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arXiv · hep-ph/9409377

A Gauge Invariant Electromagnetic Two-Point Function For Heavy Light Quark Systems

L. Kisslinger·Zhenping Li
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Abstract

A gauge invariant electromagnetic two-point function, crucial to the investigations of the violation of isospin symmetry, is derived for heavy-light quark systems. Thus QED can be consistently introduced into the QCD Sum Rule method, which was not previously possible.

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L. Kisslinger, Zhenping Li. 1994-09-21. A Gauge Invariant Electromagnetic Two-Point Function For Heavy Light Quark Systems. https://doi.org/10.1103/physrevlett.74.2168

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