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arXiv 0908.1684hep-phhep-th
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QCD中扭四算子的重正化

Renormalization of Twist-Four Operators in QCD

V. M. Braun, A. N. Manashov, J. Rohrwild

摘要:

推广Bukhvostov,Frolov,Lipatov和Kuraev(BFLK)关于准部分子算符重整化的工作,我们导出了一套完整的进入QCD演化方程的双粒子重整化群核,其精度达到了twist-four.结果表明,包含场算符的"非部分子“分量的2->2演化核以及最显著的2->3演化核不需要独立计算,并且可以利用共形对称和洛伦兹变换从已知的准部分子算符结果中恢复出来.本文给出了由手征场构成的光线算符在特定基上的重正化核,使得共形对称性得以体现。结果可以很容易地重铸在动量空间中,在广义部分子分布的演化方程的形式。

英文摘要:

Extending the work by Bukhvostov, Frolov, Lipatov and Kuraev (BFLK) on the renormalization of quasipartonic operators we derive a complete set of two-particle renormalization group kernels that enter QCD evolution equations to twist-four accuracy. It is shown that the 2->2 evolution kernels which involve ``non-partonic'' components of field operators, and, most remarkably, also 2->3 kernels do not require independent calculation and can be restored from the known results for quasipartonic operators using conformal symmetry and Lorentz transformations. The kernels are presented for the renormalization of light-ray operators built of chiral fields in a particular basis such that the conformal symmetry is manifest. The results can easily be recast in momentum space, in the form of evolution equations for generalized parton distributions.

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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