论文标题
激体对电磁过渡的影响
Instanton effects on electromagnetic transitions of charmonia
论文作者
论文摘要
我们研究了Charmonia的质谱和电磁跃迁，强调了对它们的偶然作用。夸张的潜力由一绿化交换的库仑样潜力和线性限制电位组成。我们介绍了源自激体真空的非扰动重型夸克电势。我们还考虑了筛选的限制电位，它更好地描述了更高激发态的电磁衰变。利用这种改善的夸克电势，我们计算了柴果的质谱和电磁衰变。关注激体效应，我们讨论了与实验数据以及其他作品的结果相比。激体效应对柴的电磁衰变是边缘的。
We investigate the mass spectrum and electromagnetic transitions of charmonia, emphasizing the instanton effects on them. The heavy-quark potential consists of the Coulomb-like potential from one-gluon exchange and the linear confining potential. We introduce the nonperturbative heavy-quark potential derived from the instanton vacuum. We also consider the screened confining potential, which better describes the electromagnetic decays of higher excited states. Using this improved heavy-quark potential, we compute the mass spectrum and electromagnetic decays of the charmonia. Focusing on the instanton effects, we discuss the results compared with the experimental data and those from other works. The instanton effects are marginal on the electromagnetic decays of charmonia.
