Generalized parton distributions from form factors
نویسندگان
چکیده
منابع مشابه
Nucleon Form Factors from Generalized Parton Distributions
M. Guidal,1 M. V. Polyakov,2, 3 A. V. Radyushkin,4, 5, 6 and M. Vanderhaeghen5, 7 Institut de Physique Nucléaire Orsay, F-91406 Orsay, France Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188300, Russia Université de Liège au Sart Tilman, B-4000 Liège 1 Belgium Physics Department, Old Dominion University, Norfolk, VA 23529, USA Thomas Jefferson National Accelerator Facility, Ne...
متن کاملGeneralized parton distributions from nucleon form factors
Results from a recent analysis of the zero-skewness generalized parton distributions (GPDs) for valence quarks are reviewed. The analysis bases on a physically motivated parameterization of the GPDs with a few free parameters adjusted to the nucleon form factor data. The Fourier transforms of the GPDs representing quark densities in the impact parameter plane, as well as moments of the GPDs are...
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The electromagnetic nucleon form factors provide constraints on generalized quark distributions. Key results of the study presented here are a strong dependence of the average impact parameter of quarks on their longitudinal momentum fraction, a striking difference in the t dependence of u and d quark contributions to elastic form factors, and an estimate of the orbital angular momentum carried...
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We present a simple empirical parameterization of the x-and t-dependence of generalized parton distributions at zero skewness, using forward parton distributions as input. A fit to experimental data for the Dirac, Pauli and axial form factors of the nucleon allows us to discuss quantitatively the interplay between longitudinal and transverse partonic degrees of freedom in the nucleon (" nucleon...
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The soft physics approach to form factors and Compton scattering at moderately large momentum transfer is reviewed. It will be argued that in that approach the Compton cross section is given by the Klein-Nishina cross section multiplied by a factor describing the structure of the proton in terms of two new form factors. These form factors as well as the ordinary electromagnetic form factors rep...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2006
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2006.08.048