Results on nucleon structure functions from polarized and unpolarized deep inelastic muon scattering experiments at CERN
- NIKHEF, Amsterdam, The Netherlands, representing the Spin Muon Collaboration (SMC) and the New Muon Collaboration (NMC) at CERN (Switzerland)
Data are presented on the spin-dependent structure function of the proton, {ital g}{sup {ital p}}{sub 1}, measured in inclusive polarized muon scattering. The first moment of {ital g}{sup {ital p}}{sub 1}({ital x}) is compared with that of earlier experiments and with the Ellis-Jaffe prediction. Also semi-inclusive data are shown, where charged hadrons provide information on spin-flavor correlations. In the context of the quark-parton model the data indicate that quark spins contribute a small fraction to the nucleon spin. All published data of {ital g}{sub 1} in combination confirm the Bjorken sum rule at the 10 percent accuracy level. In a QCD analysis of {ital F}{sup {ital p}}{sub 2} and {ital F}{sup {ital d}}{sub 2}, measured with high precision down to small {ital x} by NMC, the gluon distribution is determined. The {ital F}{sup {ital n}}{sub 2}/{ital F}{sup {ital p}}{sub 2} data are reanalyzed and the Gottfried sum {integral}{sup 1}{sub 0}[{ital F}{sup {ital p}}{sub 2}({ital x}){minus}{ital F}{sup {ital n}}{sub 2}({ital x})]/{ital x} {ital dx} is evaluated. The earlier reported flavor asymmetry in the nucleon is confirmed. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 165602
- Report Number(s):
- CONF-9405132-; ISSN 0094-243X; TRN: 96:002265
- Journal Information:
- AIP Conference Proceedings, Vol. 334, Issue 1; Conference: 14. International IUPAP conference on few body problems in physics, Williamsburg, VA (United States), 26-31 May 1994; Other Information: PBD: 10 May 1995
- Country of Publication:
- United States
- Language:
- English
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