{Delta}(1232) in nuclei and QCD sum rules

Journal Article · Tue Aug 01 00:00:00 EDT 1995 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.52.1022· OSTI ID:113006

Johnson, M B ^[1]; Kisslinger, L S ^[2]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)

We show how pion-nucleus scattering data can be used to constrain four-quark in-medium matrix elements, whose uncertainty is currently the most important problem inhibiting the use of QCD sum rules to study hadrons in nuclear matter, a problem related to early-universe phase transitions. We take an important step towards determining the matrix elements by extracting a value for a particular linear combination using the Isobar-Doorway model propagator of the in-medium {Delta}(1232) and a QCD sum rule analysis of both the free and in-medium {Delta}.

• OSTI ID: 113006
• Journal Information: Physical Review, C, Vol. 52, Issue 2; Other Information: PBD: Aug 1995
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
QUANTUM CHROMODYNAMICS
SUM RULES
NUCLEI
DELTA-1232 BARYONS
PION REACTIONS
MATRIX ELEMENTS
NUCLEAR MATTER
PHASE TRANSFORMATIONS
PROPAGATOR