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Systematical investigation on the stability of doubly heavy tetraquark states

  • Chengrong DengEmail author
  • Hong Chen
  • Jialun Ping
Regular Article - Theoretical Physics
  • 27 Downloads

Abstract

We systematically investigate the stability of the doubly heavy tetraquark states \([Q_1Q_2][\bar{q}_3\bar{q}_4]\) (\(Q=c\) and b, \(q=u\), d and s) within the framework of the alternative color flux-tube model involving a multi-body confinement potential, \(\sigma \)-exchange, one-gluon exchange and one-Goldstone-boson-exchange interactions. Our numerical analysis indicates that the states \([bb][\bar{u}\bar{d}]\) with \(01^+\) and \([bb][\bar{u}\bar{s}]\) with \(1^+\) are the most promising stable states against the strong interaction. The states \([cc][\bar{u}\bar{d}]\) with \(01^+\), \([bc][\bar{u}\bar{d}]\) with \(00^+\) and \(01^+\), and \([bb][\bar{u}\bar{d}]\) with \(01^-\) as stable states are also predicted in the model. The dynamical mechanism producing those stable states with tetrahedral structure are discussed in the model. The states \([bb][\bar{u}\bar{d}]\) and \([bc][\bar{u}\bar{d}]\) with \(IJ^P=12^+\) would not be stable although they are, respectively, below the \(\bar{B}^*\bar{B}^*\) and \(D^*\bar{B}^*\) thresholds because they can decay into D-wave \(\bar{B}\bar{B}\) and \(D\bar{B}\) through the strong interaction. The states should have narrow widths if they really exist as our model prediction.

Notes

Acknowledgements

This research is partly supported by the National Science Foundation of China under Contracts nos. 11875226 and 11775118, the Chongqing Natural Science Foundation under Project no. cstc2019jcyj-msxmX0409 and Fundamental Research Funds for the Central Universities under Contracts no. SWU118111.

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© Società Italiana di Fisica (SIF) and Springer-Verlag GmbH Germany, part of Springer Nature 2020

Authors and Affiliations

  1. 1.School of Physical Science and TechnologySouthwest UniversityChongqingChina
  2. 2.School of Physical Science and TechnologyNanjing Normal UniversityNanjingChina

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