论文标题
来自全息QCD的roper共振的电磁过渡幅度
Electromagnetic transition amplitude for Roper resonance from holographic QCD
论文作者
论文摘要
roper共振是核子的第一个激发态，是最完善的巴属共振之一。然而，它的属性并未通过QCD的有效模型（例如非权威主义夸克模型）始终如一地解释。在这封信中，我们在Sakai-Sugimoto模型中提出了一种替代方法，该方法是QCD的全息模型之一。特别是，我们分析了't〜hooft耦合$ 1/λ$的领先电磁过渡的螺旋幅度。该模型通过非线性介子在短距离处融合了巴里昂的结构，这些介子在长距离时被介子云包围。我们证明了在本方法中解释了最近观察到的CLA的数据。
The Roper resonance, the first excited state of the nucleon, Is one of the best-established baryon resonances. Yet, its properties have not been consistently explained by effective models of QCD, such as the non-relativistic quark model. In this letter, we propose an alternative approach in the Sakai-Sugimoto model that is one of the holographic models of QCD. In particular, we analyze the helicity amplitude of the electromagnetic transitions at the leading of 't~Hooft coupling $1/λ$. The model incorporates baryon structure at short distance by non-linear mesons surrounded by meson clouds at long distance. We demonstrate that the recently observed data by CLAS are explained in the present approach.
