Correlation functions of hadron currents in the QCD vacuum calculated in lattice QCD

Journal Article · Fri Oct 01 00:00:00 EDT 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.48.3340· OSTI ID:6216912

Chu, M ^[1]; Grandy, J M ^[2]; Huang, S ^[3]; Negele, J W ^[4]

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1. W.K. Kellogg Radiation Laboratory, California Institute of Technology, 106-38 Pasadena, California 91125 (United States)
2. T-8 Group, MS B-285, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. Department of Physics, FM-15, University of Washington, Seattle, Washington 98195 (United States)
4. Center for Theoretical Physics, Laboratory for Nuclear Science Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

Point-to-point vacuum correlation functions for spatially separated hadron currents are calculated in quenched lattice QCD on a 16[sup 3][times]24 lattice with 6/[ital g][sup 2]=5.7. The lattice data are analyzed in terms of dispersion relations, which enable us to extract physical information from small distances where asymptotic freedom is apparent to large distances where the hadronic resonances dominate. In the pseudoscalar, vector, and axial vector channels where experimental data or phenomenological information are available, semiquantitative agreement is obtained. In the nucleon and [Delta] channels, where no experimental data exist, our lattice data complement experiments. Comparison with approximations based on sum rules and interacting instantons are made, and technical details of the lattice calculation are described.

• DOE Contract Number: AC02-76ER03069; FG06-88ER40427
• OSTI ID: 6216912
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 48:7; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
LATTICE FIELD THEORY
VACUUM STATES
QUANTUM CHROMODYNAMICS
CORRELATION FUNCTIONS
COMPUTERIZED SIMULATION
DISPERSION RELATIONS
EXPERIMENTAL DATA
INSTANTONS
SUM RULES
DATA
EQUATIONS
FIELD THEORIES
FUNCTIONS
INFORMATION
NUMERICAL DATA
QUANTUM FIELD THEORY
QUASI PARTICLES
SIMULATION
662230* - Quantum Chromodynamics- (1992-)