标题： 介子和格点QCD中的$D_{s0}^*(2317)$介子- Kaon 散射$D$ 显示英文标题

标题： $D_{s0}^*(2317)$ Meson and $D$-Meson-Kaon Scattering from Lattice QCD

摘要： 标量介子$D_{s0}^*(2317)$在包含 DK 和$\bar sc$插值场的$J^P=0^+$通道的晶格模拟中，位于 DK 阈值以下 37(17)MeV。该模拟是在$N_f=2+1$格点规范构型上完成的，使用的是$m_\pi\simeq 156 $MeV 的 pion 质量，得到的$M_{D_{s0}^*}-\tfrac{1}{4}(M_{D_s}+3M_{D_s^*})=266(16)$MeV 接近实验值 241.5(0.8)MeV。 与标量介子相关的能级由于 DK 散射态的存在而伴随有额外的离散能级。接近阈值的能级导致负的 DK 散射长度$a_0=-1.33(20)$fm，这表明存在一个阈值以下的状态。 显示英文摘要

摘要： The scalar meson $D_{s0}^*(2317)$ is found 37(17)MeV below DK threshold in a lattice simulation of the $J^P=0^+$ channel using, for the first time, both DK as well as $\bar sc$ interpolating fields. The simulation is done on $N_f=2+1$ gauge configurations with $m_\pi\simeq 156 $MeV, and the resulting $M_{D_{s0}^*}-\tfrac{1}{4}(M_{D_s}+3M_{D_s^*})=266(16)$ MeV is close to the experimental value 241.5(0.8)MeV. The energy level related to the scalar meson is accompanied by additional discrete levels due to DK scattering states. The levels near threshold lead to the negative DK scattering length $a_0=-1.33(20)$ fm that indicates the presence of a state below threshold.