SU(3)-symmetry breaking effects and mass splitting in scalar and pseudoscalar $D^{+}$ mesons from QCD sum rules

H. Y. Jin, J. Zhang, Z. F. Zhang +1

Motivated by the similar mass splitting in light-light and heavy-light meson system in $J^P=0^{-}$ and $J^P=0^{+}$ channel, taking into account the operator mixing to obtain an…