Asymptotically free partons at high-energy
Asymptotically free partons at high-energy
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高能渐近自由部分子
DOI：
10.1016/s0370-2693(97)00625-4
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发表时间：
1997
影响因子：
4.4
通讯作者：
S. Forte
中科院分区：
文献类型：
--
作者：
R. Ball;S. Forte
本文描述了重整化群改进的微扰QCD在高质心能量但相对低光子虚度的轻子-强子非弹性散射中的应用。我们构造了一个高能量分解定理，它补充了用于高虚拟性过程的质量分解定理。从它，我们推导出一个重正化群方程，在高能量的所有大的resums，从而扩展到这个政权的渐近自由，从而全方位的微扰计算技术。我们讨论了这个方程的解决方案在各种限制，特别是表明，高能量的物理截面的行为是一致的现象学的期望和么正性界限。
We describe the application of renormalization group improved perturbative QCD to inelastic lepton-hadron scattering at high centre-of-mass energy but comparatively low photon virtuality. We construct a high energy factorization theorem which complements the mass factorization theorem used for processes with high virtualities. From it we derive a renormalization group equation which resums all large logarithms at high energy, thereby extending to this regime asymptotic freedom and thus the full range of perturbative computational techniques. We discuss the solution of this equation in various limits, and in particular show that the high energy behaviour of physical cross sections is consistent with phenomenological expectations and unitarity bounds.