Next-to-leading order evolution of generalized parton distributions for DESY HERA and HERMES

2002 ◽  
Vol 65 (5) ◽  
Author(s):  
Andreas Freund ◽  
Martin McDermott
Keyword(s):  
Leading Order ◽  
Parton Distributions ◽  
Generalized Parton Distributions

scholarly journals PARTONIC INTERPRETATION OF GENERALIZED PARTON DISTRIBUTIONS

2011 ◽  
Vol 04 ◽  
pp. 179-189 ◽  
Author(s):  
G. R. GOLDSTEIN ◽  
SIMONETTA LIUTI
Keyword(s):  
Dispersion Relations ◽  
Kinematic Region ◽  
Forward Kinematics ◽  
Leading Order ◽  
Parton Distributions ◽  
Generalized Parton Distributions ◽  
Exclusive Processes

Dispersion relations have been applied to hard exclusive processes suggesting that generalized parton distributions can be fully determined from their values on a kinematical ridge. We show significant pitfalls associated that vitiate this approach. We suggest an improved treatment of this assumption. Secondly, in order for a partonic interpretation to hold throughout the accessible kinematic region, semi-disconnected diagrams should not contribute. We show, however, that this condition is not satisfied for non-forward kinematics at leading order. Lastly we present our recent flexible parameterization of GPDs and indicate its application to neutral pseudoscalar electroproduction.

QUARK ORBITAL ANGULAR MOMENTUM AND GENERALIZED PARTON DISTRIBUTIONS

2003 ◽  
Vol 18 (08) ◽  
pp. 1303-1309 ◽  
Author(s):  
XIANGDONG JI
Keyword(s):  
Angular Momentum ◽  
Quantum Chromodynamics ◽  
Orbital Angular Momentum ◽  
Parton Distributions ◽  
Generalized Parton Distributions ◽  
Quark Orbital Angular Momentum

In this talk, I review the merit of introducing and measuring the quark orbital angular momentum contribution to the spin of the nucleon in the context of quantum chromodynamics.

scholarly journals Moments of nucleon generalized parton distributions in lattice QCD

2003 ◽  
Vol 68 (3) ◽  
Author(s):  
Ph. Hägler ◽  
J. W. Negele ◽  
D. B. Renner ◽  
W. Schroers ◽  
Th. Lippert ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Parton Distributions ◽  
Generalized Parton Distributions
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