论文标题
具有异常阈值和单位性的耦合通道系统
A coupled-channel system with anomalous thresholds and unitarity
论文作者
论文摘要
我们考虑使用$ d \，π，d \，η，d_s \ b k，d^*π，d^*η，d^**\ bar k $耦合的频道，$ j^p = 1^ - $部分波浪中的各种现象是一个适用于a n a n a n a a n thresh thress的变化，上，下来和奇怪的夸克群众。我们在手性Lagrangian中使用一组LEC，这些LEC已调整为大量晶格QCD结果。列出了六个相移和非弹性参数，以用于针对质量质量的各种选择。对于150 MeV的pion质量，没有遇到异常的阈值。从150 MEV到145 MeV pion质量的微小变化会引起异常阈值对相移的巨大影响。
We consider the isospin one-half example system, with $D \,π, D\,η, D_s \bar K, D^* π, D^*η, D^*\bar K$ coupled channels in the $J^P = 1^-$ partial wave, chosen such that various phenomena that come with the opening of an anomalous threshold can be illustrated in a step-wise procedure by a suitable variation of up, down and strange quark masses. We use a set of LEC in the chiral Lagrangian that were adjusted to a large set of Lattice QCD results. The six phase shifts and inelasticity parameters are presented for various choices of the pion mass. For a pion mass of 150 MeV there are no anomalous thresholds encountered. The small change from 150 MeV to 145 MeV pion mass causes a dramatic impact of the anomalous threshold on the phase shifts.
