Quantum fermionic effects explain nearly all effective quadrupole deformation in light/spherical nuclei but less than 10% in heavy deformed nuclei, showing the classical rigid-rotor picture is insufficient for quantitative work.
Nuclear Ground State Observables and QCD Scaling in a Refined Relativistic Point Coupling Model
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abstract
We present results obtained in the calculation of nuclear ground state properties in relativistic Hartree approximation using a Lagrangian whose QCD-scaled coupling constants are all natural (dimensionless and of order 1). Our model consists of four-, six-, and eight-fermion point couplings (contact interactions) together with derivative terms representing, respectively, two-, three-, and four-body forces and the finite ranges of the corresponding mesonic interactions. The coupling constants have been determined in a self-consistent procedure that solves the model equations for representative nuclei simultaneously in a generalized nonlinear least-squares adjustment algorithm. The extracted coupling constants allow us to predict ground state properties of a much larger set of even-even nuclei to good accuracy. The fact that the extracted coupling constants are all natural leads to the conclusion that QCD scaling and chiral symmetry apply to finite nuclei.
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UNVERDICTED 2representative citing papers
Bayesian sampling of ~1M EDF parameter sets combined with subspace-projected CDFT shows that statistical uncertainties bring deformed nuclei 150Nd and 150Sm into agreement with data while near-spherical 136Xe and 136Ba remain outside the predicted bands.
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Quantum effects in the quadrupole rotor picture of ultra-relativistic ion-ion collisions
Quantum fermionic effects explain nearly all effective quadrupole deformation in light/spherical nuclei but less than 10% in heavy deformed nuclei, showing the classical rigid-rotor picture is insufficient for quantitative work.
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Statistical uncertainty quantification for multireference covariant density functional theory
Bayesian sampling of ~1M EDF parameter sets combined with subspace-projected CDFT shows that statistical uncertainties bring deformed nuclei 150Nd and 150Sm into agreement with data while near-spherical 136Xe and 136Ba remain outside the predicted bands.