论文标题
来自物理点附近的晶格QCD的诱人的重子频谱
Charmed baryon spectrum from lattice QCD near the physical point
论文作者
论文摘要
We calculate the low-lying spectrum of charmed baryons in lattice QCD on the $32^3\times64$, $N_f=2+1$ PACS-CS gauge configurations at the almost physical pion mass of $\sim 156$ MeV/c$^2$.通过使用一组具有不同狄拉克结构和夸克场涂片的插值操作员进行变化分析，我们提取了旋转$ 1/2 $的地面和前几个激发态，并旋转$ 3/2 $，单独，双重，双重，三重固定。此外，我们研究了$ξ_c$ - $ξ_c^\ prime $混合和激发态在各种方法中的操作员依赖性。我们确定了几个位于实验观察到的$σ_c$，$ξ_c$和$ω_c$ baryons的激发态的状态，其中包括LHCB最近报告的$ξ_c$ nates。我们对双重和三重锻造的重子的结果提示了将来的实验。
We calculate the low-lying spectrum of charmed baryons in lattice QCD on the $32^3\times64$, $N_f=2+1$ PACS-CS gauge configurations at the almost physical pion mass of $\sim 156$ MeV/c$^2$. By employing a set of interpolating operators with different Dirac structures and quark-field smearings for the variational analysis, we extract the ground and first few excited states of the spin-$1/2$ and spin-$3/2$, singly-, doubly-, and triply-charmed baryons. Additionally, we study the $Ξ_c$-$Ξ_c^\prime$ mixing and the operator dependence of the excited states in a variational approach. We identify several states that lie close to the experimentally observed excited states of the $Σ_c$, $Ξ_c$ and $Ω_c$ baryons, including some of the $Ξ_c$ states recently reported by LHCb. Our results for the doubly- and triply-charmed baryons are suggestive for future experiments.
