Reggeon不可因式分解与DVCS中的J=0固定极点
Reggeon Non-Factorizability and the J=0 Fixed Pole in DVCS
摘要：
我们认为，深虚康普顿散射将显示Regge行为nu^alpha_R（t）在高能量和固定的t，即使在高光子虚拟，不一定是传统的缩放。一种观察的方法是追踪Reggeon对夸克-核子散射的贡献，并注意到由此产生的广义Parton分布在断点处会有发散行为。此外，我们表明，直接双光子夸克耦合将在大$t$，它占主导地位的DVCS振幅大的能量。这种贡献，J=0固定极，应该是未来DVCS实验计划的一部分，在Jlab或LHeC。
英文摘要：
We argue that deeply virtual Compton scattering will display Regge behavior nu^alpha_R(t) at high energy at fixed-t, even at high photon virtuality, not necessarily conventional scaling. A way to see this is to track the Reggeon contributions to quark-nucleon scattering and notice that the resulting Generalized Parton Distributions would have divergent behavior at the break-points. In addition, we show that the direct two-photon to quark coupling will be accessible at large $t$ where it dominates the DVCS amplitude for large energies. This contribution, the J=0 fixed-pole, should be part of the future DVCS experimental programs at Jlab or LHeC.
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