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

Abstract

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.

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

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• BFKL pomeron in the next-to-leading approximation
• Combined Measurement and QCD Analysis of the Inclusive ep Scattering Cross Sections at HERA
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• High-Energy QCD Asymptotics of Photon-Photon Collisions
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• The BFKL high energy asymptotics in the next-to-leading approximation
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Cited by in corpus (30)

• Conformal Regge theory
• Transverse momentum dependent gluon density from DIS precision data
• Gluon saturation in dijet production in p-Pb collisions at Large Hadron Collider
• The hard to soft Pomeron transition in small x DIS data using optimal renormalization
• Description of F2 and FL at small x using a collinearly-improved BFKL resummation
• Structure Functions
• Exclusive J/Psi and Psi(2s) photo-production as a probe of QCD low x evolution equations
• Improved Geometrical Scaling at the LHC
• Next-to-leading and resummed BFKL evolution with saturation boundary
• Single bottom quark production in kT-factorisation
• Gluon Regge trajectory at two loops from Lipatov's high energy effective action
• Deeply Virtual Compton Scattering from Gauge/Gravity Duality
• Soft Pomeron in Holographic QCD
• The quark induced Mueller-Tang jet impact factor at next-to-leading order
• Quantitative Study of Geometrical Scaling in Deep Inelastic Scattering at HERA
• The Gluon-Induced Mueller-Tang Jet Impact Factor at Next-to-Leading Order
• Unity of pomerons from gauge/string duality
• CGC/saturation approach: a new impact-parameter dependent model
• The Green Function for the BFKL Pomeron and the Transition to DGLAP Evolution
• Quantitative Study of Different Forms of Geometrical Scaling in Deep Inelastic Scattering at HERA
• Decoupling of the leading contribution in the discrete BFKL Analysis of High-Precision HERA Data
• The Behaviour of the Green Function for the BFKL Pomeron with Running Coupling
• BFKL Evolution as a Communicator Between Small and Large Energy Scales
• BFKL Pomeron: modeling confinement
• The Effect of the Infrared Phase of the Discrete BFKL Pomeron on Transverse Momentum Diffusion
• BFKL pomeron with massive gluons and running coupling
• BFKL equation with running QCD coupling and HERA data
• The Effect of a Rapidity Gap Veto on the Discrete BFKL Pomeron
• Origin of the Q^2-dependence of the DIS structure functions
• Investigation of High Energy Behaviour of HERA Data