Spin duality in the nucleon: Measurements at Jefferson Lab Hall A

Journal Article · Thu Feb 10 00:00:00 EST 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1871649· OSTI ID:20630605

Liyanage, Nilanga ^[1]

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1. University of Virginia, Charlottesville, VA (United States)

The Bloom-Gilman duality has been experimentally demonstrated for spin independent structure functions. Duality is observed when the smooth scaling curve at high momentum transfer is an average over the resonance bumps at lower momentum transfer, but at the same value of scaling variable x. Signs of quark-hadron duality for the spin Dependant structure function g 1 of the proton has been recently reported by the Hermes collaboration and the Jefferson lab Hall B collaboration. Jefferson Lab experiment 01-012 used the polarized 3He target in Hall A for a precision extraction of the neutron spin structure function g{sub 1}{sup n} and the virtual photon asymmetry A{sub 1}{sup n} in the resonance region up to Q2 = 4(GeV/c)2. Data from E01-012 combined with Deep-Inelastic-Scattering data will provide a precision test of quark-hadron duality predictions for neutron spin structure functions. This will be one of the first precision tests of spin and flavor dependence of quark-hadron duality. The demonstration of duality for spin structure functions will enable the use of resonance data to study the nucleon spin structure in the very high x region.

• OSTI ID: 20630605
• Journal Information: AIP Conference Proceedings, Vol. 747, Issue 1; Conference: HiX2004: 2. international workshop on the structure of the nucleon at large Bjorken x, Marseille (France), 26-28 Jul 2004; Other Information: DOI: 10.1063/1.1871649; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
ASYMMETRY
CEBAF ACCELERATOR
DEEP INELASTIC SCATTERING
DUALITY
FLAVOR MODEL
FOUR MOMENTUM TRANSFER
GEV RANGE
HELIUM 3 TARGET
NEUTRONS
PARTICLE KINEMATICS
PHOTONS
POLARIZED TARGETS
PROTONS
QUARK-HADRON INTERACTIONS
RESONANCE
SPIN
STRUCTURE FUNCTIONS