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

• Main Authors: Si-Qiang Luo, Kan Chen, Xiang Liu, Yan-Rui Liu, Shi-Lin Zhu
• Format: Article
• Language: English
• Published: SpringerOpen 2017-10-01
• Series: European Physical Journal C: Particles and Fields
• Online Access: http://link.springer.com/article/10.1140/epjc/s10052-017-5297-4
• ISSN: 1434-6044; 1434-6052

Abstract 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 with $$J=1$$ J=1 . Possible decay patterns of the tetraquarks are briefly discussed.