Quantum structure of the non-Abelian Weizs{umlt a}cker-Williams field for a very large nucleus
- Department of Physics, Columbia University, New York, New York 10027 (United States)
We consider the McLerran-Venugopalan model for calculation of the small-x part of the gluon distribution function for a very large ultrarelativistic nucleus at weak coupling. We construct the Feynman diagrams which correspond to the classical Weizs{umlt a}cker-Williams field found previously [Yu. V. Kovchegov, Phys. Rev. D {bold 54}, 5463 (1996)] as a solution of the classical equations of motion for the gluon field in the light-cone gauge. Analyzing these diagrams we obtain a limit for the McLerran-Venugopalan model. We show that as long as this limit is not violated a classical field can be used for the calculation of scattering amplitudes. {copyright} {ital 1997} {ital The American Physical Society}
- DOE Contract Number:
- FG02-94ER40819
- OSTI ID:
- 562431
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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