Nucleon Structure Functions from Operator Product Expansion on the Lattice.
Nucleon Structure Functions from Operator Product Expansion on the Lattice.
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DOI：
10.1103/physrevlett.118.242001
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发表时间：
2017-03
影响因子：
8.6
通讯作者：
A. Chambers;R. Horsley;Y. Nakamura;H. Perlt;P. Rakow;G. Schierholz;A. Schiller;K. Somfleth;Ross D. Young;J. Zanotti
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文献类型：
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作者：
A. Chambers;R. Horsley;Y. Nakamura;H. Perlt;P. Rakow;G. Schierholz;A. Schiller;K. Somfleth;Ross D. Young;J. Zanotti
在实验室和晶格上的深度非弹性散射，对于理解核子是如何由夸克和胶子构成的，是最有启发性的。长期目标是从第一原理计算相关的结构函数。到目前为止，这仅限于模型计算。在这封信中，我们提出了一种新的方法来计算的结构函数直接从虚拟的，无所不包的康普顿振幅，利用运营商的产品展开。这克服了重整化和算子混合的问题，到目前为止，这些问题阻碍了幂修正和更高矩的晶格计算。
Deep-inelastic scattering, in the laboratory and on the lattice, is most instructive for understanding how the nucleon is built from quarks and gluons. The long-term goal is to compute the associated structure functions from first principles. So far this has been limited to model calculations. In this Letter we propose a new method to compute the structure functions directly from the virtual, all-encompassing Compton amplitude, utilizing the operator product expansion. This overcomes issues of renormalization and operator mixing, which so far have hindered lattice calculations of power corrections and higher moments.