Experimental moments of the nucleon structure function F2

Journal Article · Sat Dec 01 04:00:00 EST 2007 · Nuclear Physics B - Proceedings Supplements

DOI:https://doi.org/10.1016/j.nuclphysbps.2007.08.079· OSTI ID:892993

Osipenko, Mikhail; Melnitchouk, W; Simula, Silvano; Kulagin, Sergey; Ricco, Giovanni

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.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA
• Sponsoring Organization: USDOE - Office of Energy Research (ER)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 892993
• Report Number(s): JLAB-PHY-06-524; DOE/ER/40150-4059; hep-ph/0610043
• Journal Information: Nuclear Physics B - Proceedings Supplements, Journal Name: Nuclear Physics B - Proceedings Supplements Vol. 174
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
ISOSPIN
NEUTRONS
NUCLEONS
OPERATOR PRODUCT EXPANSION
PROTONS
QUANTUM CHROMODYNAMICS
STRUCTURE FUNCTIONS