Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-08-02
Eur.Phys.J.C63:407-421,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
29 pages, 8 figures; added references, changed text in several places
Scientific paper
10.1140/epjc/s10052-009-1073-4
We propose a physically motivated parametrization for the unpolarized generalized parton distributions, H and E, valid at both zero and non-zero values of the skewness variable, \zeta. Our approach follows a previous detailed study of the \zeta=0 case where H and E were determined using constraints from simultaneous fits of the experimental data on both the nucleon elastic form factors and the deep inelastic structure functions in the non singlet sector. Additional constraints at \zeta \neq 0 are provided by lattice calculations of the higher moments of generalized parton distributions. We illustrate a method for extracting generalized parton distributions from lattice moments based on a reconstruction using sets of orthogonal polynomials. The inclusion in our fit of data on Deeply Virtual Compton Scattering is also discussed. Our method provides a step towards a model independent extraction of generalized distributions from the data. It also provides an alternative to double distributions based phenomenological models in that we are able to satisfy the polynomiality condition by construction, using a combination of experimental data and lattice, without resorting to any specific mathematical construct.
Ahmad Saeed
Honkanen Heli
Liuti Simonetta
Taneja Swadhin K.
No associations
LandOfFree
Generalized Parton Distributions from Hadronic Observables: Non-Zero Skewness does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Generalized Parton Distributions from Hadronic Observables: Non-Zero Skewness, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Generalized Parton Distributions from Hadronic Observables: Non-Zero Skewness will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-244485