Precision Measurement of the Proton Spin Structure Function g1p
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Authors
E143 Collaboration
Abe, K.
Akagi, T.
Anthony, P L.
Antonov, R D.
Arnold, R G.
Averett, T.
Band, H R.
Bauer, J M.
Borel, H.
Subjects
Advisors
Date of Issue
1994-08
Date
Publisher
SLAC
Language
Abstract
We have measured the ratio g[sup p][sub 1]/F[sup p][sub 1] over the range 0.029 < x < 0.8 and 1.3 < Q2 < 10 (GeV/c)2 using deep-inelastic scattering of polarized electrons from polarized ammonia. An evaluation of the integral (integral)g[sup p][sub 1](x,Q2)dx at fixed Q2 = 3 (GeV/c)2 yields 0.127 ± 0.004(stat) ± 0.010(syst), in agreement with previous experiments, but well below the Ellis-Jaffe sum rule prediction of 0.160 ± 0.006. In the quark-parton model, this implies Delta q = 0.27 ± 0.10.
Type
Article
Description
The article of record may be found at https://doi.org/10.1103/PhysRevLett.74.346
Series/Report No
Department
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Abe, K., et al. "Precision measurement of the proton spin structure function g 1 p." Physical Review Letters 74.3 (1995): 346.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.