Tetraquark and two-meson states at large $$N_{\mathrm {c}}$$Nc

  title={Tetraquark and two-meson states at large \$\$N_\{\mathrm \{c\}\}\$\$Nc},
  author={Wolfgang Lucha and Dmitri Melikhov and Hagop Sazdjian},
  journal={The European Physical Journal C},
  • Wolfgang Lucha, Dmitri Melikhov, Hagop Sazdjian
  • Published in
    The European physical journal…
  • Medicine, Physics
  • The European Physical Journal C
  • Considering four-point correlation functions of color-singlet quark bilinears, we investigate, in the large-$$N_{\mathrm {c}}$$Nc limit of QCD, the subleading diagrams that involve, in the s-channel of meson–meson scattering amplitudes, two-quark–two-antiquark intermediate states. The latter contribute, together with gluon exchanges, to the formation, at the hadronic level, of two-meson and tetraquark intermediate states. It is shown that the two-meson contributions, which are predictable, in… CONTINUE READING

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