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arXiv 2107.01293hep-phhep-ex
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非单态结构函数PDMATHAAD $F^{\rm NS}_2(x,Q^2)$和$g_1^{\rm NS}(x,Q^2)$的N $^3$ LO模式不变QCD演化

The N$^3$LO Scheme-invariant QCD Evolution of the Non-singlet Structure Functions \boldmath $F^{\rm NS}_2(x,Q^2)$ and $g_1^{\rm NS}(x,Q^2)$

J. Blümlein, M. Saragnese

摘要:

本文给出了结构函数$F_2(x,Q^2)$和$g_1(x,Q^2)$的非极化和极化味非单重态演化方程.相应的演变是基于起始尺度$Q_0^2$下非单重态结构函数的实验测量。这样的演化只依赖于强耦合常数$α_s(M_Z)$或QCD标度$Λ_{\rm QCD}$以及粲夸克和底夸克的质量$m_c$和$m_b$,为未来高亮度深度非弹性散射实验中测量强耦合常数提供了一种最干净的方法。4圈反常维度的未知部分在这个分析中只引入了一个边际误差。

英文摘要:

We present the scheme-invariant unpolarized and polarized flavor non-singlet evolution equation to N$^3$LO for the structure functions $F_2(x,Q^2)$ and $g_1(x,Q^2)$ including the charm- and bottom quark effects in the asymptotic representation. The corresponding evolution is based on the experimental measurement of the non-singlet structure functions at a starting scale $Q_0^2$. In this way the evolution does only depend on the strong coupling constant $α_s(M_Z)$ or the QCD scale $Λ_{\rm QCD}$ and the charm and bottom quark masses $m_c$ and $m_b$ and provides one of the cleanest ways to measure the strong coupling constant in future high luminosity deep-inelastic scattering experiments. The yet unknown parts of the 4-loop anomalous dimensions introduce only a marginal error in this analysis.

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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