Mission Target: Tetraquark Mesons of Flavour-Cryptoexotic Type

Abstract

Currently, flavour-cryptoexotic tetraquarks form the most common sort of all experimentally established exotic multiquark hadrons. This note points out a few promising concepts that should help improve theoretical (but, for several reasons, not quite straightforward) analyses of such kind of states: among others, their scope of application encompasses the strong interactions in the limit of (arbitrarily) large numbers of colours, and equally analytical and nonperturbative approaches to multiquark states.

12 pages, 2 figures

References in corpus (9)

• Narrow exotic tetraquark mesons in large-$N_c$ QCD
• Tetraquarks in large-$N_c$ QCD
• Tetraquark-adequate formulation of QCD sum rules
• Tetraquark and two-meson states at large $N_{\mathrm{c}}$
• Tetraquark-adequate QCD sum rules for quark-exchange processes
• Mass of $1^{-+}$ four-quark--hybrid mixed states
• Do near-threshold molecular states mix with neighbouring $\bar{Q}Q$ states?
• Axial-vector and pseudoscalar tetraquarks $[ud][\bar{c}\bar{s}]$
• Mission Target: Exotic Multiquark Hadrons -- Sharpened Blades