Sea-quark distributions in the pion

Journal Article · Fri May 01 04:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.3061· OSTI ID:7106375

Hwang, W P ^[1]; Speth, J ^[2]

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1. Department of Physics, National Taiwan University, Taipei, Taiwan 10764 (Taiwan, Province of China) Institut fuer Kernphysik der Kernforschungsanlage Juelich, D-5170 Juelich (Germany)
2. Institut fuer Kernphysik der Kernforschungsanlage Juelich, D-5170 Juelich (Germany)

Using Sullivan processes with {rho}{pi}{pi}, {ital K}{sup *+}{ital {bar K}} {pi}, and {ital {bar K}} {sup *0}{ital K+}{pi} vertices, we describe how the sea-quark distributions of a pion may be generated in a quantitative manner. The input valence-quark distributions are obtained using the leading Fock component of the light-cone wave function, which is in accord with results obtained from the QCD sum rules. The sample numerical results appear to be reasonable as far as the existing Drell-Yan production data are concerned, although the distributions as a function of {ital x} differs slightly from those obtained by imposing counting rules for {ital x}{r arrow}0 and {ital x}{r arrow}1. Our results lend additional support toward the conjecture of Hwang, Speth, and Brown that the sea distributions of a hadron, at low and moderate {ital Q}{sup 2} (at least up to a few GeV{sup 2}), may be attributed primarily to generalized Sullivan processes.

• OSTI ID: 7106375
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 45:9; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662230* -- Quantum Chromodynamics-- (1992-)
662420 -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
COMPOSITE MODELS
DEEP INELASTIC SCATTERING
DRELL MODEL
ELEMENTARY PARTICLES
EQUATIONS
FIELD THEORIES
FORM FACTORS
FUNCTIONS
HADRONS
INELASTIC SCATTERING
INTERACTIONS
KAONS
LAGRANGIAN FUNCTION
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LIGHT CONE
MATHEMATICAL MODELS
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PARTONS
PIONS
PIONS PLUS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
SCATTERING
SPACE-TIME
STRANGE MESONS
STRANGE PARTICLES
STRUCTURE FUNCTIONS
SUM RULES
VALENCE
WAVE FUNCTIONS