Nuclear Theory·nucl-th

Thursday·August 29, 2019

8 papers—2 primary·6 cross-listed

01
Comprehensive study of mass modifications of light mesons in nuclear matter in the three-flavor extended Linear Sigma Model
Daiki Suenaga🇨🇳 · Phillip Lakaschus🇩🇪
We present a comprehensive study of mass modifications of scalar, pseudo-scalar, vector, and axial-vector mesons in nuclear matter using the three-flavor extended Linear Sigma Model (eLSM) and the two-flavor Parity Doublet Model (PDM). The meson masses in nuclear matter are determined by calculating the one-loop nucleon corrections to the meson mean fields. As a result, we find all spin- $0$ meson masses except those of the pion, kaon, and the lightest scalar-isoscalar mesons decrease at finite baryon density. For spin- $1$ mesons, masses of all axial-vector mesons decrease in medium, and the density dependences of the $ρ$ and $ω$ meson masses strongly depend on the value of chiral invariant mass ( $M_{0}$ ). Also, our results suggest $M_{0} \approx 0.8 GeV$ is preferable.
nucl-thhep-phPRC(2020)·16 citations
02
To the nature of nuclear force
V.I. Kukulin🇷🇺 · V.N. Pomerantsev🇷🇺 · O.A. Rubtsova🇷🇺 · M.N. Platonova🇷🇺
It has been shown for the first time that $N N$ interaction, at least in some partial waves, can be quantitatively described by the superposition of a long-range one-pion exchange and a short-range mechanism based on the complex pole in the $N N$ potential corresponding to the dibaryon resonance in this partial wave. For the partial waves $^{3} P_{2}$ , $^{1} D_{2}$ , $^{3} F_{3}$ and $^{1} S_{0}$ the parameters of the complex poles that give the best description of the elastic and inelastic phase shifts of $N N$ scattering are very close to the empirical parameters of the corresponding isovector dibaryon resonances detected experimentally. Based on the results obtained, a general conclusion is made about the nature of nuclear force at medium and small internucleon distances.
nucl-thPhys.Atom.Nucl.(2020)·15 citations

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first authorsco-authorsvia INSPIRE

Comprehensive study of mass modifications of light mesons in nuclear matter in the three-flavor extended Linear Sigma Model

To the nature of nuclear force

Affiliations