• [1]

    N. Brambilla, S. Eidelman, C. Hanhart et al., The XY Z states: experimental and theoretical status and perspectives, arXiv: 1907.07583 [hep-ex]

  • [2]

    S. L. Olsen, Prog. Theor. Phys. Suppl., 193: 38 (2012)

  • [3]

    H. X. Chen, W. Chen, X. Liu et al., Phys. Rept., 639: 1 (2016)

  • [4]

    E. Oset et al., Int. J. Mod. Phys. E, 25: 1630001 (2016)

  • [5]

    R. F. Lebed, R. E. Mitchell, and E. S. Swanson, Prog. Part. Nucl. Phys., 93: 143-194 (2017)

  • [6]

    S. L. Olsen, T. Skwarnicki, and D. Zieminska, Rev. Mod. Phys., 90: 015003 (2018)

  • [7]

    F. K. Guo, C. Hanhart, U. G. Meißner et al., Rev. Mod. Phys., 90: 015004 (2018)

  • [8]

    S. K. Choi et al. (Belle Collaboration), Phys. Rev. Lett., 100: 142001 (2008)

  • [9]

    K. Chilikin et al. (Belle Collaboration), Phys. Rev. D, 88: 074026 (2013)

  • [10]

    R. Aaij et al. (LHCb Collaboration), Phys. Rev. Lett., 112: 222002 (2014)

  • [11]

    M. Ablikim et al. (BESⅢ Collaboration), Phys. Rev. Lett., 110: 252001 (2013)

  • [12]

    Z. Q. Liu et al. (Belle Collaboration), Phys. Rev. Lett., 110: 252002 (2013), Erratum: [Phys. Rev. Lett., 111: 019901 (2013)]

  • [13]

    F. Aceti, M. Bayar, J. M. Dias et al., Eur. Phys. J. A, 50: 103 (2014)

  • [14]

    C. F. Qiao and L. Tang, Eur. Phys. J. C, 74: 2810 (2014)

  • [15]

    Z. Wang, Eur. Phys. J. C, 74: 2963 (2014)

  • [16]

    K. P. Khemchandani, A. Martinez Torres, M. Nielsen et al., Phys. Rev. D, 89: 014029 (2014)

  • [17]

    C. Deng, J. Ping, and F. Wang, Phys. Rev. D, 90: 054009 (2014)

  • [18]

    E. Oset, H. Chen, A. Feijoo et al., Nucl. Phys. A, 954: 371-392 (2016)

  • [19]

    J. Lu, E. Wang, J. Xie et al., Phys. Rev. D, 93: 094009 (2016)

  • [20]

    E. Wang, H. Chen, L. Geng et al., Phys. Rev. D, 93: 094001 (2016)

  • [21]

    H. Chen, L. Geng, W. Liang et al., Phys. Rev. C, 93: 065203 (2016)

  • [22]

    R. Aaij et al. (LHCb Collaboration), Phys. Rev. D, 95: 012002 (2017)

  • [23]

    E. Wang, J. J. Xie, L. S. Geng et al., Phys. Rev. D, 97: 014017 (2018)

  • [24]

    R. Molina and E. Oset, Phys. Rev. D, 80: 114013 (2009)

  • [25]

    L. R. Dai, G. Y. Wang, X. Chen et al., Eur. Phys. J. A, 55: 36 (2019)

  • [26]

    K. Abe et al. (Belle Collaboration), Phys. Rev. Lett., 87: 161601 (2001)

  • [27]

    M. Tanabashi et al. (Particle Data Group), Phys. Rev. D, 98: 030001 (2018)

  • [28]

    S. Choi et al. (Belle Collaboration), Phys. Rev. Lett., 91: 262001 (2003)

  • [29]

    S. K. Choi et al. (Belle Collaboration), Phys. Rev. D, 84: 052004 (2011)

  • [30]

    B. Aubert et al. (BaBar Collaboration), Phys. Rev. D, 77: 111101 (2008)

  • [31]

    A. Abulencia et al. (CDF Collaboration), Phys. Rev. Lett., 96: 102002 (2006)

  • [32]

    R. Aaij et al. (LHCb Collaboration), Phys. Rev. Lett., 110: 222001 (2013)

  • [33]

    R. Aaij et al. (LHCb Collaboration), Phys. Rev. D, 92: 011102 (2015)

  • [34]

    S. Sakai, E. Oset, and A. Ramos, Eur. Phys. J. A, 54: 10 (2018)

  • [35]

    L. S. Geng, E. Oset, L. Roca et al., Phys. Rev. D, 75: 014017 (2007)

  • [36]

    G. Y. Wang, L. Roca, and E. Oset, Phys. Rev. D, 100: 074018 (2019)

  • [37]

    G. Y. Wang, L. Roca, E. Wang et al., Eur. Phys. J. C, 80: 388 (2020)