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- W1515703802 abstract "We prove the validity of Schwinger's quartic nonet mass formula for a general nonet structure with the isoscalar singlet mass being shifted from its ``ideal'' value. We apply this formula to the problem of the correct qbar{q} assignment for the scalar meson nonet. The results favor scalar isoscalar singlet and isoscalar octet masses in the vicinity of 1 GeV and 1.45 GeV, respectively. We explain the failure of Schwinger's formula for the pseudoscalar meson nonet, and suggest a new version of this formula, modified by the inclusion of the pseudoscalar decay constants, which holds with improved accuracy for this nonet. We also rederive the new Gell-Mann-Okubo mass formula 3M^2(nbar{n},I=1)+2M^2(sbar{s})=4M^2(sbar{n})+M^2(nbar{n},I=0) (n=u,d), suggested in our previous publications." @default.
- W1515703802 created "2016-06-24" @default.
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- W1515703802 date "1997-09-26" @default.
- W1515703802 modified "2023-09-27" @default.
- W1515703802 title "Schwinger's nonet mass formula revisited" @default.
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