Confinement and cut-off: a model for the pion quark distribution function
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✦ hep-ph
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pionfunctionquarkcut-offdistributionmodelallowsamplitude
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The pion structure function is investigated in a simple pseudo-scalar coupling model of pion and constituent quark fields. The imaginary part of the forward Compton scattering amplitude is evaluated. We show that the introduction of non-perturbative effects, linked through a cut-off to the size of the pion, allows the reproduction of important features of the pion quark distribution function.
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