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Title: Precision Measurement of the Spin Structure of the Proton and the Deuteron

Abstract

Experiment E155 at the Stanford Linear Accelerator Center measured the spin structure functions g{sub 1} and g{sub 2} of the proton and deuteron using deep inelastic scattering of 50 GeV polarized electrons from dynamically polarized, solid {sup 15}NH{sub 3} and LiD targets. Three independent spectrometers, covering a large kinematic region, 0.014 < x{sub Bjorken} < 0.9 and 1 < Q{sup 2} < 40 (GeV/c){sup 2}, detected 200 million events. A fully self-consistent and statistically sound approach to calculating radiative corrections was developed, providing well-defined statistical errors for the E155 data set. Also, a comprehensive fit to the global data set was created which simultaneously describes all existing data on p, d and n ({sup 3}He) targets. The results represent a significant increase in the accuracy of the world data set and, together with the existing data, give improved results for the Bjorken sum rule and the quark spins. The gluon contribution to the nucleon spin is confirmed to be significant.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
763861
Report Number(s):
SLAC-R-557
TRN: US0004892
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 27 May 2000
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DEEP INELASTIC SCATTERING; DEUTERONS; GLUONS; NUCLEONS; PROTONS; QUARKS; RADIATIVE CORRECTIONS; SPIN; STANFORD LINEAR ACCELERATOR CENTER; STRUCTURE FUNCTIONS; SUM RULES

Citation Formats

Wesselmann, Frank R. Precision Measurement of the Spin Structure of the Proton and the Deuteron. United States: N. p., 2000. Web. doi:10.2172/763861.
Wesselmann, Frank R. Precision Measurement of the Spin Structure of the Proton and the Deuteron. United States. doi:10.2172/763861.
Wesselmann, Frank R. Sat . "Precision Measurement of the Spin Structure of the Proton and the Deuteron". United States. doi:10.2172/763861. https://www.osti.gov/servlets/purl/763861.
@article{osti_763861,
title = {Precision Measurement of the Spin Structure of the Proton and the Deuteron},
author = {Wesselmann, Frank R},
abstractNote = {Experiment E155 at the Stanford Linear Accelerator Center measured the spin structure functions g{sub 1} and g{sub 2} of the proton and deuteron using deep inelastic scattering of 50 GeV polarized electrons from dynamically polarized, solid {sup 15}NH{sub 3} and LiD targets. Three independent spectrometers, covering a large kinematic region, 0.014 < x{sub Bjorken} < 0.9 and 1 < Q{sup 2} < 40 (GeV/c){sup 2}, detected 200 million events. A fully self-consistent and statistically sound approach to calculating radiative corrections was developed, providing well-defined statistical errors for the E155 data set. Also, a comprehensive fit to the global data set was created which simultaneously describes all existing data on p, d and n ({sup 3}He) targets. The results represent a significant increase in the accuracy of the world data set and, together with the existing data, give improved results for the Bjorken sum rule and the quark spins. The gluon contribution to the nucleon spin is confirmed to be significant.},
doi = {10.2172/763861},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {5}
}

Technical Report:

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