Soft Contribution to Form Factors of $γ^* p \to Δ^+$ Transition

Details Soft Contribution to Form Factors of $γ^* p \to Δ^+$ Transition Soft Contribution to Form Factors of $γ^* p \to Δ^+$ Transition

1995-09-11

arxiv.org/abs/hep-ph/9509267v3

Phys.Rev. D53 (1996) 6509-6521

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1103/PhysRevD.53.6509

The purely nonperturbative soft contribution to the $\gamma^* p \to \Delta^+$ 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 $G_E^*(Q^2)/G_M^*(Q^2)$ is small for all accessible $Q^2$, in contrast to pQCD expectations that $G_E^*(Q^2) \to -G_M^*(Q^2)$. We also found that the soft contribution to the magnetic form factor is large enough to explain the magnitude of existing experimental data.

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