Dual analytic model of generalized parton distributions |
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Authors: | L. L. Jenkovszky |
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Affiliation: | (1) Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Kiev, Ukraine |
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Abstract: | A model for generalized parton distributions (GPDs) in the form of ∼(x/g 0)(1−x)ᾶ(t), where ᾶ(t) = α(t) − α(0) is the nonlinear part of the Regge trajectory and g 0 is a parameter, g 0 > 1, is presented. For linear trajectories, it reduces to earlier proposals. We compare the calculated moments of these GPDs with the experimental data on form factors and find that the effects from the nonlinearity of Regge trajectories are large. By Fourier transforming the obtained GPDs, we access the spatial distribution of protons in the transverse plane. The relation between dual amplitudes with Mandelstam analyticity and composite models in the infinite-momentum frame is discussed, the integration variable in dual models being associated with the quark longitudinal-momentum fraction x in the nucleon. The text was submitted by the authors in English. |
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