Experimental moments of the nucleon structure function F2
arXiv:hep-ph/0610043 · doi:10.1016/j.nuclphysbps.2007.08.079
Abstract
Experimental data on the F2 structure functions of the proton and deuteron, including recent results from CLAS at Jefferson Lab, have been used to construct their n<=12 moments. A comprehensive analysis of the moments in terms of the operator product expansion has been performed to separate the moments into leading and higher twist contributions. Particular attention was paid to the issue of nuclear corrections in the deuteron, when extracting the neutron moments from data. The difference between the proton and neutron moments was compared directly with lattice QCD simulations. Combining leading twist moments of the neutron and proton we found the d/u ratio at x->1 approaching 0, although the precision of the data did not allow to exclude the 1/5 value. The higher twist components of the proton and neutron moments suggest that multi-parton correlations are isospin independent.
Proceedings of 13th International QCD Conference (QCD 06), Montpellier, France, July 3-7th 2006
References in corpus (7)
- Chiral extrapolation of lattice moments of proton quark distributions
- Moments of Nucleon Light Cone Quark Distributions Calculated in Full Lattice QCD
- A Kinematically Complete Measurement of the Proton Structure Function F2 in the Resonance Region and Evaluation of Its Moments
- A lattice determination of moments of unpolarised nucleon structure functions using improved Wilson fermions
- Measurement of the Deuteron Structure Function F2 in the Resonance Region and Evaluation of Its Moments
- Soft gluon effects in the extraction of higher twists at large Bjorken x
- Leading twist moments of the neutron structure function F2n