Pion density in nuclei and deep-inelastic lepton scattering

Journal Article · Wed Feb 01 04:00:00 EST 1984 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.29.398· OSTI ID:5199135

Berger, E L; Coester, F; Wiringa, R B

Recent data indicate that quark densities in a high-A nucleus differ significantly from those measured in the free-nucleon case. We examine whether this effect can be explained in terms of deep-inelastic scattering from mesons responsible for nuclear binding. Although features of the data are reproduced qualitatively, we are unable to approach a quantitative description of the magnitude of the experimental effect at small x unless we postulate an enhanced pion density of about 0.4 extra pions per nucleon (roughly three times that provided by conventional nuclear models), and/or make assumptions about the small-x behavior of the meson structure function which are inconsistent with available data. These conclusions are insensitive to the manner in which we impose momentum conservation. The slope of the ratio of structure functions vs x is reproduced easily in the range 0.05

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 5199135
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 29:3; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BINDING ENERGY
BOSON-EXCHANGE MODELS
BOSONS
COMPOSITE MODELS
DEEP INELASTIC SCATTERING
ELEMENTARY PARTICLES
ENERGY
FUNCTIONS
HADRONS
HAMILTONIANS
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MESONS
OBE MODEL
OPE MODEL
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTON MODEL
PERIPHERAL MODELS
PIONS
PSEUDOSCALAR MESONS
QUANTUM OPERATORS
QUARK MODEL
SCATTERING
STRUCTURE FUNCTIONS