Spin structure functions of the neutron g{sub 1}{sup n}: SLAC E154 results

Journal Article · Sun Apr 20 04:00:00 EDT 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.53727· OSTI ID:21167639

Meziani, Zein-Eddine ^[1]

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1. Department of Physics, Temple University, Philadelphia, Philadelphia 19122 (United States)

We report on a precision measurement of the neutron spin structure function g{sub 1}{sup n} using deep inelastic scattering of polarized electrons by polarized {sup 3}He. For the kinematic range 0.014<x<0.7 and 1(GeV/c){sup 2}<Q{sup 2}<17(GeV/c){sup 2}, we obtain {integral}{sub 0.014}{sup 0.7} g{sub 1}{sup n}(x)dx=-0.036{+-}0.004(stat){+-}0.005(syst) at an average Q{sup 2}=5(GeV/c){sup 2}. We find relatively large negative values for g{sub 1}{sup n} at low x. The results call into question the usual Regge theory method for extrapolating to x=0 to find the full neutron integral {integral}{sub 0}{sup 1}g{sub 1}{sup n}(x)dx, needed for testing quark-parton model and QCD sum rules.

• OSTI ID: 21167639
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 407; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
DEEP INELASTIC SCATTERING
ELECTRON BEAMS
ELECTRON REACTIONS
ELECTRONS
FOUR MOMENTUM TRANSFER
GEV RANGE
HELIUM 3 TARGET
NEUTRONS
PARTICLE KINEMATICS
POLARIZED BEAMS
POLARIZED TARGETS
QUANTUM CHROMODYNAMICS
QUARKS
SPIN
STANFORD LINEAR ACCELERATOR CENTER
STRUCTURE FUNCTIONS
SUM RULES