论文标题
基于与散射插值操作员在源和水槽处的散射插值的相关函数的抗抗抗抗光灯的晶格QCD研究
Lattice QCD study of antiheavy-antiheavy-light-light tetraquarks based on correlation functions with scattering interpolating operators both at the source and at the sink
论文作者
论文摘要
我们介绍了最近开始的晶格QCD研究的第一个结果，对抗抗抗抗光灯的轻度tetraquark系统，包括散射在源和水槽处的相关函数中的插值操作员。特别是，我们讨论了这种散射插值操作员对低较低能级的精确计算的重要性。我们专注于$ \ bar b \ bar b u d $四夸克系统，带量子数$ i（j^p）= 0（1^+）$，该系统的基态低于最低的Meson-Meson阈值。我们使用Lüscher的方法进行散射分析，以推断相应的QCD稳定tetraquark的结合能量到无限的空间体积。我们的计算使用三叶草$ u $，$ d $ valence quarks和NRQCD $ b $ b $ valence Quarks在仪表链接合奏中与MILC协作产生的HISQ Sea Quarks。
We present first results of a recently started lattice QCD investigation of antiheavy-antiheavy-light-light tetraquark systems including scattering interpolating operators in correlation functions both at the source and at the sink. In particular, we discuss the importance of such scattering interpolating operators for a precise computation of the low-lying energy levels. We focus on the $\bar b \bar b u d$ four-quark system with quantum numbers $I(J^P) = 0(1^+)$, which has a ground state below the lowest meson-meson threshold. We carry out a scattering analysis using Lüscher's method to extrapolate the binding energy of the corresponding QCD-stable tetraquark to infinite spatial volume. Our calculation uses clover $u$, $d$ valence quarks and NRQCD $b$ valence quarks on gauge-link ensembles with HISQ sea quarks that were generated by the MILC collaboration.
