Abstract
Deep inelastic weak and electromagnetic processes are considered within the parton framework taking the partons to be integrally charged quarks and coloured gluons. Despite the participation of the spin-one gluons in these processes, scaling is shown to be maintained by treating the problem in a unified gauge model based on the groupSU (3)colour⊗SU L (2)⊗U(1). This is a consequence of the vector-dominance type of couplings between the gluons and the weak or electromagnetic vector bosons which are induced by the spontaneous breakdown of gauge symmetry. As a further consequence it is found that in the asymptotic region far above the gluon masses the colour octet parts of the weak and electromagnetic currents of the quarks are damped so that, in particular, the integrally charged quarks behave as fractionally charged quarks in this region.
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References
Bars I, Halpern M B and Yoshimura M 1973Phys. Rev. D7 1233
Bjorken J D and Drell S D 1964 Relativistic Quantum Mechanics (New York: McGraw Hill)
Cheng T P and Wilczek F 1974Phys. Lett. B53 269
Cleymens J and Komen G J 1974Nucl. Phys. B78 396
Cornwall J M and Norton R E 1973Phys. Rev. D8 3338
Feynman R P 1972 Photon Hadron Interactions (New York: Benjamin)
Furman M A and Komen G J 1975Nucl. Phys. B84 323
Gell-Mann M 1964Phys. Lett. 8 214
Glashow S L, Iliopoulos J and Maiani L 1970Phys. Rev. D2 1285
Gross D J and Wilczek F 1973Phys. Rev. D8 3633
Han M Y and Nambu Y 1965Phys. Rev. 139 B1006
Jackiw R and Johnson K 1973Phys. Rev. D8 2386
Lipkin H 1972Phys. Rev. Lett. 28 63
Nambu Y 1957Phys. Rev. 106 1366
Pati J and Salam A 1973Phys. Rev. D8 1240
Palmer R B 1973Phys. Lett. 46B 240
Politzer H D 1974Phys. Rev. D9 2174
Rajasekaran G 1972 Proceedings of the First Symposium on High Energy Physics (editors P K Malhotra, V Gupta and S N Ganguly, organised by the Tata Institute of Fundamental Research under the auspices of the Department of Atomic Energy, Government of India)
Rajasekaran G and Roy P 1975 Pramāna4 222
Roy P 1975 Theory of Lepton-Hadron Proceesses at High Energies (Oxford: Clarendon Press)
Sakurai J J 1960Ann. of Phys. 11 1
Salam A 1968 Proceedings of the Eighth Nobel Symposium (ed. N Svartholm, John Wiley and Sons, New York)
Sehgal L M 1974Phys. Lett. 48B 133
t’Hooft G 1971Nucl. Phys. B35 167
Weinberg S 1967Phys. Rev. Lett. 19 1264
Weinberg S 1973Phys. Rev. D8 4482
Zweig G 1964 Unpublished CERN Report 8182 TH 401
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Rajasekaran, G., Roy, P. Colour gluons and scaling in a unified gauge model. Pramana - J Phys 5, 303–327 (1975). https://doi.org/10.1007/BF02848737
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DOI: https://doi.org/10.1007/BF02848737