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The generalized parton distribution function (E^u+E^d)(x,xi,t) of the nucleon in the chiral quark soliton model

J. Ossmann·M. V. Polyakov·P. Schweitzer·D. Urbano·K. Goeke
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Abstract

The unpolarized spin-flip isoscalar generalized parton distribution function (E^u+E^d)(x,xi,t) is studied in the large-Nc limit at a low normalization point in the framework of the chiral quark-soliton model. This is the first study of generalized parton distribution functions in this model, which appear only at the subleading order in the large-Nc limit. Particular emphasis is put therefore on the demonstration of the theoretical consistency of the approach. The forward limit of (E^u+E^d)(x,xi,t) of which only the first moment -- the anomalous isoscalar magnetic moment of the nucleon -- is known phenomenologically, is computed numerically. Observables sensitive to (E^u+E^d)(x,xi,t) are discussed.

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J. Ossmann, M. V. Polyakov, P. Schweitzer, D. Urbano, K. Goeke. 2005-02-15. The generalized parton distribution function (E^u+E^d)(x,xi,t) of the nucleon in the chiral quark soliton model. https://doi.org/10.1103/physrevd.71.034011

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