Precision Measurement of the Spin Structure of the Proton and the Deuteron
- Old Dominion Univ., Norfolk, VA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Experiment E155 at the Stanford Linear Accelerator Center measured the spin structure functions g1 and g2 of the proton and deuteron using deep inelastic scattering of 50 GeV polarized electrons from dynamically polarized, solid 15NH3 and 6LiD targets. Three independent spectrometers, covering a large kinematic region, 0.014 < xBjorken < 0.9 and 1 < Q2 < 40 (GeV/c)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 (3He) 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 spsins. The gluon contribution to the nucleon spin is confirmed to be significant.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC02-76SF00515;
- OSTI ID:
- 1454231
- Report Number(s):
- SLAC-R--557; UC-414
- Country of Publication:
- United States
- Language:
- English
Similar Records
Precision Measurement of the Spin Structure of the Proton and the Deuteron
A Precision Measurement of the Spin Structure Functions f^p_1 and g^g_1
Spin Structure Functions g{sub 1} and g{sub 2} for the Proton and Deuteron
Technical Report
·
Fri May 26 20:00:00 EDT 2000
·
OSTI ID:763861
A Precision Measurement of the Spin Structure Functions f^p_1 and g^g_1
Technical Report
·
Sun Dec 12 19:00:00 EST 2004
·
OSTI ID:839779
Spin Structure Functions g{sub 1} and g{sub 2} for the Proton and Deuteron
Technical Report
·
Tue Apr 06 20:00:00 EDT 1999
·
OSTI ID:10044