Exotic tetraquark states with the $$qq\bar{Q}\bar{Q}$$qqQ¯Q¯ configuration

@article{Luo2017ExoticTS,
  title={Exotic tetraquark states with the \$\$qq\bar\{Q\}\bar\{Q\}\$\$qqQ¯Q¯ configuration},
  author={Si-Qiang Luo and Kan Chen and Xiang Liu and Yan-Rui Liu and Shi-Lin Zhu},
  journal={The European Physical Journal C},
  year={2017},
  volume={77},
  pages={1-14}
}
In this work, we study systematically the mass splittings of the $$qq\bar{Q}\bar{Q}$$qqQ¯Q¯ ($$q=u$$q=u, d, s and $$Q=c$$Q=c, b) tetraquark states with the color-magnetic interaction by considering color mixing effects and estimate roughly their masses. We find that the color mixing effect is relatively important for the $$J^P=0^+$$JP=0+ states and possible stable tetraquarks exist in the $$nn\bar{Q}\bar{Q}$$nnQ¯Q¯ ($$n=u$$n=u, d) and $$ns\bar{Q}\bar{Q}$$nsQ¯Q¯ systems either with $$J=0$$J=0 or… 
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