arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1607.04124hep-ph
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软壁AdS/QCD中氘的电磁结构函数和极化特性

Deuteron electromagnetic structure functions and polarization properties in soft-wall AdS/QCD

Thomas Gutsche, Valery E. Lyubovitskij, Ivan Schmidt

摘要:

我们应用软壁AdS/QCD方法描述了氘核的结构函数和张量极化性质。目前的工作是我们以前的研究电磁形状因子的一个完成。通过适当选择有效作用量中的两个耦合,我们能够再现与微扰QCD设置的模型无关约束完全一致的形状因子和结构函数。我们的框架是基于一个五维的行动在AdS空间制定的向量场对偶的氘核和电磁场。AdS场依赖于四个Minkowski坐标和一个全息坐标$z$。形状因子和结构函数的标度依赖性与夸克计数规则一致,这意味着电荷形状因子$G_C(Q^2)$、结构函数$A(Q^2)$和$B(Q^2)$的$1/Q^{10}$行为,以及磁性$G_M(Q^2)$和四极$G_Q(Q^2)$形状因子的$1/Q^{12}$行为。

英文摘要:

We apply a soft-wall AdS/QCD approach to the description of deuteron structure functions and tensor polarized properties. Present work is a completion of our previous study on electromagnetic form factors. By the appropriate choice of two couplings in the effective action we are able to reproduce both the form factors and structure functions in full consistency with model-independent constraints set by perturbative QCD. Our framework is based on a five-dimensional action in AdS space formulated in terms of vector fields dual to the deuteron and the electromagnetic fields. The AdS fields depend on four Minkowski and one holographic coordinate $z$. The scale dependence of the form factors and structure functions is consistent with quark counting rules implying the $1/Q^{10}$ behavior of the charge form factor $G_C(Q^2)$, structure functions $A(Q^2)$ and $B(Q^2)$, and the $1/Q^{12}$ behavior of the magnetic $G_M(Q^2)$ and quadrupole $G_Q(Q^2)$ form factors.

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