Delta (1232) in nuclei and QCD sum rules
19956 pages
Published in:
- Phys.Rev.C 52 (1995) 1022-1027
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Abstract: (APS)
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 Δ(1232) and a QCD sum rule analysis of both the free and in-medium Δ.- pi nucleon: interaction
- interaction: pi nucleon
- isobar model
- Delta(1232): propagator
- two-point function
- quantum chromodynamics: sum rule
- Delta(1232): mass
- mass: Delta(1232)
- quark: multiple
- quark: condensation
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