A study of the internal spin structure of the proton through polarized deep inelastic muon-proton scattering

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7277536

Piegaia, R N

This thesis presents a study of the internal spin structure of the proton through the measurement performed by the European Muon Collaboration, EMC, at the European Center for Nuclear Research, CERN, of the spin asymmetry in the deep-inelastic scattering of longitudinally polarized muons by longitudinally polarized protons. The data obtained considerably extend the kinematic range covered by a previous lower-energy polarized electron-proton scattering experiment. Although the results were found to be in agreement in the region of overlap, the study of the low x range (0.01 < x < 0.1) revealed that data lie below previous experimental extrapolations and theoretical expectations based on models of the nucleon internal spin structure. The integral of the spin-dependent structure function g{sub 1}{sup p} was computed and found to be in disagreement with the Ellis-Jaffe sum rule. The result seems to indicate that only a small fraction of the proton spin originates from the spins of the quarks.

• Research Organization: Yale Univ., New Haven, CT (United States)
• OSTI ID: 7277536
• Country of Publication: United States
• Language: English

Related Subjects

662330 -- Photon &amp; Charged-Lepton Interactions with Hadrons-- (1992)
662410* -- Properties of Baryons &amp; Baryon Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
ASYMMETRY
BARYONS
COMPARATIVE EVALUATIONS
DEEP INELASTIC SCATTERING
ELEMENTARY PARTICLES
EQUATIONS
EVALUATION
FERMIONS
FUNCTIONS
HADRONS
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MUON-NUCLEON INTERACTIONS
MUON-PROTON INTERACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
POSTULATED PARTICLES
PROTONS
QUARKS
SCATTERING
SPIN
STRUCTURE FUNCTIONS
SUM RULES