Evidence for quark-hadron duality in gamma*-p helicity cross sections
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 < 10% over the entire nucleon resonance region, while larger, < 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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1010300
- Report Number(s):
- JLAB-THY-11-07; DOE/OR/23177-1401; arXiv:1101.2016; PRVCAN; TRN: US1101584
- Journal Information:
- Phys. Rev. C, Vol. 83, Issue 03; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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