论文标题
朝着全息光前QCD中的单一比例依赖性波梅隆
Towards a single scale-dependent Pomeron in holographic light-front QCD
论文作者
论文摘要
Pomeron regge轨迹是高能在高能量下的辐射总截面和衍射反应的动力学依赖性的基础。 Pomeron的物理学与靶标强体的Gluon分布函数和Gluon重力形式密切相关。在本文中，我们研究了核子中非扰动性gluon分布的规模依赖性和先前文章中得出的[物理学。 Rev. D 104，114005（2021）]在全息光front QCD框架和委内兹亚诺模型中。我们认为，Gluon分布函数的QCD演变$ g（x，μ）$ $ $μ^2 $导致单个比例依赖性波美龙。由此产生的Pomeron轨迹$α_p（t，μ）$不仅取决于动量转移平方$ t $，而且还取决于振幅的物理规模$μ$，例如相互作用的光子的虚拟性$ q^2 $包含衍射电电的相互作用光子。这不仅可以解释质子结构函数的$ q^2 $演变$ f_2（x，q^2）$在小$ x $上，还可以解释观察到的能量和$ q^2 $依赖于涉及到LHC能量的虚拟光子的高能衍射过程的依赖性。
The Pomeron Regge trajectory underlies the dynamics dependence of hadronic total cross sections and diffractive reactions at high energies. The physics of the Pomeron is closely related to the gluon distribution function and the gluon gravitational form factor of the target hadron. In this article we examine the scale dependence of the nonperturbative gluon distribution in the nucleon and the pion which was derived in a previous article [Phys. Rev. D 104, 114005 (2021)] in the framework of holographic light-front QCD and the Veneziano model. We argue that the QCD evolution of the gluon distribution function $g(x,μ)$ to large $μ^2$ leads to a single scale-dependent Pomeron. The resulting Pomeron trajectory $α_P(t, μ)$ not only depends on the momentum transfer squared $t$, but also on the physical scale $μ$ of the amplitude, such as the virtuality $Q^2$ of the interacting photon in inclusive diffractive electroproduction. This can explain not only the $Q^2$ evolution of the proton structure function $F_2(x,Q^2)$ at small $x$, but also the observed energy and $Q^2$ dependence of high energy diffractive processes involving virtual photons up to LHC energies.
