论文标题
带有错误栏的双重双重tetraquarks
Masses of Doubly Heavy Tetraquarks with Error Bars
论文作者
论文摘要
在重夸克的限制中，两个重型重击或双重重型tetraquark中的两个重夸克受其色彩 - 库仑电势绑定到紧凑的diquark中。双重厚重的had子与QCD的近似QCD对称性相关，与重型的had子通过用重型的反quark替换为重的diquark获得的重物。有效的野外理论可用于扩大重量夸克质量的逆权力中的单一重型黑龙和双重厚重的黑龙。可以使用重型夸克 - 夸克 - - 夸克对称性对称性，可以从重型媒介，重型桶和双重重的重气底的膨胀系数中确定膨胀的系数。我们可以预测，地面偶有的重型四夸克人的质量，使用误差棒，使用AS输入在实验中测得的重介子和重型重质体的质量，以及使用晶格QCD计算的双重重型baryons的质量。预计唯一的双重笨重的四夸克人对强衰变是稳定的，是$ bb $ tetraquarks，带有轻巧的风味$ \ bar u \ bar u \ bar d $，$ \ bar s \ bar s \ bar u $和$ \ bar s \ bar s \ bar d $。
In the heavy-quark limit, the two heavy quarks in a doubly heavy baryon or a doubly heavy tetraquark are bound by their color-Coulomb potential into a compact diquark. The doubly heavy hadrons are related by the approximate heavy-quark--diquark symmetry of QCD to the heavy hadrons obtained by replacing the heavy diquark by a heavy antiquark. Effective field theories can be used to expand the masses of singly heavy hadrons and doubly heavy hadrons in inverse powers of the heavy quark masses. The coefficients in the expansions for doubly heavy tetraquarks can be determined from those for heavy mesons, heavy baryons, and doubly heavy baryons using heavy-quark--diquark symmetry. We predict the masses of the ground-state doubly heavy tetraquarks with error bars using as inputs the masses of heavy mesons and heavy baryons measured in experiments and the masses of doubly heavy baryons calculated using lattice QCD. The only doubly heavy tetraquarks predicted to be stable with respect to strong decays are $bb$ tetraquarks with light flavor $\bar u \bar d$, $\bar s \bar u$ and $\bar s \bar d$.
