Neutron structure function moments at leading twist

Journal Article · Tue Feb 27 04:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2714439· OSTI ID:21056879

Osipenko, M ^[1]; Simula, S ^[2]; Kulagin, S ^[3]; Ricco, G ^[4]

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1. Istituto Nazionale di Fisica Nucleare, Sezione di Genova, Genoa, 16146 (Italy)
2. Istituto Nazionale di Fisica Nucleare, Sezione Roma III, Roma, 00146 (Italy)
3. Institute for Nuclear Research of Russian Academy of Science, Moscow, 117312 (Russian Federation)
4. Universita di Genova, Genoa, 16146 (Italy)

The experimental data on F2 structure functions of the proton and deuteron were used to construct their moments. In particular, recent measurements performed with CLAS detector at Jefferson Lab allowed to extend our knowledge of structure functions in the large-x region. The phenomenological analysis of these experimental moments in terms of the Operator Product Expansion permitted to separate the leading and higher twist contributions. Applying nuclear corrections to extracted deuteron moments we obtained the contribution of the neutron. Combining leading twist moments of the neutron and proton we found d/u ratio at x {yields} 1 approaching 0, although 1/5 value could not be excluded. The twist expansion analysis suggests that the contamination of higher twists influences the extraction of the d/u ratio at x {yields} 1 even at Q2-scale as large as 12 (GeV/c)2.

• OSTI ID: 21056879
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 892; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CEBAF ACCELERATOR
CORRECTIONS
DEUTERONS
ELECTRIC MOMENTS
FOUR MOMENTUM TRANSFER
GEV RANGE
MULTIPARTICLE SPECTROMETERS
NEUTRONS
OPERATOR PRODUCT EXPANSION
PARTICLE IDENTIFICATION
PARTICLE KINEMATICS
PROTONS
STRUCTURE FUNCTIONS