Event calendar file
Ab-initio calculations of eta-nuclear quasi-bound states
Speakers
- Martin SCHÄFER
Primary authors
- Martin SCHÄFER (Nuclear Physics Institute, Rez, CAS; CTU in Prague, Faculty of Nuclear Sciences and Physical Engineering)
Co-authors
- Prof. Avraham GAL (Racah Institute of Physics, The Hebrew University, Jerusalem, Israel)
- Dr. Jiri MARES (Nuclear Physics Institute, Rez, CAS)
- Prof. Eliahu FRIEDMAN (Racah Institute of Physics, The Hebrew University, Jerusalem, Israel)
- Prof. Nir BARNEA (Racah Institute of Physics, The Hebrew University, Jerusalem, Israel)
Files
Abstract content
We report on ongoing studies of in-medium $\eta$ N interactions and $\eta$-nuclear quasi-bound states in few-nucleon systems, accounting self-consistently for the $\eta N$ and $\eta$-nucleus subthreshold dynamics and extending the few-body calculations of $\eta$ quasi-bound states in $^3$He and $^4$He [1,2,3]. Our new ab-initio self-consistent calculations of the lightest $\eta$-nuclear systems, including for the first time $^6_\eta $ Li and $^7_{\eta} $Li, were performed within the Stochastic Variational Method. Input $\eta N$ scattering amplitudes for these calculations were constructed within coupled-channel meson-baryon interaction models that incorporate the $N^\ast(1535)$ resonance. It was found that the $\eta d$ system is not bound in any of the models considered, and $^3_{\eta}$He and $^4_{\eta}$He are likely to be nearly or just bound [1,2,3], while $^6_{\eta} $Li and $^7_{\eta} $Li are bound. The connection between our few-body calculations and optical-model calculations in heavier systems [4,5] will be discussed as well.
[1] N. Barnea, E. Friedman, A. Gal, PLB 747 (2015) 345.
[2] N. Barnea, B. Bazak, E. Friedman, A. Gal, PLB 771 (2017) 297, PLB 775 (2017) 364 (E).
[3] N. Barnea, E. Friedman, A. Gal, NPA 968 (2017) 35.
[4] E. Friedman, A. Gal, J. Mares, PLB 725 (2013) 334.
[5] A. Cieply, E. Friedman, A. Gal, J. Mares, NPA 925 (2014) 126.
