equal $χ^2$ contours in the joint space of $α_s$ and the PDF parameters.

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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