Implication of the overlap representation for modelling generalized parton distributions |
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Authors: | DS Hwang D Müller |
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Institution: | 1. Department of Physics, Sejong University, Seoul 143-747, South Korea;2. Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany |
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Abstract: | Based on a field theoretically inspired model of light-cone wave functions, we derive valence-like generalized parton distributions and their double distributions from the wave function overlap in the parton number conserved s-channel. The parton number changing contributions in the t-channel are restored from duality. In our construction constraints of positivity and polynomiality are simultaneously satisfied and it also implies a model dependent relation between generalized parton distributions and transverse momentum dependent parton distribution functions. The model predicts that the t -behavior of resulting hadronic amplitudes depends on the Bjorken variable xBj. We also propose an improved ansatz for double distributions that embeds this property. |
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Keywords: | 11 30 Cp 12 39 Ki 13 40 Gp 13 60 Fz |
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