夸克-强子二元性：捏核方法
Quark-hadron duality: pinched kernel approch
摘要：
利用ALEPH合作组在矢量通道和轴矢量通道上测量的强子谱函数研究了夸克-强子对偶性破坏（DV）。这完全是在捏核有限能量和规则（FESR）的框架内完成的，即以模型独立的方式。通过使用适当的核，并假设在此区域谱函数由微扰QCD给出，ALEPH数据的运动学范围有效地扩展到$s = 10\; {\mbox{GeV}^2}$。通过使用矢量通道中的$e^+ e^-$湮灭数据来获得对该假设的支持。结果表明，在这两个渠道的捏FESR的良好的饱和，而不需要进一步明确的DV模型。
英文摘要：
Hadronic spectral functions measured by the ALEPH collaboration in the vector and axial-vector channels are used to study potential quark-hadron duality violations (DV). This is done entirely in the framework of pinched kernel finite energy sum rules (FESR), i.e. in a model independent fashion. The kinematical range of the ALEPH data is effectively extended up to $s = 10\; {\mbox{GeV}^2}$ by using an appropriate kernel, and assuming that in this region the spectral functions are given by perturbative QCD. Support for this assumption is obtained by using $e^+ e^-$ annihilation data in the vector channel. Results in both channels show a good saturation of the pinched FESR, without further need of explicit models of DV.
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