Chiral SU(4) x SU(4) breaking : masses and decay constants of charmed hadrons

The (4,4sup(]) + (4sup(],4) model of broken chiral SU(4) x SU(4) symmetry has been used to calculate the third-order coupling constants involving charmed and ordinary pseudoscalar mesons. The coupling constants are exploited to derive some interesting new relations among the masses and decay constants of these charmed particles. Using the known masses and decay constants as inputs, we exploit these relations to predict : Fsub(D)=-1.41Fsub(π), Fsub(F)=-1.13Fsub(π), Fsub(D)/Fsub(F)=1.25, m(Dsub(s))=1.43 GeV, m(Fsub(s))=1.39 GeV and m(Ksub(s))=1.02 GeV. (author)