Exotic Tetraquark Mesons in Large-$N_c$ Limit: an Unexpected Great Surprise

Abstract

Two-ordinary-meson scattering in large-$N_c$ QCD implies consistency criteria for intermediate-tetraquark contributions. Their fulfilment at $N_c$-leading order constrains the nature of the spectrum of genuinely exotic tetraquark states.

5 pages, 4 figures, contributed to "QCD@Work 2018 - International Workshop on Quantum Chromodynamics: Theory and Experiment" (25 - 28 June 2018, Matera, Italy)

References in corpus (4)

• Are There Tetraquarks at Large $N_c$ in QCD(F)?
• Narrow exotic tetraquark mesons in large-$N_c$ QCD
• Tetraquarks in the 1/N expansion and meson-meson resonances
• Tetraquark and two-meson states at large $N_{\mathrm{c}}$

Cited by in corpus (7)

• Mission Target: Exotic Multiquark Hadrons -- Sharpened Blades
• Cluster Reducibility of Multiquark Operators and Tetraquark-Adequate QCD Sum Rules
• Mission Target: Tetraquark Mesons of Flavour-Cryptoexotic Type
• Compact Flavour-Exotic Tetraquarks in Large-$N_{\mathrm{c}}$ QCD - To Be or Not to Be?
• Zooming in on Multiquark Hadrons within QCD Sum-Rule Approaches
• Multiquark-Oriented QCD Sum Rules
• Flavour-Exotic Tetraquarks in Large-$N_{\mathrm{c}}$ QCD: Do They Exist?