The unintegrated gluon distribution from the CCFM equation
Abstract
The gluon distribution f(x, kt2,mu2), unintegrated over the transverse momentum kt of the gluon, satisfies the angular-ordered CCFM equation which interlocks the dependence on the scale kt with the scale μ of the probe. We show how, to leading logarithmic accuracy, the equation can be simplified to a single scale problem. In particular we demonstrate how to determine the two-scale unintegrated distribution f(x,kt2,mu2) from knowledge of the integrated gluon obtained from a unified scheme embodying both BFKL and DGLAP evolution.
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