Saturation and BFKL dynamics in the HERA data at small x

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dc.creatorIancu, E.
dc.creatorItakura, K.
dc.creatorMunier, S.
dc.date2003-10-30
dc.date.accessioned2026-07-07T10:29:00Z
dc.date.available2026-07-07T10:29:00Z
dc.descriptionWe show that the HERA data for the inclusive structure function F_2(x,Q^2) for x < 0.01 and 0.045 < Q^2 < 45 GeV^2 can be well described within the color dipole picture, with a simple analytic expression for the dipole-proton scattering amplitude, which is an approximate solution to the non-linear evolution equations in QCD. For dipole sizes less than the inverse saturation momentum 1/Q_s(x), the scattering amplitude is the solution to the BFKL equation in the vicinity of the saturation line. It exhibits geometric scaling and scaling violations by the diffusion term. For dipole sizes larger than 1/Q_s(x), the scattering amplitude saturates to one. The fit involves three parameters: the proton radius R, the value x_0 of x at which the saturation scale Q_s equals 1GeV, and the logarithmic derivative of the saturation momentum λ. The value of λextracted from the fit turns out to be consistent with a recent calculation using the next-to-leading order BFKL formalism.
dc.description15 pages, 3 figures, 3 tables
dc.identifierhttps://arxiv.org/abs/hep-ph/0310338
dc.identifierhttp://arxiv.org/abs/hep-ph/0310338
dc.identifierPhys.Lett.B590:199-208,2004
dc.identifierdoi:10.1016/j.physletb.2004.02.040
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177644
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSaturation and BFKL dynamics in the HERA data at small x
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