论文标题
QCD的开放式扇区中的手性远距离力量耦合通道动力学
Coupled-channel dynamics with chiral long-range forces in the open-charm sector of QCD
论文作者
论文摘要
我们根据手性su（3）拉格朗日对开放式扇区中的晶格QCD数据进行分析。调整低能量常数，以从HPQCD，ETMC和HSC的晶格QCD集合上恢复开放式介子质量，其倾斜和kaon块小于550 MeV。只有在我们的全球拟合中包含有关散射观测值的最新信息时，才能获得一组重要的低能参数。我们的分析首次考虑了先前由一位作者先前根据广义潜在方法（GPA）开发的左手切割的效果。在这里，我们在一环级别使用耦合通道交互项。弹性S波和P-Wave $ d \，π$，$ d k $和$ d \ bar k $散射相位偏移，忠实地重现了名义性斜向大约239 MeV和391 MEV的合奏中。基于这样的低能参数，我们预测物理夸克质量的S和P波相移和非弹性，其中相移中的统计不确定性始终小于1度。最引人注目的是异国情调的S-Wave $D_Sπ$通道，我们预测该相位移位经过90度的共振状态约为2.287 GEV。
We perform an analysis of Lattice QCD data in the open-charm sector based on the chiral SU(3) Lagrangian. The low-energy constants are adjusted to recover the open-charm meson masses on Lattice QCD ensembles from HPQCD, ETMC and HSC with pion and kaon masses smaller than 550 MeV. A significant set of low-energy parameters is obtainable only if the most recent information from HSC on scattering observables is included in our global fit. For the first time our analysis considers the effect of left-hand cuts as developed in terms of a generalized potential approach (GPA) previously by one of the authors. Here we use coupled-channel interaction terms at the one-loop level. The elastic s-wave and p-wave $D\,π$, $D K $ and $D \bar K $ scattering phase shifts on ensembles with nominal pion masses of about 239 MeV and 391 MeV are reproduced faithfully. Based on such low-energy parameters we predict s- and p-wave phase shifts and inelasticities at physical quark masses, where the statistical uncertainties in the phase shifts are smaller than 1 degree always. Most striking would be the exotic s-wave $D_s π$ channel, for which we predict a resonance state at about 2.287 GeV where the phase shift passes through 90 degrees.
