Nuclear Theory·nucl-th

Friday·April 8, 2016

6 papers—2 primary·4 cross-listed

01
[Submitted on 7 Apr 2016]
Couplings between the $ρ$ and $D$ - and $D^{*}$ -mesons
Bruno El-Bennich🇧🇷 · M. Ali Paracha🇵🇰 · Craig D. Roberts🇺🇸 · Eduardo Rojas🇨🇴
We compute couplings between the $ρ$ -meson and $D$ - and $D^{*}$ -mesons - $D^{(*)} ρ D^{(*)}$ - that are relevant to phenomenological meson-exchange models used to analyse nucleon- $D$ -meson scattering and explore the possibility of exotic charmed nuclei. Our framework is built from elements constrained by Dyson-Schwinger equation studies in QCD, and therefore expresses a consistent, simultaneous description of light- and heavy-quarks and the states they constitute, We find that all interactions, including the three independent $D^{*} ρ D^{*}$ couplings, differ markedly amongst themselves in strength and also in range, as measured by their evolution with $ρ$ -meson virtuality. As a consequence, it appears that no single coupling strength or parametrization can realistically be employed in the study of interactions between $D^{(*)}$ -mesons and matter.
Comments:
8 pages, two figures, published version with some additional footnotes and references
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Experiment (hep-ex); High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
arXiv:
1604.01861 [pdf]
PRD(2017)·21 citations
02
[Submitted on 7 Apr 2016]
Constraining the equation of state of nuclear matter from competition of fusion and quasi-fission in the reactions leading to production of the superheavy elements
Martin Veselsky · Jozef Klimo · Yu-Gang Ma · Georgios A. Souliotis
The mechanism of fusion hindrance, an effect preventing the synthesis of superheavy elements in the reactions of cold and hot fusion, is investigated using the Boltzmann-Uehling-Uhlenbeck equation, where Coulomb interaction is introduced. A strong sensitivity is observed both to the modulus of incompressibility of symmetric nuclear matter, controlling the competition of surface tension and Coulomb repulsion, and to the stiffness of the density-dependence of symmetry energy, influencing the formation of the neck prior to scission. The experimental fusion probabilities were for the first time used to derive constraints on the nuclear equation of state. A strict constraint on the modulus of incompressibility of nuclear matter $K_{0} = 240 - 260$ MeV is obtained while the stiff density-dependences of the symmetry energy ( $γ > 1.$ ) are rejected.
Comments:
9 pages, 4 figures
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
1604.01963 [pdf]
PRC(2016)·12 citations

Affiliations

first authorsco-authorsvia INSPIRE

Couplings between the ρ and D- and D∗-mesons

Constraining the equation of state of nuclear matter from competition of fusion and quasi-fission in the reactions leading to production of the superheavy elements

Affiliations

Couplings between the $ρ$ and $D$ - and $D^{*}$ -mesons