f_K/f_pi ratio from QCD sum rules

Details f_K/f_pi ratio from QCD sum rules f_K/f_pi ratio from QCD sum rules

1997-08-25

arxiv.org/abs/nucl-th/9708042v3

J.KoreanPhys.Soc.32:798,1998; Erratum-ibid.33:551,1998

Physics

Nuclear Physics

Nuclear Theory

revtex, 17 pages; erratum (with a more detailed analysis) added. results are slightly changed

Scientific paper

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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