Evidence for quark-hadron duality in {gamma}*p helicity cross sections

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.035203· OSTI ID:21499525

Malace, S P ^[1]; Melnitchouk, W ^[2]; Psaker, A ^[3]

---

1. Department of Physics, Duke University, Durham, North Carolina 27708 (United States)
2. Jefferson Lab, Newport News, Virginia 23606 (United States)
3. American University of Nigeria, Yola (Nigeria)

Combining data on unpolarized and polarized inclusive proton structure functions, we perform the first detailed study of quark-hadron duality in individual helicity-1/2 and 3/2 virtual photoproduction cross sections. We find that duality is realized more clearly in the helicity-1/2 channel, with duality-violating corrections < or approx. 10% over the entire nucleon resonance region, while larger, < or approx. 20% corrections are found in the helicity-3/2 sector. The results are in general agreement with quark model expectations, and suggest that data above the {Delta} resonance region may be used to constrain both spin-averaged and spin-dependent parton distributions.

• OSTI ID: 21499525
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevC.83.035203; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRECTIONS
CROSS SECTIONS
DISTRIBUTION
DUALITY
HELICITY
PHOTOPRODUCTION
PROTONS
QUARK MODEL
QUARK-HADRON INTERACTIONS
RESONANCE
SPIN
STRUCTURE FUNCTIONS
ANGULAR MOMENTUM
BARYONS
BASIC INTERACTIONS
COMPOSITE MODELS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
FUNCTIONS
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES