Constraints on the relativistic mean field of $\Delta$-isobar in nuclear matter

Abstract

The effects of the presence of $\Delta$-isobars in nuclear matter are studied in the framework of relativistic mean-field theory. The existence of stable nuclei at saturation density imposes constraints on the $\Delta$-isobar self-energy and thereby on the mean-field coupling constants of the scalar and vector mesons with $\Delta$-isobars. The range of possible values for the scalar and vector coupling constants of $\Delta$-isobars with respect to the nucleon coupling is investigated and compared to recent predictions of QCD sum-rule calculations.

8 pages, Latex using Elsevier style, 2 PS figures, minor changes in revised version

References in corpus (3)

• Density Dependent Hadron Field Theory
• QCD sum rules for $\Delta$ isobar in nuclear matter
• New QCD Sum Rules for Nucleons in Nuclear Matter

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