Analysis of the Vector and Axialvector $QQ\bar {Q}\bar {Q}$ Tetraquark States with QCD Sum Rules

Zhi-Gang Wang (Department of Physics, North China Electric Power University, Baoding 071003, P.R. China) ; Zun-Yan Di (Department of Physics, North China Electric Power University, Baoding 071003, P.R. China)

05 July 2019

Abstract: In this article, we construct the axialvector-diquark--axialvector-antidi-quark type currents to study both the vector and axialvector $QQ\bar{Q}\bar{Q}$ tetra-quark states with the QCD sum rules, and obtain the masses $M_{Y(cc\bar{c}\bar{c},1^{+-})} =6.05\pm0.08\,\rm{GeV}$, $M_{Y(cc\bar{c}\bar{c},1^{--})} =6.11\pm0.08\,\rm{GeV}$, $M_{Y(bb\bar{b}\bar{b},1^{+-})} =18.84\pm0.09\,\rm{GeV}$, $M_{Y(bb\bar{b}\bar{b},1^{--})} =18.89\pm0.09\,\rm{GeV}$. The vector tetraquark states lie $40\,\rm{MeV}$ above the corresponding centroids of the $0^{++}$, $1^{+-}$ and $2^{++}$ tetraquark states, which is a typical feature of the vector tetraquark states consisting of four heavy quarks.


Published in: Acta Physica Polonica B 50 (2019) 1335-1348 DOI: 10.5506/APhysPolB.50.1335
License: CC-BY-4.0



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