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

Conference · Tue Feb 01 04:00:00 EST 1994

OSTI ID:10139718

Meziani, Z E ^[1]

---

1. Stanford Univ., CA (United States). Dept. of Physics

A first measurement of the longitudinal asymmetry of deepinelastic scattering of Polarized electrons from a Polarized {sup 3}He target at energies ranging from 19 to 26 GeV ha, 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 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 saturated to within one standard deviation.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 10139718
• Report Number(s): SLAC-PUB--6433; CONF-930767--5; ON: DE94009463
• Country of Publication: United States
• Language: English

Related Subjects

662410
663420
663510
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
A = 1-5
ASYMMETRY
ELECTRON REACTIONS
HELIUM 3 TARGET
LEPTON-INDUCED REACTIONS AND SCATTERING
NEUTRONS
PARTON MODEL
PROPERTIES OF BARYONS AND BARYON RESONANCES
QUARK MODEL
SPIN
STRUCTURE FUNCTIONS
SUM RULES