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arXiv 2103.11323hep-phhep-lat
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开美系统的手征激发

Chiral excitations of open-beauty systems

Xiao-Yu Guo, Matthias F. M. Lutz

摘要:

我们研究了由手征SU(3)拉格朗日量预测的开美介子和Goldstone玻色子的散射。计算了次主导级手征相互作用对具有$J^P= 0^+$和$J^P=1^+$量子数体系的影响。我们估计相关的低能量系数的开魅扇区,其值已被确定以前从QCD晶格数据集。通过将$B$ -介子基态手征质量公式与重夸克有效理论的质量公式相匹配,估计了首阶重夸克对称性破缺效应.我们的味道反三重态和六重态共振,动态产生的耦合通道相互作用的精细预测。

英文摘要:

We study the scattering of open-beauty mesons and Goldstone bosons as predicted by the chiral SU(3) Lagrangian. The impact of subleading order chiral interactions to systems with $J^P= 0^+$ and $J^P=1^+$ quantum numbers is worked out. We estimate the relevant low-energy coefficients from the open-charm sector, for which their values have been determined previously from sets of QCD lattice data. The leading order heavy-quark symmetry breaking effects are estimated by matching the $B$-meson ground-state chiral mass formula to the mass formula from the heavy-quark effective theory. We make refined predictions for the flavor anti-triplet and sextet resonances that are generated dynamically by coupled-channel interactions.

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