Spin structure of the neutron ({sup 3}He) and the Bjoerken sum rule

Conference · Thu Dec 01 04:00:00 EST 1994

OSTI ID:90771

Meziani, Z E ^[1]

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1. Stanford Univ., CA (United States)

A first measurement of the longitudinal asymmetry of deep-inelastic scattering of polarized electrons from a polarized {sup 3}He target at energies ranging from 19 to 26 GeV has been performed at the Stanford Linear Accelerator Center (SLAC). The spin-structure function of the neutron g{sub 1}{sup n} has been extracted from the measured asymmetries. The Quark Parton Model (QPM) interpretation of the nucleon spin-structure function is examined in light of the new results. A test of the Ellis-Jaffe sum rule (E-J) on the neutron is performed at high momentum transfer and found to be satisfied. Furthermore, combining the proton results of the European Muon Collaboration (EMC) and the neutron results of E-142, the Bjoerken sum rule test is carried at high Q{sup 2} where higher order Perturbative Quantum Chromodynamics (PQCD) corrections and higher-twist corrections are smaller. The sum rule is saturated to within one standard deviation.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (United States)
• DOE Contract Number: FG03-88ER40439; AC03-76SF00515
• OSTI ID: 90771
• Report Number(s): SLAC--444; CONF-930767--; ON: DE95008628
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DEEP INELASTIC SCATTERING
ELECTRON REACTIONS
GEV RANGE 10-100
HELIUM 3 TARGET
NEUTRONS
POLARIZED BEAMS
POLARIZED TARGETS
SPIN
STRUCTURE FUNCTIONS
SUM RULES