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arXiv 2001.05090hep-lathep-phnucl-th
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核子康普顿振幅的标度和高扭曲

Scaling and higher twist in the nucleon Compton amplitude

A. Hannaford-Gunn, R. Horsley, Y. Nakamura, H. Perlt, P. E. L. Rakow, G. Schierholz, K. Somfleth, H. Stüben, R. D. Young, J. M. Zanotti

摘要:

强子的部分子结构在大量的高能和核物理实验中起着重要的作用。它也支持了对强子结构的理论理解。格点量子色动力学的最新发展为从第一性原理可靠地研究部分子结构提供了新的机会。在这里,我们报告的使用Feynman-Hellmann定理研究前康普顿振幅在非物理区域。我们演示了如何这个振幅提供直接约束强子非弹性结构函数。使用外部动量转移,使我们能够研究的$Q^2$的演变,探索渐近标度的开始,并揭示更高的扭曲效应的部分子结构。

英文摘要:

The partonic structure of hadrons plays an important role in a vast array of high-energy and nuclear physics experiments. It also underpins the theoretical understanding of hadron structure. Recent developments in lattice QCD offer new opportunities for reliably studying partonic structure from first principles. Here we report on the use of the Feynman-Hellmann theorem to study the forward Compton amplitude in the unphysical region. We demonstrate how this amplitude provides direct constraint on hadronic inelastic structure functions. The use of external momentum transfer allows us to study the $Q^2$ evolution to explore the onset of asymptotic scaling and reveal higher-twist effects in partonic structure.

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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