标题： 带有域墙费米子的重轻介子 显示英文标题

标题： Heavy-light mesons with domain wall fermions

摘要： 我们使用截断的DBW2规范配置，在约3 GeV的格点截断下展示RBC重轻介子谱学。 重夸克和轻夸克都由域墙费米子（DWF）描述。 重夸克质量范围在0.1到0.4格点单位之间，涵盖了魅夸克。 轻夸克质量范围在0.008到0.04之间，涵盖了奇异夸克。 特别是，我们讨论自旋宇称JP= 0+/-和1+/-的魅夸克（D和D*）和魅-奇异（Ds和DsJ）介子。 初步结果表明，在这个截断下，DWF能够描述截断DBW2集合中的魅夸克。 JP=0+/-和1+/-的D、D*、Ds和DsJ介子态的质量在几%以内得到了很好的再现；它们的宇称分裂，DeltaJ，比以前的工作更好地再现，只有10-20%的高估；实验观察到非奇异态的分裂大于奇异态的分裂也得到了再现；但超精细分裂只再现了60-65%。 关于重夸克质量的依赖性，当重夸克质量超过0.2-0.3格点单位时，J=0和J=1的宇称分裂是简并的；当重夸克质量进一步减小时，J=0的宇称分裂增加，而J=1的分裂则不变化。 显示英文摘要

摘要： We present RBC heavy-light meson spectroscopy with quenched DBW2 gauge configurations at lattice cutoff of about 3 GeV. Both heavy and light quarks are described by domain-wall fermions (DWF). The heavy quark mass ranges between 0.1 and 0.4 lattice units, covering charm. The light quark mass ranges between 0.008 and 0.04, covering strange. In particular, we discuss charmed (D and D*) and charm-strange (Ds and DsJ) mesons with spin-parity JP= 0+/- and 1+/-. The preliminary results indicate that DWF describe charm on the quenched DBW2 ensemble at this cutoff. The masses of the JP=0+/- and 1+/- D, D*, Ds and DsJ meson states are well reproduced to within a few %; their parity splitting, DeltaJ, are better reproduced than previous works, with only 10-20 % over estimations; the experimental observation that the splitting for non-strange states is bigger than that for strange states is reproduced as well; but the hyperfine splittings are only 60-65 % reproduced. Regarding the depenence on heavy quark mass, J=0 and J=1 parity splittings are degenerate for heavy quark mass heavier than 0.2-0.3 lattice units a; the J=0 parity splitting increases as the heavy quark mass decreases further while the J=1 splitting does not.