Lattice QCD evaluation of the Compton amplitude employing the Feynman-Hellmann theorem
Lattice QCD evaluation of the Compton amplitude employing the Feynman-Hellmann theorem
复制标题
使用 Feynman-Hellmann 定理对康普顿振幅进行格子 QCD 评估
作者:
K. U. Can;A. Hannaford;R. Horsley;Y. Nakamura;H. Perlt;P. Rakow;G. Schierholz;K. Somfleth;H. Stüben;R. Young;J. Zanotti
The forward Compton amplitude describes the process of virtual photon scattering from a hadron and provides an essential ingredient for the understanding of hadron structure. As a physical amplitude, the Compton tensor naturally includes all target mass corrections and higher twist effects at a fixed virtuality, $Q^2$. By making use of the second-order Feynman-Hellmann theorem, the nucleon Compton tensor is calculated in lattice QCD at an unphysical quark mass across a range of photon momenta $3 \lesssim Q^2 \lesssim 7$ GeV$^2$. This allows for the $Q^2$ dependence of the low moments of the nucleon structure functions to be studied in a lattice calculation for the first time. The results demonstrate that a systematic investigation of power corrections and the approach to parton asymptotics is now within reach.
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影响因子:
5
作者:
Jiunn-Wei Chen;T. Ishikawa;Luchang Jin;Huey-Wen Lin;Yi-Bo Yang;Jian-Hui Zhang;Yong Zhao
通讯作者:
Jiunn-Wei Chen;T. Ishikawa;Luchang Jin;Huey-Wen Lin;Yi-Bo Yang;Jian-Hui Zhang;Yong Zhao
影响因子:
5
作者:
A. Chambers;R. Horsley;A. Schiller;H. Stüben;D. Pleiter;D. Pleiter;J. Zanotti;H. Perlt;Y. Nakamura;P. Rakow;G. Schierholz;R. Young
通讯作者:
A. Chambers;R. Horsley;A. Schiller;H. Stüben;D. Pleiter;D. Pleiter;J. Zanotti;H. Perlt;Y. Nakamura;P. Rakow;G. Schierholz;R. Young
影响因子:
8.6
作者:
A. Chambers;R. Horsley;Y. Nakamura;H. Perlt;P. Rakow;G. Schierholz;A. Schiller;K. Somfleth;Ross D. Young;J. Zanotti
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
影响因子:
4.4
作者:
Bietenholz W
通讯作者:
Bietenholz W
影响因子:
2.8
作者:
Alexandrou, Constantia;Cichy, Krzysztof;Steffens, Fernanda
通讯作者:
Steffens, Fernanda