Constituent-quark contribution to lepton-nucleus deep-inelastic scattering

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.1674· OSTI ID:6827411

Zhu, W ^[1]; Shen, J G ^[2]

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1. Department of Physics, East China Normal University, Shanghai 200062, People's Republic of China (CN)
2. Institute of Nuclear Research, Academia Sinica, P.O. Box 800-204, Shanghai 201800, People's Republic of China (CN)

The distortion behavior of the nucleon structure function in the nuclear medium is extensively studied by the constituent-quark model. The nuclear medium makes the oscillator constants of the three constituent quarks in a bound nucleon weaken so as to soften the distribution of the constituent quarks inside a nucleon. In addition, this distribution is smeared by the Fermi motion among the bound nucleons. The sea quark distribution is hardened by the gluon recombination mechanism. The Mueller-Qiu mechanism is improved by taking the coexistence of nuclear shadowing and antishadowing into account and this formulation follows the momentum sum rule for the parton-quark system. A free parameter is chosen on the basis of the quantum chromodynamic vacuum model. The theoretical predications for a series of nuclei with 4{le}{ital A}{le}200 within the kinetic region 0.001{le}{ital x}{le}0.9 are in fair agreement with the existing lepton-nucleus data in the full {ital x} region. Especially, the model predicts that two crossover points of the cross-section ratios {ital R}{sub {mu}}({ital x}) with the horizontal axis {ital R}{sub {mu}}({ital x})=1 at low {ital x} move in the {ital x} direction as the mass number {ital A} increases.

• OSTI ID: 6827411
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 41:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
COMPOSITE MODELS
DEEP INELASTIC SCATTERING
ELEMENTARY PARTICLES
EMC EFFECT
FERMIONS
FIELD THEORIES
FUNCTIONS
HADRONS
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MATHEMATICAL MODELS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTON MODEL
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
SCATTERING
SHADOW EFFECT
STRUCTURE FUNCTIONS