• [1]

    M. Wirbel, B. Stech, and M. Bauer, Z. Phys. C, 29: 637 (1985)

  • [2]

    D. Daniel, R. Gupta, and D. G. Richards, Phys. Rev. D, 43: 3715 (1991)

  • [3]

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

  • [4]

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

  • [5]

    ,M. V. Terentev, Sov. J. Nucl. Phys., 24: 106 (1976) [Yad. Fiz. 24 (1976) 207]

  • [6]

    ,V. B. Berestetsky and M. V. Terentev, Sov. J. Nucl. Phys., 25: 347 (1977) [Yad. Fiz. 25 (1977) 653]

  • [7]

    H. Y. Cheng, C. Y. Cheung, C. W. Hwang et al., Phys. Rev. D, 57: 5598 (1998)

  • [8]

    J. Carbonell, B. Desplanques, V. A. Karmanov et al., Phys. Rept., 300: 215 (1998)

  • [9]

    W. Jaus, Phys. Rev. D, 60: 054026 (1999)

  • [10]

    P. A. M. Dirac, Rev. Mod. Phys., 21: 392 (1949)

  • [11]

    S. J. Brodsky, H. C. Pauli, and S. S. Pinsky, Phys. Rept., 301: 299 (1998)

  • [12]

    W. Jaus, Phys. Rev. D, 41: 3394 (1990)

  • [13]

    W. Jaus and D. Wyler, Phys. Rev. D, 41: 3405 (1990)

  • [14]

    C. Q. Geng, C. C. Lih, and C. Xia, Eur. Phys. J. C, 76(6): 313 (2016)

  • [15]

    W. Jaus, Phys. Rev. D, 44: 2851 (1991)

  • [16]

    W. Jaus, Phys. Rev. D, 53: 1349 (1996)

  • [17]

    H. Y. Cheng, C. Y. Cheung, and C. W. Hwang, Phys. Rev. D, 55: 1559 (1997)

  • [18]

    P. J. O’Donnell and G. Turan, Phys. Rev. D, 56: 295 (1997)

  • [19]

    C. Y. Cheung, C. W. Hwang, and W. M. Zhang, Z. Phys. C, 75: 657 (1997)

  • [20]

    H. M. Choi and C. R. Ji, Nucl. Phys. A, 618: 291 (1997)

  • [21]

    H. M. Choi and C. R. Ji, Phys. Rev. D, 59: 074015 (1999)

  • [22]

    H. M. Choi and C. R. Ji, Phys. Rev. D, 59: 034001 (1998)

  • [23]

    C. R. Ji and H. M. Choi, Phys. Lett. B, 513: 330 (2001)

  • [24]

    M. A. DeWitt, H. M. Choi, and C. R. Ji, Phys. Rev. D, 68: 054026 (2003)

  • [25]

    H. M. Choi and C. R. Ji, Phys. Rev. D, 75: 034019 (2007)

  • [26]

    H. M. Choi, Phys. Rev. D, 75: 073016 (2007)

  • [27]

    N. Barik, S. K. Tripathy, S. Kar et al., Phys. Rev. D, 56: 4238 (1997)

  • [28]

    C. W. Hwang, Eur. Phys. J. C, 19: 105 (2001)

  • [29]

    C. W. Hwang, Phys. Rev. D, 81: 114024 (2010)

  • [30]

    C. W. Hwang, Phys. Lett. B, 516: 65 (2001)

  • [31]

    C. W. Hwang, JHEP, 0910: 074 (2009)

  • [32]

    Q. Chang, S. J. Brodsky, and X. Q. Li, Phys. Rev. D, 95(9): 094025 (2017)

  • [33]

    Q. Chang, S. Xu, and L. Chen, Nucl. Phys. B, 921: 454 (2017)

  • [34]

    Q. Chang, X. N. Li, X. Q. Li et al., Chin. Phys. C, 42(7): 073102 (2018)

  • [35]

    Q. Chang, L. L. Chen, and S. Xu, J. Phys. G, 45(7): 075005 (2018)

  • [36]

    B. L. G. Bakker, H. M. Choi, and C. R. Ji, Phys. Rev. D, 63: 074014 (2001)

  • [37]

    B. L. G. Bakker, H. M. Choi, and C. R. Ji, Phys. Rev. D, 65: 116001 (2002)

  • [38]

    B. L. G. Bakker, H. M. Choi, and C. R. Ji, Phys. Rev. D, 67: 113007 (2003)

  • [39]

    H. M. Choi and C. R. Ji, Phys. Rev. D, 70: 053015 (2004)

  • [40]

    H. M. Choi and C. R. Ji, Phys. Rev. D, 80: 114003 (2009)

  • [41]

    H. M. Choi, Phys. Rev. D, 81: 054003 (2010)

  • [42]

    H. M. Choi, J. Phys. G, 37: 085005 (2010)

  • [43]

    H. M. Choi and C. R. Ji, Phys. Lett. B, 696: 518 (2011)

  • [44]

    H. M. Choi and C. R. Ji, Nucl. Phys. A, 856: 95 (2011)

  • [45]

    H. M. Choi and C. R. Ji, Phys. Rev. D, 91(1): 014018 (2015)

  • [46]

    H. M. Choi and C. R. Ji, Phys. Rev. D, 95(5): 056002 (2017)

  • [47]

    H. M. Choi, H. Y. Ryu, and C. R. Ji, Phys. Rev. D, 96(5): 056008 (2017)

  • [48]

