论文标题
二维QCD中内在魅力的Parton分布
Parton distribution of intrinsic charm in two dimensional QCD
论文作者
论文摘要
我们对“ hooft”模型中的轻媒体中的固有魅力内容进行了详细的调查，即，二维QCD大$ n_c $限制。光媒体的固有魅力分布函数（PDF）首先以$ n_c^{ - 1} $出现，以浅膜的hooft shoft波函数和激发魅力的介子的无限塔表示，明确表示。我们还从介子云模型（MCM）和Brodsky-Hoyer-Peterson-Sakai（BHPS）模型的二维对应物中得出功能形式。然后，我们在严格的结果和模型预测之间进行定量比较。我们还研究了固有魅力PDF的曲线如何随魅力夸克质量而变化。发现光中膜内的魅力夸克所携带的平均动量分数的速度比$ M_C^{ - 4} $更快，随着Charm Quark质量的增加。
We present a detailed investigation on the intrinsic charm content in a light meson within the 't Hooft model, namely, the two-dimensional QCD in large $N_c$ limit. The intrinsic charm parton distribution function (PDF) of a light meson, which first arises at order $N_c^{-1}$, is explicitly expressed in terms of the 't Hooft wave functions of the light meson and an infinite towers of excited charmed mesons. We also derive the functional forms from the two-dimensional counterparts of the meson cloud model (MCM) and Brodsky-Hoyer-Peterson-Sakai (BHPS) model. We then make a quantitative comparison between our rigorous results and model predictions. We also study how the profile of the intrinsic charm PDF varies with charm quark mass. The average momentum fraction carried by the charm quark inside a light meson is found to decrease faster than $m_c^{-4}$ with increasing charm quark mass.
