f_K/f_pi ratio from QCD sum rules
classification
⚛️ nucl-th
hep-ph
keywords
ratioaxialbreaking-parametercalculationcalculationsconstantscorrelationdecay
read the original abstract
Using the correlation function of the axial vector mesons, we present a QCD sum rule calculation for the decay constants f_pi and f_K. Our calculations are only weakly dependent on the SU(3) breaking-parameter for the QCD vacuum and give the ratio f_K/f_pi = 1.11 $\pm$ 0.02.
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