Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-07-13
Phys.Rev. D62 (2000) 114023
Physics
High Energy Physics
High Energy Physics - Phenomenology
45 pages with 11 figures (revtex). Expanded discussion of which features of our result are generic. Final version, to appear i
Scientific paper
10.1103/PhysRevD.62.114023
We extend the McLerran-Venugopalan model for the gluon distribution functions of very large nuclei to larger values of the longitudinal momentum fraction xF. Because gluons with larger values of xF begin to resolve the longitudinal structure of the nucleus, we find that it is necessary to set up a fully three-dimensional formalism for performing the calculation. We obtain a relatively compact expression for the gluon number density provided that the nucleus is sufficiently large and consists of color-neutral nucleons. Our expressions for the gluon number density saturate at small transverse momenta. The nuclear dependence we obtain is such that the number of gluons increases more slowly than the number of nucleons is increased.
Lam Chi-Sing
Mahlon Gregory
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