Abstract
The interactions between η-meson and nucleons are studied by the unification of the chiral SU(3) model and chiral perturbation theory. The η meson-nucleon interactions for the next-to-leading order terms are derived by expanding the ηN interaction Lagrangian within the chiral perturbation theory. Using the chiral SU(3) model, we calculate the in-medium scalar density of protons and neutrons for different values of temperature T, isospin asymmetry I and nucleonic density ρN. Within the chiral SU(3) model the in-medium properties of nucleons are evaluated in terms of scalar-isoscalar fields σ, and ζ and the scalar-isovector field δ. The scalar densities of nucleons calculated using chiral SU(3) model are used as input in the equation of motion of η mesons obtained from chiral perturbation theory. We solve the equation of motion for sigma term and scattering length aηN = 1.025 fm for different values of asymmetry of the medium. We find an attractive mass-shift of the η meson in nuclear medium and the magnitude of this shift increases with increasing density. Finite isospin asymmetry of the medium causes less drop in the in-medium mass of η mesons. The negative mass-shift indicates the possibility of the formation of η-mesic nuclei.
Highlights
The study of the baryon-meson interactions is a very interesting topic of research in the strong interaction physics, both theoretically and experimentally [1, 2]
The η meson-nucleon interactions for the next-to-leading order terms are derived by expanding the ηN interaction Lagrangian within the chiral perturbation theory
Using the chiral SU(3) model, we calculate the in-medium scalar density of protons ρps and neutrons ρns for different values of temperature T, isospin asymmetry I and nucleonic density ρN
Summary
The study of the baryon-meson interactions is a very interesting topic of research in the strong interaction physics, both theoretically and experimentally [1, 2]. The interactions between η-meson and nucleons are studied by the unification of the chiral SU(3) model and chiral perturbation theory. The η meson-nucleon interactions for the next-to-leading order terms are derived by expanding the ηN interaction Lagrangian within the chiral perturbation theory.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
