论文标题
标量和伪量表的两光子衰减宽度的晶格研究
A Lattice Study of the Two-photon Decay Widths for Scalar and Pseudo-scalar Charmonium
论文作者
论文摘要
在这项探索性研究中，使用两个$ n_f = 2 $扭曲的质量质量lattice QCD量规配置计算出两个光子衰减宽度（$η_c$）和标量（$χ_{C0} $）charmon。模拟进行了两个带有晶格间距的晶格合奏$ a = 0.067 $ fm，大小$ 32^3 \ times {64} $和$ a = 0.085 $ fm，大小$ 24^3 \ times {48} $。获得了两个charmonia的衰减宽度的结果，这些结果位于正确的球场中，但比实验较小。讨论了这些差异的可能原因。
In this exploratory study, two photon decay widths of pseudo-scalar ($η_c$) and scalar ($χ_{c0}$) charmonium are computed using two ensembles of $N_f=2$ twisted mass lattice QCD gauge configurations. The simulation is performed two lattice ensembles with lattice spacings $a=0.067$ fm with size $32^3\times{64}$ and $a=0.085$ fm with size $24^3\times{48}$, respectively. The results for the decay widths for the two charmonia are obtained which are in the right ballpark however smaller than the experimental ones. Possible reasons for these discrepancies are discussed.
