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- Title
Nucleon form factors, generalized parton distributions and quark angular momentum.
- Authors
Diehl, Markus; Kroll, Peter
- Abstract
We extract the individual contributions from u and d quarks to the Dirac and Pauli form factors of the proton, after a critical examination of the available measurements of electromagnetic nucleon form factors. From this data we determine generalized parton distributions for valence quarks, assuming a particular form for their functional dependence. The result allows us to study various aspects of nucleon structure in the valence region. In particular, we evaluate Ji's sum rule and estimate the total angular momentum carried by valence quarks at the scale μ=2 GeV to be $J_{v}^{u} = 0.230^{+ 0.009}_{- 0.024}$ and $J_{v}^{d} = -0.004^{+ 0.010}_{- 0.016}$.
- Subjects
PARTICLES (Nuclear physics); PARTONS; ANGULAR momentum (Mechanics); ELECTROMAGNETISM; VALENCE quark; DATA distribution
- Publication
European Physical Journal C -- Particles & Fields, 2013, Vol 73, Issue 4, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-013-2397-7