Light-cone sum rule approach for Baryon form factors

Abstract

We present the state-of-the-art of the light-cone sum rule approach to Baryon form factors. The essence of this approach is that soft Feynman contributions are calculated in terms of small transverse distance quantities using dispersion relations and duality. The form factors are thus expressed in terms of nucleon wave functions at small transverse separations, called distribution amplitudes, without any additional parameters. The distribution amplitudes, therefore, can be extracted from the comparison with the experimental data on form factors and compared to the results of lattice QCD simulations.

8 pages,7 figures accepted for publication in "Few-Body Systems" special issue "Nucleon Resonances"

References in corpus (9)

• Global analysis of proton elastic form factor data with two-photon exchange corrections
• Nucleon Form Factors in QCD
• Light Cone Sum Rules for the pi0-gamma*-gamma Form Factor Revisited
• Measurements of the Electric Form Factor of the Neutron up to Q2=3.4 GeV2 using the Reaction He3(e,e'n)pp
• Transition form factors ${\gamma }^{\ast }\gamma \to \eta$ and ${\gamma }^{\ast }\gamma \to {\eta }^{\prime }$ in QCD
• Baryon Operators of Higher Twist in QCD and Nucleon Distribution Amplitudes
• Light-cone Distribution Amplitudes of the Nucleon and Negative Parity Nucleon Resonances from Lattice QCD
• Electroproduction of the N*(1535) resonance at large momentum transfer
• Nucleon Form Factors to Next-to-Leading Order with Light-Cone Sum Rules