论文标题
$ bb \ bar {u} \ bar {d} $ tetraquark在lattice上带有NRQCD底部和HISQ向上/down Quarks
Construction of $bb\bar{u}\bar{d}$ tetraquark states on lattice with NRQCD bottom and HISQ up/down quarks
论文作者
论文摘要
我们使用NRQCD操作在晶格上构建$ bb \ bar {u} \ bar {d} $状态，用于底部和HISQ操作，以供光线/下夸克。 NRQCD-HISQ TETRAQUARK运算符是为“ bound” $ [bb] [\ bar {u} \ bar {d}] $和“分子” $ [b \ bar {u}] [b \ bar {d}] $ state构建的。与这些不同的运算符相对应，需要两个不同的适当调整的轻夸克质量才能获得所需的光谱。我们根据涉及Hartree-fock计算的相对夸克模型来解释不同$ m_ {u/d} $的要求。双底三夸克状态的质谱是在三个不同晶格间距的MILC $ n_f = 2+1 $ asqtad Lattices上获得的。已经进行了分析以获得“结合”和“分子”状态对能量本征状态的相对贡献。
We construct $bb\bar{u}\bar{d}$ states on lattice using NRQCD action for bottom and HISQ action for the light up/down quarks. The NRQCD-HISQ tetraquark operators are constructed for "bound" $[bb][\bar{u}\bar{d}]$ and "molecular" $[b\bar{u}] [b\bar{d}]$ states. Corresponding to these different operators, two different appropriately tuned light quark masses are needed to obtain the desired spectra. We explain this requirement of different $m_{u/d}$ in the light of relativised quark model involving Hartree-Fock calculation. The mass spectra of double bottom tetraquark states are obtained on MILC $N_f=2+1$ Asqtad lattices at three different lattice spacings. Variational analysis has been carried out to obtain the relative contribution of "bound" and "molecular" states to the energy eigenstates.
