标题： eikonal近似失效及在维度5希格斯-胶子耦合存在下Reggeization的保留 显示英文标题

标题： On the breakdown of eikonal approximation and survival of Reggeization in presence of dimension-5 Higgs-gluon coupling

摘要： 我们考虑在无限顶夸克质量极限下，胶子与再生胶子和希格斯玻色子相互作用的一环有效顶点，该顶点由一个维度为5的不可重正化的算符描述。 该顶点进入高能质子-质子碰撞中希格斯玻色子前向包含产率微分截面的计算，可能与反向喷注或识别出的强子有关，在一个对能量的次领头对数进行所有阶次重求和的框架中。 有效顶点是从部分子-部分子碰撞中希格斯产生两到两散射振幅的高能行为中提取出来的，并依赖于这些振幅的Regge形式的有效性。 我们发现，对于Regge极限的通常eikonal近似（Gribov规定）以及该极限下的已知区域展开技术会导致振幅结果不完整。 这种差异追溯到所涉及算符的不可重正化性质。 然而，精确QCD振幅的Regge极限在单环阶次下与Regge极交换形式一致，非平凡地支持了Regge化假设。 显示英文摘要

摘要： We consider the one-loop effective vertex for the interaction of a gluon with a Reggeized gluon and a Higgs boson in the infinite-top-mass limit, which is described by a dimension-5 non-renormalizable operator. This vertex enters the calculation of differential cross sections for the forward inclusive production of a Higgs boson in high-energy proton-proton collisions, possibly in association with a backward jet or identified hadron, in a framework where next-to-leading logarithms of the energy are resummed to all orders. The effective vertex is extracted from the high-energy behavior of two-to-two amplitudes for the Higgs production in parton-parton collisions and relies on the validity of the Regge form for these amplitudes. We find that the usual eikonal approximation (Gribov prescription) for the Regge limit and the known region-expansion techniques in this limit lead to an incomplete result for the amplitude. The discrepancy is traced back to the non-renormalizable nature of the involved operator. However, the Regge limit of the exact QCD amplitude agrees with the Regge-pole exchange form at one loop, nontrivially supporting the Reggeization hypothesis.