Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-11-03
Phys.Rev.D75:094003,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
42 pages, 21 figures
Scientific paper
10.1103/PhysRevD.75.094003
We propose a physically motivated parametrization for the unpolarized generalized parton distributions. At zero value of the skewness variable, $\zeta$, the parametrization is constrained by simultaneously fitting the experimental data on both the nucleon elastic form factors and the deep inelastic structure functions. A rich phenomenology can be addressed based on this parametrization. In particular, we track the behavior of the average: {\it i)} interparton distances as a function of the momentum fraction, $X$, {\it ii)} $X$ as a function of the four-momentum transfer, $t$; and {\it iii)} the intrinsic transverse momentum $k_\perp$ as a function of $X$. We discuss the extension of our parametrization to $\zeta \neq 0$ where additional constraints are provided by higher moments of the generalized parton distributions obtained from {\it ab initio} lattice QCD calculations.
Ahmad Saeed
Honkanen Heli
Liuti Simonetta
Taneja Swadhin K.
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