QCD sum rules for nucleons in nuclear matter

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.46.1507· OSTI ID:6967128

Furnstahl, R J ^[1]; Griegel, D K ^[2]; Cohen, T D ^[3]

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1. Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)
2. Department of Physics and Nuclear Theory Center, Indiana University, Bloomington, Indiana 47405 (United States)
3. Department of Physics and Center for Theoretical Physics, University of Maryland, College Park, Maryland 20742 (United States)

The self-energies of quasinucleon states in nuclear matter are studied using QCD sum-rule methods. A correlator of nucleon interpolating fields, evaluated in the finite-density ground state, is calculated using both an operator product expansion and a dispersion relation with a spectral ansatz. This approach relates the nucleon spectral properties (such as the quasinucleon self-energies) to matrix elements of QCD composite operators (condensates). With increasing nucleon density, large changes in Lorentz scalar and vector self-energies arise naturally; the self-energies are found to be comparable to those suggested by relativistic nuclear physics phenomenology. The most important phenomenological inputs are the baryon density and the value of the nucleon [sigma] term divided by the average current mass of the light quarks. However, the successful comparison to relativistic phenomenology is sensitive to assumptions made about the density dependence of certain four-quark condensates.

• DOE Contract Number: FG02-87ER40365; FG05-87ER40322
• OSTI ID: 6967128
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 46:4; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

662230* -- Quantum Chromodynamics-- (1992-)
663110 -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
DENSITY
ELEMENTARY PARTICLES
ENERGY
EQUATIONS
FERMIONS
FIELD OPERATORS
FIELD THEORIES
HADRONS
MATHEMATICAL OPERATORS
MATRIX ELEMENTS
MATTER
NUCLEAR MATTER
NUCLEONS
PHYSICAL PROPERTIES
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUANTUM OPERATORS
QUARKS
SELF-ENERGY
SUM RULES