- 
								[1]
								
R. Pohl et al., Nature 466, 213 (2010)
 - 
								[2]
								
A. Antognini et al., Science 339, 417 (2013)
 - 
								[3]
								
C. E. Carlson, Prog. Part. Nucl. Phys. 82, 59 (2015)
 - 
								[4]
								
J. M. Alarcón, D. W. Higinbotham, and C. Weiss, Phys. Rev. C 102, 035203 (2020), arXiv: 2002.05167[hep-ph]
 - 
								[5]
								
Y.-H. Lin, H.-W. Hammer, and U.-G. Meißner, Phys. Lett. B 816, 136254 (2021), arXiv: 2102.11642[hep-ph]
 - 
								[6]
								
D. Djukanovic, G. von Hippel, H. B. Meyer et al., Phys. Rev. Lett. 132, 211901 (2024), arXiv: 2309.07491[hep-lat]
 - 
								[7]
								
R. Wang, W. Kou, C. Han et al., Phys. Rev. D 104, 074033 (2021), arXiv: 2108.03550[hep-ph]
 - 
								[8]
								
D. E. Kharzeev, Phys. Rev. D 104, 054015 (2021)
 - 
								[9]
								
R. Wang, W. Kou, Y.-P. Xie et al., Phys. Rev. D 103, L091501 (2021), arXiv: 2102.01610[hep-ph]
 - 
								[10]
								
C. Han, G. Xie, W. Kou et al., Eur. Phys. J. A 58, 105 (2022), arXiv: 2201.08535[hep-ph]
 - 
								[11]
								
R. Wang, C. Han, and X. Chen, Phys. Rev. C 109, L012201 (2024), arXiv: 2309.01416[hep-ph]
 - 
								[12]
								
I. Y. Kobzarev and L. B. Okun, Zh. Eksp. Teor. Fiz. 43, 1904 (1962)
 - 
								[13]
								
H. Pagels, Phys. Rev. 144, 1250 (1966)
 - 
								[14]
								
O. V. Teryaev, Front. Phys. (Beijing) 11, 111207 (2016)
 - 
								[15]
								
M. V. Polyakov and P. Schweitzer, Int. J. Mod. Phys. A 33, 1830025 (2018)
 - 
								[16]
								
X. Ji, Front. Phys. 16, 64601 (2021)
 - 
								[17]
								
X. Ji, Phys. Rev. Lett. 78, 610 (1997)
 - 
								[18]
								
V. D. Burkert, Nature 557, 396 (2018)
 - 
								[19]
								
W. Xiong, Nature 575, 147 (2019)
 - 
								[20]
								
H.-W. Hammer and U.-G. Meißner, Sci. Bull. 65, 257 (2020)
 - 
								[21]
								
R. Dupré, M. Guidal, and M. Vanderhaeghen, Phys. Rev. D 103, 014023 (2021)
 - 
								[22]
								
K. Kumerički, S. Liuti, and H. Moutarde, Eur. Phys. J. A 52, 157 (2016)
 - 
								[23]
								
G. A. Miller, Phys. Rev. C 99, 035202 (2019), arXiv: 1812.02714[nucl-th]
 - 
								[24]
								
I. I. Strakovsky et al., Phys. Rev. C 91, 045207 (2015), arXiv: 1407.3465[nucl-ex]
 - 
								[25]
								
I. I. Strakovsky, L. Pentchev, and A. Titov, Phys. Rev. C 101, 045201 (2020), arXiv: 2001.08851[hep-ph]
 - 
								[26]
								
L. Pentchev and I. I. Strakovsky, Eur. Phys. J. A 57, 56 (2021), arXiv: 2009.04502[hep-ph]
 - 
								[27]
								
X.-Y. Wang, F. Zeng, and I. I. Strakovsky, Phys. Rev. C 106, 015202 (2022), arXiv: 2205.07661[hep-ph]
 - 
								[28]
								
C. Han, W. Kou, R. Wang et al., Phys. Rev. C 107, 015204 (2023), arXiv: 2210.11276[hep-ph]
 - 
								[29]
								
C. Han, W. Kou, R. Wang et al., Eur. Phys. J. A 59, 118 (2023), arXiv: 2211.17102[hep-ph]
 - 
								[30]
								
W. Kou, R. Wang, and X. Chen, Phys. Rev. D 103, 014025 (2021)
 - 
								[31]
								
S. J. Brodsky, L. Frankfurt, J. F. Gunion et al., Phys. Rev. D 50, 3134 (1994), arXiv: hep-ph/9402283
 - 
								[32]
								
L. Frankfurt and M. Strikman, Phys. Rev. D 66, 031502 (2002), arXiv: hep-ph/0205223
 - 
								[33]
								
K. A. Mamo and I. Zahed, Phys. Rev. D 101, 086003 (2020), arXiv: 1910.04707[hep-ph]
 - 
								[34]
								
K. A. Mamo and I. Zahed, Phys. Rev. D 103, 094010 (2021), arXiv: 2103.03186[hep-ph]
 - 
								[35]
								
K. A. Mamo and I. Zahed, Phys. Rev. D 106, 086004 (2022), arXiv: 2204.08857[hepph]
 - 
								[36]
								
P. Benz, O. Braun, H. Butenschön et al., Nucl. Phys. B 79, 10 (1974)
 - 
								[37]
								
Y. Eisenberg, B. Haber, E. Kogan et al., Nucl. Phys. B 38, 349 (1972)
 - 
								[38]
								
H. Seraydaryan et al. (CLAS), Phys. Rev. C 89, 055206 (2014), arXiv: 1308.1363[hep-ex]
 - 
								[39]
								
T. Mibe et al. (CLAS), Phys. Rev. C 76, 052202(R) (2007), arXiv: nucl-ex/0703013
 - 
								[40]
								
T. Mibe et al. (LEPS), Phys. Rev. Lett. 95, 182001 (2005), arXiv: nucl-ex/0506015
 - 
								[41]
								
W. C. Chang et al., Phys. Lett. B 658, 209 (2008), arXiv: nucl-ex/0703034
 - 
								[42]
								
R. Pohl et al. (CREMA), Science 353, 669 (2016)
 - 
								[43]
								
P. Mohr, D. Newell, B. Taylo et al., arXiv: 2409.03787 [hep-ph]