    H. Y. Ryu, H. M. Choi, and C. R. Ji, Phys. Rev. D, 98(3): 034018 (2018)

  • [49]

    C. W. Hwang, Phys. Rev. D, 64: 034011 (2001)

  • [50]

    C. W. Hwang, Phys. Lett. B, 530: 93 (2002)

  • [51]

    C. W. Hwang and R. S. Guo, Phys. Rev. D, 82: 034021 (2010)

  • [52]

    C. Y. Cheung and C. W. Hwang, JHEP, 1404: 177 (2014)

  • [53]

    W. Wang and Y. L. Shen, Phys. Rev. D, 78: 054002 (2008)

  • [54]

    W. Wang, Y. L. Shen, and C. D. Lu, Phys. Rev. D, 79: 054012 (2009)

  • [55]

    Y. L. Shen and Y. M. Wang, Phys. Rev. D, 78: 074012 (2008)

  • [56]

    X. X. Wang, W. Wang, and C. D. Lu, Phys. Rev. D, 79: 114018 (2009)

  • [57]

    H. Y. Cheng and X. W. Kang, Eur. Phys. J. C, 77(9): 587 (2017), Erratum: Eur. Phys. J. C, 77(12): 863 (2017)

  • [58]

    X. W. Kang, T. Luo, Y. Zhang et al., arXiv: 1808.02432 [hep-ph]

  • [59]

    W. Jaus, Phys. Rev. D, 67: 094010 (2003)

  • [60]

    H. Y. Cheng, C. K. Chua, and C. W. Hwang, Phys. Rev. D, 69: 074025 (2004)

  • [61]

    R. C. Verma, J. Phys. G, 39: 025005 (2012)

  • [62]

    Y. J. Shi, W. Wang, and Z. X. Zhao, Eur. Phys. J. C, 76(10): 555 (2016)

  • [63]

    W. Wang and R. Zhu, arXiv: 1808.10830 [hep-ph]

  • [64]

    H. Y. Cheng, C. K. Chua, and C. W. Hwang, Phys. Rev. D, 70: 034007 (2004)

  • [65]

    H. Y. Cheng and C. K. Chua, JHEP, 0411: 072 (2004)

  • [66]

    Z. T. Wei, H. W. Ke, and X. Q. Li, Phys. Rev. D, 80: 094016 (2009)

  • [67]

    W. Wang, F. S. Yu, and Z. X. Zhao, Eur. Phys. J. C, 77(11): 781 (2017)

  • [68]

    H. W. Ke, N. Hao, and X. Q. Li, arXiv: 1711.02518 [hep-ph]

  • [69]

    Z. X. Zhao, Chin. Phys. C, 42(9): 093101 (2018)

  • [70]

    Z. X. Zhao, Eur. Phys. J. C, 78(9): 756 (2018)

  • [71]

    C. K. Chua, Phys. Rev. D, 99(1): 014023 (2019)

  • [72]

    X. H. Hu, R. H. Li, and Z. P. Xing, arXiv: 2001.06375 [hep-ph]

  • [73]

    H. M. Choi, H. Y. Ryu, and C. R. Ji, Phys. Rev. D, 99(7): 076012 (2019)

  • [74]

    N. Dhiman, H. Dahiya, C. R. Ji et al., Phys. Rev. D, 100(1): 014026 (2019)

  • [75]

    N. Kumar, Phys. Rev. D, 99(1): 014039 (2019)

  • [76]

    H. W. Ke, N. Hao, and X. Q. Li, Eur. Phys. J. C, 79(6): 540 (2019)

  • [77]

    H. W. Ke, F. Lu, X. H. Liu et al., arXiv: 1912.01435 [hep-ph]

  • [78]

    H. W. Ke, F. Lu, X. H. Liu et al., Eur. Phys. J. C, 80(2): 140 (2020)

  • [79]

    C. Q. Geng, C. W. Hwang, C. C. Lih et al., Phys. Rev. D, 64: 114024 (2001)

  • [80]

    H. Y. Cheng and C. K. Chua, Phys. Rev. D, 69: 094007 (2004)

  • [81]

    H. Y. Cheng and C. K. Chua, Erratum: Phys. Rev. D, 81: 059901 (2010)

  • [82]

    H. Y. Cheng and C. K. Chua, Phys. Rev. D, 81: 114006 (2010), Erratum: Phys. Rev. D, 82: 059904 (2010)

  • [83]

    Y. L. Shen and G. Li, Eur. Phys. J. C, 73: 2441 (2013)

  • [84]

    H. M. Choi and C. R. Ji, Phys. Rev. D, 89(3): 033011 (2014)

  • [85]

    Q. Chang, X. N. Li, X. Q. Li et al., Phys. Rev. D, 98(11): 114018 (2018)

  • [86]

    Q. Chang, X. N. Li, and L. T. Wang, Eur. Phys. J. C, 79(5): 422 (2019)

  • [87]

    Q. Chang, L. T. Wang, and X. N. Li, JHEP, 1912: 102 (2019)

  • [88]

    P. Ball and V. M. Braun, Phys. Rev. D, 58: 094016 (1998)

  • [89]

    H. M. Choi, C. R. Ji, Z. Li et al., Phys. Rev. C, 92(5): 055203 (2015)

  • [90]

    H. M. Choi and C. R. Ji, Phys. Rev. D, 80: 054016 (2009)