• [1]

    D. Müller, D. Robaschik, B. Geyer et al., Fortsch. Phys. 42, 101-141 (1994), arXiv:hep-ph/9812448[hep-ph

  • [2]

    X. D. Ji, Phys. Rev. Lett. 78, 610-613 (1997), arXiv:hep-ph/9603249[hep-ph

  • [3]

    A. V. Radyushkin, Phys. Lett. B 385, 333-342 (1996), arXiv:hep-ph/9605431[hep-ph

  • [4]

    X. D. Ji, Phys. Rev. D 55, 7114-7125 (1997), arXiv:hep-ph/9609381[hep-ph

  • [5]

    A. V. Radyushkin, Phys. Rev. D 56, 5524-5557 (1997), arXiv:hep-ph/9704207[hep-ph

  • [6]

    J. J. C. Collins, L. Frankfurt and M. Strikman, Phys. Rev. D 56, 2982-3006 (1997), arXiv:hep-ph/9611433[hep-ph

  • [7]

    K. Goeke, M. V. Polyakov, and M. Vanderhaeghen, Prog. Part. Nucl. Phys. 47, 401-515 (2001), arXiv:hep-ph/0106012[hep-ph

  • [8]

    M. Vanderhaeghen, P. A. M. Guichon, and M. Guidal, Phys. Rev. D 60, 094017 (1999), arXiv:hep-ph/9905372[hep-ph

  • [9]

    G. Duplančić, D. Müller and K. Passek-Kumerički, Phys. Lett. B 771, 603-610 (2017), arXiv:1612.01937[hep-ph

  • [10]

    M. Constantinou, A. Courtoy, M. A. Ebert et al., Prog. Part. Nucl. Phys. 121, 103908 (2021), arXiv:2006.08636[hep-ph

  • [11]

    M. Diehl, Phys. Rept. 388, 41-277 (2003), arXiv:hep-ph/0307382[hep-ph

  • [12]

    A. V. Belitsky and A. V. Radyushkin, Phys. Rept. 418, 1-387 (2005), arXiv:hep-ph/0504030[hep-ph

  • [13]

    I. Bedlinskiy et al. (CLAS Collaboration), Phys. Rev. C 90(2), 025205 (2014), arXiv:1405.0988[nucl-ex

  • [14]

    M. G. Alexeev et al. (COMPASS Collaboration), Phys. Lett. B 805, 135454 (2020), arXiv:1903.12030[hep-ex

  • [15]

    A. Accardi, J. L. Albacete, M. Anselmino et al. Eur. Phys. J. A 52(9), 268 (2016) arXiv: 1212.1701 [nucl-ex]

  • [16]

    R. Abdul Khalek, A. Accardi, J. Adam et al., Nucl. Phys. A 1026, 122447 (2022)

  • [17]

    D. P. Anderle, V. Bertone, X. Cao et al., Front. Phys. (Beijing) 16(6), 64701 (2021), arXiv:2102.09222[nucl-ex

  • [18]

    J. M. M. Chávez, V. Bertone, F. De Soto Borrero et al., Phys. Rev. Lett. 128(20), 202501 (2022), arXiv:2110.09462[hep-ph

  • [19]

    I. V. Musatov and A. V. Radyushkin, Phys. Rev. D 61, 074027 (2000), arXiv:hep-ph/9905376[hep-ph

  • [20]

    S. V. Goloskokov and P. Kroll, Eur. Phys. J. C 42, 281-301 (2005) arXiv: hep-ph/0501242

  • [21]

    S.V. Goloskokov and P. Kroll, Eur. Phys. J. C 50, 829-842 (2007)

  • [22]

    S. V. Goloskokov and P. Kroll, Eur. Phys. J. C 59, 809-819 (2009)

  • [23]

    S. V. Goloskokov and P. Kroll, Eur. Phys. J. C 65, 137-151 (2010), arXiv:0906.0460[hep-ph

  • [24]

    S. V. Goloskokov and P. Kroll, Eur. Phys. J. A 47, 112 (2011), arXiv:1106.4897[hep-ph

  • [25]

    J. Botts and G. F. Sterman, Nucl. Phys. B 325, 62-100 (1989)

  • [26]

    R. Jakob and P. Kroll, Phys. Lett. B 315, 463-470 (1993) [Erratum: Phys. Lett. B 319, 545 (1993)] arXiv: hep-ph/9306259 [hep-ph]

  • [27]

    J. Bolz, P. Kroll, and J. G. Korner, Z. Phys. A 350, 145-159 (1994) arXiv: hep-ph/9403319 [hep-ph]

  • [28]

    J. Pumplin, D. R. Stump, J. Huston et al., JHEP 07, 012 (2002), arXiv:hep-ph/0201195[hep-ph

  • [29]

    M. Diehl, T. Feldmann, R. Jakob et al., Eur. Phys. J. C 39, 1-39 (2005), arXiv:hep-ph/0408173[hep-ph

  • [30]

    M. Anselmino, M. Boglione, U. D'Alesio et al., Nucl. Phys. B Proc. Suppl. 191, 98-107 (2009), arXiv:0812.4366[hep-ph

  • [31]

    M. Göckeler et al. (QCDSF and UKQCD), Phys. Rev. Lett. 98, 222001 (2007), arXiv:hep-lat/0612032[hep-lat

  • [32]

    B. Berthou, D. Binosi, N. Chouika et al., Eur. Phys. J. C 78(6), 478 (2018), arXiv:1512.06174[hep-ph

  • [33]

    M. Defurne et al. (Jefferson Lab Hall A), Phys. Rev. Lett. 117(26), 262001 (2016), arXiv:1608.01003[hep-ex

  • [34]

    P. Kroll, private communication, (2019)