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

@article{Lucha2017TetraquarkAT,
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},
year={2017},
volume={77},
pages={1-11}
}
• Published in
The European physical journal…
2017
• 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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