THE DLLA LIMIT OF BFKL IN THE DIPOLE PICTURE

In this work we obtain the DLLA limit of BFKL in the dipole picture an d compare it with HERA data. We demonstrate that in leading - logarith mic - approximation, where alpha(s) is fixed, a transition between the BFKL dynamics and the DLLA limit can be obtained in the region of Q(2 ) = 150 GeV2. We compare this result with the DLLA predictions obtaine d with alpha(s) running. In this case a transition is obtained at low Q(2) (less than or equal to 5 GeV2). This demonstrates the importance of the next-to-leading order corrections to the BFKL dynamics. Our con clusion is that the F-2 structure function is not the best observable for the determination of the dynamics, since there is great freedom in the choice of the parameters used in both BFKL and DLLA predictions. (C) 1998 Elsevier Science B.V. All rights reserved.