标题： 奇异夸克质量从Cabibbo抑制的tau衰变的不变质量分布中获得 显示英文标题

标题： Strange Quark Mass from the Invariant Mass Distribution of Cabibbo-Suppressed Tau Decays

摘要： 夸克质量修正对τ轻子强子宽度的影响仅在奇异夸克的情况下起重要作用，因此提供了一种确定其质量的方法。 实验输入是从ALEPH对τ衰变为奇异强子末态的完整研究中得到的矢量加轴矢量奇异谱函数。 其他实验关于奇异衰变模式的新结果也已被纳入。 目前的分析利用谱函数的矩，在Mtau质量尺度上确定奇异夸克质量。 对非微扰成分应用了合理的理论约束，并仔细处理了表现出收敛问题的矩的微扰展开。 所得结果为m_s(Mtau^2) = (120 +- 11_exp +- 8_Vus +- 19_th) MeV = (120^+21_-26) MeV，在从Mtau到约1.4 GeV的尺度范围内是稳定的。 将此结果演化到常用的尺度得到m_s(1 GeV^2) = (160^+28_-35) MeV和m_s(4 GeV^2) = (116^+20_-25) MeV。 显示英文摘要

摘要： Quark mass corrections to the tau hadronic width play a significant role only for the strange quark, hence providing a method for determining its mass. The experimental input is the vector plus axial-vector strange spectral function derived from a complete study of tau decays into strange hadronic final states performed by ALEPH. New results on strange decay modes from other experiments are also incorporated. The present analysis determines the strange quark mass at the Mtau mass scale using moments of the spectral function. Justified theoretical constraints are applied to the nonperturbative components and careful attention is paid to the treatment of the perturbative expansions of the moments which exhibit convergence problems. The result obtained, m_s(Mtau^2) = (120 +- 11_exp +- 8_Vus +- 19_th) MeV = (120^+21_-26) MeV, is stable over the scale from Mtau down to about 1.4 GeV. Evolving this result to customary scales yields m_s(1 GeV^2) = (160^+28_-35) MeV and m_s(4 GeV^2) = (116^+20_-25) MeV.