• [1]

    T. Barnes and E. S. Swanson, Phys. Rev. D, 46: 131 (1992)

  • [2]

    E. S. Swanson, Ann. Phys. (N.Y.), 220: 73 (1992)

  • [3]

    T. Barnes, E. S. Swanson, and J. Weinstein, Phys. Rev. D, 46: 4868 (1992)

  • [4]

    T. Barnes, N. Black, and E. S. Swanson, Phys. Rev. C, 63: 025204 (2001)

  • [5]

    G. Colangelo, J. Gasser, and H. Leutwyler, Nucl. Phys. B, 603: 125 (2001)

  • [6]

    A. Dobado, M. J. Herrero, and T. N. Truong, Phys. Lett. B, 235: 134 (1990)

  • [7]

    A. Dobado and J. R. Peláez, Phys. Rev. D, 56: 3057 (1997)

  • [8]

    F. Guerrero and J. A. Oller, Nucl. Phys. B, 537: 459 (1999)

  • [9]

    A. G. Nicola and J. Peláez, Phys. Rev. D, 65: 054009 (2002)

  • [10]

    J. Nebreda and J. R. Peláez, Phys. Rev. D, 81: 054035 (2010)

  • [11]

    M. Döring and U.-G. Meißner, JHEP, 01: 009 (2012)

  • [12]

    F.-K. Guo, R.-G. Ping, P.-N. Shen, H.-C. Chiang, and B. S. Zou, Nucl. Phys. A, 773: 78 (2006)

  • [13]

    I. V. Danilkin, L. I. R. Gil, and M. F. M. Lutz, Phys. Lett. B, 703: 504 (2011)

  • [14]

    Y.-Q. Li and X.-M. Xu, Nucl. Phys. A, 794: 210 (2007)

  • [15]

    Z.-Y. Shen and X.-M. Xu, J. Korean Phys. Soc., 66: 754 (2015)

  • [16]

    Z.-Y. Shen, X.-M. Xu, and H. J. Weber, Phys. Rev. D, 94: 034030 (2016)

  • [17]

    D. Lohse, J. W. Durso, K. Holinde, and J. Speth, Nucl. Phys. A, 516: 513 (1990)

  • [18]

    G. E. Brown, C. M. Ko, Z. G. Wu, and L. H. Xia, Phys. Rev. C, 43: 1881 (1991)

  • [19]

    K. Yang, X.-M. Xu, and H. J. Weber, Phys. Rev. D, 96: 114025 (2017)

  • [20]

    K. Nakamura et al (Particle Data Group), J. Phys. G, 37: 075021 (2010)

  • [21]

    S.-T. Ji, Z.-Y. Shen, and X.-M. Xu, J. Phys. G, 42: 095110 (2015)

  • [22]

    W. Buchmüller and S.-H. H. Tye, Phys. Rev. D, 24: 132 (1981)

  • [23]

    F. Karsch, E. Laermann, and A. Peikert, Nucl. Phys. B, 605: 579 (2001)

  • [24]

    X.-M. Xu, Nucl. Phys. A, 697: 825 (2002)

  • [25]

    S. Godfrey and N. Isgur, Phys. Rev. D, 32: 189 (1985)

  • [26]

    G. B. Arfken and H. J. Weber, Mathematical Methods for Physicists (Elsevier, Amsterdam, 2006)