A progress in the inverse matrix method in QCD sum rules
Zhen-Xing Zhao,
Yi-Peng Xing,
Run-Hui Li
Abstract:In traditional QCD sum rules, the simple hadron spectral density model of the “delta-function-type ground state + theta-function-type continuous spectrum” determines that there is no perfect parameter selection. In recent years, inverse problem methods, particularly the inverse matrix method, have shown better handling of QCD sum rules. This work continues to develop the inverse matrix method. Considering that the narrow-width approximation may still be a good approximation, we separate the ground state from t… Show more
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