Tetraquark properties are examined in the limit of large
${N_{\mathrm{c}}^{}}$ of color in QCD. The qualitative differences between molecular and compact tetraquarks are outlined. Consequences of the possible existence of compact tetraquarks are analyzed and shown to lead to upper bounds in the $N_{\mathrm{c}}^{}$-behavior of their decay widths. Open questions on theoretical grounds, related to the dynamics of systems composed of two quarks and two antiquarks, are addressed.
Large-${N_{\mathrm{c}}^{}}$ QCD and tetraquarks
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Pre-published on:
September 12, 2019
Published on:
September 26, 2019
Abstract
DOI: https://doi.org/10.22323/1.336.0028
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.