[1]Title: ${\rm Y}$ and ${\eta }_b$ mass shifts in nuclear matter and the ${}^{12}$C nucleus bound states, [2]Title: ${\rm Y}$ and ${\eta }_b$ mass shifts in nuclear matter and the nucleus bound states

Abstract

[1]Abstract: This is a contribution for the PANIC 2021 Proceedings based on the articles, Eur. Phys. J. A 57, 259 (2021) and the accompanied article $[$arXiv:2109.08636 $[$hep-ph$]]$ (Hadron 2021 contribution). We have estimated for the first time the mass shifts of the ${\rm Y}$ and ${\eta }_b$ mesons in symmetric nuclear matter by an SU(5) flavor symmetric effective Lagrangian approach, as well as the in-medium mass of $B^{\ast }$ meson by the quark-meson coupling (QMC) model. The attractive potentials for the ${\rm Y}$- and ${\eta }_b$-nuclear matter are obtained, and one can expect for these mesons to form nuclear bound states. We have indeed found such nuclear bound states with ${}^{12}$C nucleus, where the results for the ${}^{12}$C nucleus bound state energies are new, and we report here for the first time. [2]Abstract: We estimate for the first time the mass shifts (scalar potentials) in symmetric nuclear matter of the ${\rm Y}$ and ${\eta }_b$ mesons using an effective Lagrangian approach, as well as the in-medium mass of the $B^{\ast }$ meson by the quark-meson coupling model. The attractive potentials of both ${\rm Y}$ and ${\eta }_b$ are expected to be strong enough for these mesons to be bound to the ${}^4$He nucleus, and we have obtained such nuclear bound state energies.

Comments: [1] 5 pages, 3 figures (5 eps figure files, 1 table), contribution for the PANIC 2021 proceedings (September 5 - September 10, 2021), [2] 4 pages, 3 figures (5 eps figure files, 1 table), contribution for the HADRON 2021 proceedings (July 26 - July 31, 2021)