On the Calculation of the NLO Virtual Photon Impact Factor

Abstract

The definition of the virtual photon impact factor involves the integration of the s-channel discontinuity of the photon-Reggeon scattering amplitude over the right cut. It permits to formulate a new approach for the calculation of the impact factor based on analytical properties of the amplitude in question. In the next-to-leading order it may give a possibility for considerable simplification of the calculation. We have shown that a part of the diagrams contributing to the impact factor can be treated without their real calculation.

18 pages, latex, axodraw.sty for figures, version to appear in Nucl. Phys. B

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• Non-forward NLO BFKL Kernel
• A Global Fit to Scattering Data with NLL BFKL Resummations
• Electroproduction of two light vector mesons in the next-to-leading approximation
• The next-to-leading order jet vertex for Mueller-Navelet and forward jets revisited
• The impact factor for the virtual photon to light vector meson transition
• Inclusive production of a pair of hadrons separated by a large interval of rapidity in proton collisions
• NLO Corrections to the γ* Impact Factor: First Numerical Results for the Real Corrections to γ*_L
• High-energy resummation in ${\Lambda }_c$ baryon production
• High-energy resummation in heavy-quark pair photoproduction
• High-energy resummed distributions for the inclusive Higgs-plus-jet production at the LHC
• Higher Order Effects in Non Linear Evolution from a Veto in Rapidities
• Electroproduction of two light vector mesons in next-to-leading BFKL: study of systematic effects
• Solving the BFKL Equation in the Next-to-Leading Approximation
• Scattering of color dipoles: from low to high energies
• Deep inelastic scattering and prompt photon production within the framework of quark Reggeization hypothesis
• Azimuthal decorrelation of forward jets in Deep Inelastic Scattering
• BFKL resummation effects in the gamma* gamma* total hadronic cross section
• The quark induced Mueller-Tang jet impact factor at next-to-leading order
• The Gluon-Induced Mueller-Tang Jet Impact Factor at Next-to-Leading Order
• Quark-Antiquark Exchange in ${\gamma }^{\ast }{\gamma }^{\ast }$ Scattering
• The ${\gamma }^{\ast }{\gamma }^{\ast }$ total cross section in next-to-leading order BFKL and LEP2 data
• Hybrid kT-factorization and impact factors at NLO
• A Variable Flavour Number Scheme for Heavy Quark Production at Small x
• The New F_L Measurement from HERA and the Dipole Model
• Next-leading BFKL effects in forward-jet production at HERA
• Phenomenology of jet physics in the BFKL formalism at NLO
• Next-to-leading BFKL phenomenology of forward-jet cross sections at HERA
• Heavy quark impact factor in kT-factorization
• Elastic scattering of virtual photons via quark loop in Double-Logarithmic Approximation
• Light-by-light scattering in Double-Logarithmic Approximation
• The Virtual Photon-Gluon Impact Factor with Massive Quarks and Exact Gluon Kinematics
• Diffractive photon production at high momentum transfer in $ep$ collisions
• The Real Corrections to the Gamma* Impact Factor: First Numerical Results