Baryons within an effective chiral model with three flavours

• Applicant: Professor Dr. Dirk H. Rischke
• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
• Term: from 2014 to 2019
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 262113216

The aim of this project is to construct a simple, yet reliable effective model of hadronic interactions, which fulfills the basic requirements of the underlying QCD Lagrangian (chiral symmetry and dilatation invariance) and which comprehensively describes the vacuum phenomenology of mesons and baryons up to about 2 GeV in mass. To this end, we will extend the so-called extended Linear Sigma Model (eLSM) in the mesonic sector by including the light scalar mesons below 1 GeV in mass and, most importantly, in the baryon sector by including non-strange and strange baryon resonances with spin J=1/2 and J=3/2. Such an approach offers a solid theoretical basis to describe many phenomena of low-energy hadron physics in the mesonic and the baryonic sectors within a unique framework. Then, we apply this improved version of the eLSM to study elementary hadronic reactions of the form Nucleon + Nucleon into Nucleon + Nucleon + X, where X denotes a meson or a photon, and Nucleon + Photon into Nucleon + X as well as similar reactions with open strangeness. These investigations provide vital heoretical input and support for many experiments which focus their attention on studying these reactions.

• DFG Programme: Research Grants
• Participating Person: Professor Dr. Francesco Giacosa