Soft Contribution to Form Factors of ${\gamma }^{\ast }p\to {\Delta }^{+}$ Transition

Abstract

The purely nonperturbative soft contribution to the ${\gamma }^{\ast }p\to {\Delta }^{+}$ transition form factors is estimated using the local quark-hadron duality approach. Our results show that the soft contribution is dominated by the magnetic transition: the ratio $G_E^{\ast }(Q^2)/G_M^{\ast }(Q^2)$ is small for all accessible $Q^2$, in contrast to pQCD expectations that $G_E^{\ast }(Q^2)\to -G_M^{\ast }(Q^2)$. We also found that the soft contribution to the magnetic form factor is large enough to explain the magnitude of existing experimental data.

29 pages, REVTeX, 5 eps-figures in uuencoded gz-compressed .tar file

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Cited by in corpus (14)

• Electromagnetic excitation of the Delta(1232)-resonance
• Electroproduction of the Delta Resonance at High Momentum Transfer
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• Light-Cone Sum Rules for the Nucleon Form Factors
• Form Factors and QCD in Spacelike and Timelike Region
• Light Cone Sum Rules for gamma* N -> Delta Transition Form Factors
• Approach to Perturbative Results in the N-Delta Transition
• Rho-meson form factors and QCD sum rules
• The Decay Properties of the 1^{-+} Hybrid State
• Electromagnetic Nucleon-to-Delta Transition in Holographic QCD
• Study of polarized-e polarized-p --> e-prime p pi0 in the Delta(1232) mass region using polarization asymmetries
• Light-cone sum rules for the $N\gamma \Delta$ transitions for real photons
• N to $\Delta$ transition amplitudes from QCD sum rules
• Low-Q^2 scaling behavior of the form-factor ratios for the NΔ(1232)-transition