Parton content of the nucleon from distribution amplitudes and transition distribution amplitudes

Details Parton content of the nucleon from distribution amplitudes and transition distribution amplitudes Parton content of the nucleon from distribution amplitudes and transition distribution amplitudes

2009-05-25

arxiv.org/abs/0905.4018v2

Phys.Rev.D80:014017,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

comments and references added; version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.80.014017

The nucleon distribution amplitudes and the nucleon-to-pion transition distribution amplitudes are investigated at leading twist within the frame of a light-cone quark model. The distribution amplitudes probe the three-quark component of the nucleon light-cone wave function, while higher order components in the Fock-space expansion of the nucleon state are essential to describe the nucleon-to-pion transition distribution amplitudes. Adopting a meson-cloud model of the nucleon the nucleon-to-pion transition distribution amplitudes are calculated for the first time.

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