The DLLA limit of BFKL in the Dipole Picture

Details The DLLA limit of BFKL in the Dipole Picture The DLLA limit of BFKL in the Dipole Picture

1998-07-15

arxiv.org/abs/hep-ph/9807389v1

Phys.Lett. B437 (1998) 177-183

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 2 figures, Accepted for publication in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(98)00893-4

In this work we obtain the DLLA limit of BFKL in the dipole picture and compare it with HERA data. We demonstrate that in leading-logarithmic- approximation, where $\alpha_s$ is fixed, a transition between the BFKL dynamics and the DLLA limit can be obtained in the region of $Q^2 \approx 150 GeV^2$. We compare this result with the DLLA predictions obtained with $\alpha_s$ running. In this case a transition is obtained at low $Q^2$ $(\le 5 GeV^2)$. This demonstrates the importance of the next-to-leading order corrections to the BFKL dynamics. Our conclusion 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.

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