We discuss the necessary, albeit not sufficient, conditions for tetraquark poles to occur in the 1/N expansion of QCD and find the minimum order at which such poles may appear. Assuming tetraquark poles, we find a new nonplanar solution with the minimal number of topologies and tetraquark species. The solution implies narrow states. Mixing with quarkonium states is allowed so that P-wave tetraquarks with JPC=1 - would couple to e+e-.
Tetraquarks in the 1/N expansion: A new appraisal / Maiani, L.; Polosa, A. D.; Riquer, V.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 98:5(2018). [10.1103/PhysRevD.98.054023]
Tetraquarks in the 1/N expansion: A new appraisal
L. MaianiMembro del Collaboration Group
;A. D. PolosaMembro del Collaboration Group
;V. RiquerMembro del Collaboration Group
2018
Abstract
We discuss the necessary, albeit not sufficient, conditions for tetraquark poles to occur in the 1/N expansion of QCD and find the minimum order at which such poles may appear. Assuming tetraquark poles, we find a new nonplanar solution with the minimal number of topologies and tetraquark species. The solution implies narrow states. Mixing with quarkonium states is allowed so that P-wave tetraquarks with JPC=1 - would couple to e+e-.File allegati a questo prodotto
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