\begin{document}$cc\bar{c}\bar{c}$\end{document} tetraquark states with the QCD sum rules and obtain the masses and pole residues; then, we use the Regge trajectories to obtain the masses of the second radial excited states. The predicted masses support assigning the broad structure from 6.2 to 6.8 GeV in the di- \begin{document}$J/\psi$\end{document} mass spectrum to be the first radial excited state of the scalar, axialvector, vector, or tensor \begin{document}$cc\bar{c}\bar{c}$\end{document} tetraquark state, as well as assigning the narrow structure at about 6.9 GeV in the di- \begin{document}$J/\psi$\end{document} mass spectrum to be the second radial excited state of the scalar or axialvector \begin{document}$cc\bar{c}\bar{c}$\end{document} tetraquark state."> Tetraquark candidates in LHCb's di-<i>J</i>/<i>ψ</i> mass spectrum -
  • [1]

    R. J. Lloyd and J. P. Vary, Phys. Rev. D,70: 014009 (2004)

  • [2]

    N. Barnea, J. Vijande, and A. Valcarce, Phys. Rev. D,73: 054004 (2006)

  • [3]

    A. V. Berezhnoy, A. V. Luchinsky, and A. A. Novoselov, Phys. Rev. D,86: 034004 (2012)

  • [4]

    W. Heupel, G. Eichmann, and C. S. Fischer, Phys. Lett. B,718: 545 (2012)

  • [5]

    Y. Bai, S. Lu, and J. Osborne, arXiv: 1612.00012

  • [6]

    J. M. Richard, A. Valcarce, and J. Vijande, Phys. Rev. D,95: 054019 (2017)

  • [7]

    Z. G. Wang, Eur. Phys. J. C,77: 432 (2017)

  • [8]

    Z. G. Wang and Z. Y. Di, Acta Phys. Polon. B,50: 1335 (2019)

  • [9]

    M. Karliner, J. L. Rosner, and S. Nussinov, Phys. Rev. D,95: 034011 (2017)

  • [10]

    W. Chen, H. X. Chen, X. Liuet al., Phys. Lett. B,773: 247 (2017)

  • [11]

    M. N. Anwar, J. Ferretti, F. K. Guoet al., Eur. Phys. J. C,78: 647 (2018)

  • [12]

    A. Esposito and A. D. Polosa, Eur. Phys. J. C,78: 782 (2018)

  • [13]

    J. Wu, Y. R. Liu, K. Chenet al., Phys. Rev. D,97: 094015 (2018)

  • [14]

    C. Hughes, E. Eichten, and C. T. H. Davies, Phys. Rev. D,97: 054505 (2018)

  • [15]

    V. R. Debastiani and F. S. Navarra, Chin. Phys. C,43: 013105 (2019)

  • [16]

    M. S. Liu, Q. F. Lu, X. H. Zhonget al., Phys. Rev. D,100: 016006 (2019)

  • [17]

    X. Chen, arXiv: 2001.06755

  • [18]

    M. A. Bedolla, J. Ferretti, C. D. Robertset al., arXiv: 1911.00960

  • [19]

    C. Deng, H. Chen, and J. Ping, arXiv: 2003.05154

  • [20]

    P. Lundhammar and T. Ohlsson, arXiv: 2006.09393

  • [21]

    M. S. liu, F. X. Liu, X. H. Zhonget al., arXiv: 2006.11952

  • [22]

    Liupan An [On behalf of the LHCb Collaboration], Latest results on exotic hadrons at LHCb,https://indico.cern.ch/event/900972/

  • [23]

    R. Aaijet al., arXiv: 2006.16957

  • [24]

    M. A. Shifman, A. I. Vainshtein, and V. I. Zakharov, Nucl. Phys. B,147: 385 (1979)

  • [25]

    M. A. Shifman, A. I. Vainshtein, and V. I. Zakharov, Nucl. Phys. B,147: 448 (1979)

  • [26]

    L. J. Reinders, H. Rubinstein, and S. Yazaki, Phys. Rept.,127: 1 (1985)

  • [27]

    M. S. Maior de Sousa and R. Rodrigues da Silva, Braz. J. Phys.,46: 730 (2016)

  • [28]

    Z. G. Wang, Commun. Theor. Phys.,63: 325 (2015)

  • [29]

    Z. G. Wang, Chin. Phys. C,44: 063105 (2020)

  • [30]

    P. Colangelo and A. Khodjamirian, hep-ph/0010175

  • [31]

    M. Tanabashiet al., Phys. Rev. D,98: 030001 (2018)

Baidu
map