We solve a unified integral equation to obtain the x,QT and Q
dependence of the gluon distribution of a proton in the small x regime; where
x and QT are the longitudinal momentum fraction and the transverse
momentum of the gluon probed at a scale Q. The equation generates a gluon
with a steep x−λ behaviour, with λ∼0.5, and a QT
distribution which broadens as x decreases. We compare our solutions with, on
the one hand, those that we obtain using the double-leading-logarithm
approximation to Altarelli-Parisi evolution and, on the other hand, to those
that we determine from the BFKL equation.Comment: LaTeX file with 10 postscript figures (uuencoded