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arXiv 0802.0408hep-phhep-ex
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高阶结构函数F_2^p(x,Q^2)和F_2^d(x,Q^2)的高扭贡献

Higher Twist Contributions to the Structure Functions F_2^p(x,Q^2) and F_2^d(x,Q^2) at Large x and Higher Orders

Johannes Blümlein, Helmut Böttcher

摘要:

Bjorken变量$x$值较大时,对深度非弹性结构函数$F_2^{p}(x,Q^2)$和$F_2^{d}(x,Q^2)$的较高扭转贡献是通过将在大$W^2$区域中测得的{扭转-2}贡献外推到应用目标质量修正的区域$4 \GeV^2 \leq W^2 \leq 12.5 \GeV^2$中提取的。我们比较了NLO、NNLO和N $^3$ LO分析的结果,并将N $^4$ LO处的大$x$与Wilson系数进行了比较。观察到从NLO到N $^4$ LO的高扭转贡献逐渐降低,这强调了高阶校正的重要性。

英文摘要:

The higher twist contributions to the deeply inelastic structure functions $F_2^{p}(x,Q^2)$ and $F_2^{d}(x,Q^2)$ for larger values of the Bjorken variable $x$ are extracted extrapolating the {twist--2} contributions measured in the large $W^2$ region to the region $4 \GeV^2 \leq W^2 \leq 12.5 \GeV^2$ applying target mass corrections. We compare the results for the NLO, NNLO and N$^3$LO analyzes and include also the large $x$ at N$^4$LO to the Wilson coefficients. A gradual lowering of the higher twist contributions going from NLO to N$^4$LO is observed, which stresses the importance of higher order corrections.

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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