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arXiv 1107.4638hep-ph
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具有大量外费米子线的双环QED算子矩阵元

Two-loop QED Operator Matrix Elements with Massive External Fermion Lines

Johannes Blümlein, Abilio De Freitas, Wilhelmus van Neerven

摘要:

本文计算了量子电动力学(QED)中费米子局域扭转-2算符与外部质量费米子线的双圈质量算符矩阵元,直到维数参数$ε= D - 4$中的常数项.本文研究了文献\cite{BBN}的假设,即除了$O((m_f^2/s)^k), k \geq 1$的幂修正外,$e^+e^-$湮灭为虚中性规范玻色子的双圈QED初态修正可以用这些矩阵元和Drell-Yan过程的无质量双圈Wilson系数来表示。

英文摘要:

The two-loop massive operator matrix elements for the fermionic local twist--2 operators with external massive fermion lines in Quantum Electrodynamics (QED) are calculated up to the constant terms in the dimensional parameter $ε= D - 4$. We investigate the hypothesis of Ref. \cite{BBN} that the 2--loop QED initial state corrections to $e^+e^-$ annihilation into a virtual neutral gauge boson, except power corrections of $O((m_f^2/s)^k), k \geq 1$, can be represented in terms of these matrix elements and the massless 2-loop Wilson coefficients of the Drell-Yan process.

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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