Quark contribution to the proton spin in the chiral quark-meson model

Journal Article · Thu Dec 01 04:00:00 EST 1988 · Mod. Phys. Letters B; (United States)

DOI:https://doi.org/10.1142/S0217732388001987· OSTI ID:6531030

Stern, J ^[1]; Clement, G ^[2]

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1. Laboratoire de Physique Theorique, Universite des Sciences et de la Technologie Houari Boumediene, Alger (DZ)
2. Departement de Physique, Ecole Normale Spuerieure, Vieux-Kouba, Alger (DZ)

It has been argued that, to leading order in the 1/N/sub c/ expansion, very little of the spin of the proton is carried by the helicities of its constituent quarks, in accordance with the results of a recent EMC experiment. The authors investigate this question by a direct computation in the chiral quark-meson model, where the proton spin is generated by cranking a mean field hedgehog baryon. For not too small values of the quark-meson coupling constant, their results are consistent with the EMC data.

• OSTI ID: 6531030
• Journal Information: Mod. Phys. Letters B; (United States), Journal Name: Mod. Phys. Letters B; (United States) Vol. 3:17; ISSN MPLBE
• Country of Publication: United States
• Language: English

Related Subjects

645204 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
645300* -- High Energy Physics-- Particle Invariance Principles & Symmetries
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BARYONS
BOSONS
CHIRAL SYMMETRY
COMPOSITE MODELS
COMPUTER CALCULATIONS
COUPLING CONSTANTS
ELEMENTARY PARTICLES
EMC EFFECT
FERMIONS
HADRONS
MATHEMATICAL MODELS
MESONS
NUCLEONS
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
PROTONS
QUARK MODEL
QUARKS
SPIN
SYMMETRY