Using HERA Data to Determine the Infrared Behaviour of the BFKL Amplitude

Details Using HERA Data to Determine the Infrared Behaviour of the BFKL Amplitude Using HERA Data to Determine the Infrared Behaviour of the BFKL Amplitude

2010-05-03

arxiv.org/abs/1005.0355v2

Eur.Phys.J.C70:983-998,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 11 figures. v2: revised version published in Eur. Phys. J. C

Scientific paper

10.1140/epjc/s10052-010-1500-6

We determine the infrared behaviour of the BFKL forward amplitude for gluon-gluon scattering. Our approach, based on the discrete pomeron solution, leads to an excellent description of the new combined inclusive HERA data at low values of x (<0.01) and at the same time determines the unintegrated gluon density inside the proton, for squared transverse momenta of the gluon less than 100 GeV^2. The phases of this amplitude are sensitive to the non-perturbative gluonic dynamics and could be sensitive to the presence of Beyond-the-Standard-Model particles at very high energies.

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