2016/04/18 by Lisa Olbrich, L. Olbrich, M. Zétényi +2
Mathematics · Physics and Astronomy · #Baryon #Diquark #Flavor #Geometry #High-Energy Particle Collisions Research #Lagrangian #Mathematics #Octet #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quark #Quark model #Spin (aerodynamics) #Symmetry (geometry) #Theoretical physics #hep-ph #nucl-th
paper · pdf · doi:10.1088/1742-6596/742/1/012018
Based on the presentation given at FAIRNESS 2016, Workshop for young scientists with research interests focused on physics at FAIR, 14-19 February 2016 Garmisch-Partenkirchen, Germany. 5 pages
arxiv created 2016/04/18 · openalex publication_date 2016/08/01 · arxiv updated 2016/11/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study three-flavor octet baryons by using the so-called extended Linear Sigma Model (eLSM). Within a quark-diquark picture, the requirement of a mirror assignment naturally leads to the consideration of four spin- ½ baryon multiplets. A reduction of the Lagrangian to the two-flavor case leaves four doublets of nucleonic states which mix to form the experimentally observed states N (939), N (1440), N (1535) and N (1650). We determine the parameters of the nucleonic part of the Lagrangian from a fit to masses and decay properties of the aforementioned states. By tracing their masses when chiral symmetry is restored, we conclude that the pairs N (939), N (1535) and N (1440), N (1650) form chiral partners.