Leading and higher twists in proton, neutron and deuteron unpolarized structure functions F2 [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 2007.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- 603-605 : digital, PDF file
- Additional Creators
- Thomas Jefferson National Accelerator Facility (U.S.), United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- We summarize the results of a recent global analysis of proton and deuteron F2 structure function world data performed over a large range of kinematics, including recent measurements done at JLab with the CLAS detector. From these data the lowest moments (n≤10) of the unpolarized structure functions are determined with good statistics and systematics. The Q2 evolution of the extracted moments is analyzed in terms of an OPE-based twist expansion, taking into account soft-gluon effects at large x. A clean separation among the leading- and higher-twist terms is achieved. By combining proton and deuteron measurements the lowest moments of the neutron F2 structure function are determined and its leading-twist term is extracted. Particular attention is paid to nuclear effects in the deuteron, which become increasingly important for the higher moments. Our results for the non-singlet, isovector (p-n) combination of the leading-twist moments are used to test recent lattice simulations. We also determine the lowest few moments of the higher-twist contributions, and find these to be approximately isospin independent, suggesting the possible dominance of ud correlations over uu and dd in the nucleon.
- Report Numbers
- E 1.99:jlab-phy-06-610
E 1.99: doe/er/40150-4266
E 1.99: hep-ph/0610153
hep-ph/0610153
doe/er/40150-4266
jlab-phy-06-610 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
03/01/2007.
"jlab-phy-06-610"
" doe/er/40150-4266"
" hep-ph/0610153"
Eur.Phys.J.A 31
4th International Conference on Quarks and Nuclear Physics (QNP06), Madrid, Spain, 5-10 Jun 2006.
S. Simula. - Funding Information
- AC05-84ER40150
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