https://doi.org/10.1140/epja/s10050-023-01221-2
Regular Article - Theoretical Physics
Scalar field, nucleon structure and relativistic chiral theory for nuclear matter
Univ Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822, 69622, Villeurbanne, France
Received:
14
August
2023
Accepted:
14
December
2023
Published online:
8
January
2024
The work that Peter Schuck and I carried out during the nineties in collaboration with the Lyon and Darmstadt theory groups is summarized. I retrace how our theoretical developments combined with experimental results concerning the in-medium modification of the pion-pion interaction allowed a clarification of the chiral status of the sigma meson introduced in relativistic theories of nuclear matter. This enabled us to build a relativistic chiral theory, now called the chiral confining model of nuclear matter, which includes the effect of the nucleon substructure, namely the response of the nucleon to the nuclear scalar field generating an efficient and natural contribution to the saturation mechanism. Using parameters from a QCD-connected version of the chiral confining model, I describe the relative roles of the chiral scalar field and two-pion (or two-rho) exchange for the in-medium NN attractive interaction and the associated sources of three-body interactions needed for the saturation mechanism.
Dedicated to the memory of Peter Schuck.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
