标题： QCD类理论中动态上夸克质量的产生 显示英文标题

标题： Dynamical Up-quark Mass Generation in QCD-like theories

摘要： 我们计算了一些类似于QCD的理论中的动态生成的上夸克质量，这些理论是从超对称QCD通过异常介导的超对称破缺扰动得到的，并且具有$F=3$轻子味。 我们将低能有效理论与QCD的传统手征拉格朗日匹配，并在手征微扰理论中确定到次领头阶的系数，同时改变颜色的数量$N$。 我们发现，在大$N$极限下动态生成的上夸克质量消失，并且对于$F<N$来说是小的，然而对于$F=N$存在一个显著的$O(1)$贡献。 尽管我们的结果仅对小的超对称破缺是可靠的，但我们观察到，将$F=N$的结果外推到大的超对称破缺会导致一个足够大的动态上夸克质量，足以解释其整个物理质量。 显示英文摘要

摘要： We calculate the dynamically generated up quark mass in some QCD-like theories with $F=3$ light flavors, obtained from supersymmetric QCD perturbed via anomaly mediated supersymmetry breaking. We match the low-energy effective theory to the traditional chiral Lagrangian of QCD and determine the coefficients to next-to-leading order in chiral perturbation theory, while also varying the number of colors $N$. We find that the dynamically generated up quark mass vanishes in the large $N$ limit, and is small for $F<N$, however for $F=N$ there is a sizeable $O(1)$ contribution. While our results are reliable only for small supersymmetry breaking, we observe that extrapolating the $F=N$ result to large supersymmetry breaking would lead to a dynamical up quark mass that is large enough to account for its entire physical mass.