Geodesic
The role of quark-antiquark pairs within a hadron
Teoretičeskaâ i matematičeskaâ fizika, Tome 30 (1977) no. 2, pp. 291-295 
A. P. Kobushkin. The role of quark-antiquark pairs within a hadron. Teoretičeskaâ i matematičeskaâ fizika, Tome 30 (1977) no. 2, pp. 291-295. http://geodesic.mathdoc.fr/item/TMF_1977_30_2_a13/
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Starting from the analogy with the Bogoliubov theory of superconductivity we construct the wave function of quark in the sea of quark-antiquark pairs. In this approach the transformation connecting the undressed quark and the constituent quark coincides with the Melosh transformation.

[1] P. N. Bogolioubov, Ann. Inst. Henri Poincare, 8 (1968), 163

[2] T. Eguchi, H. Sugawara, Phys. Rev., D10 (1974), 4257

[3] H. Kleinert, Phys. Lett., 59B (1975), 163 | DOI

[4] R. P. Feynman, Photon-Hadron Interactions, W. A. Benjamin, 1972 | MR

[5] H. J. Melosh, Phys. Rev., D9 (1974), 1095

[6] A. P. Kobushkin, V. P. Shelest, Preprint JINR E2-8594, Dubna, 1975