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Nuclear Theory·nucl-th

Wednesday·May 25, 2022

8 papers—3 primary·5 cross-listed

All8Primary3Cross-lists5
  1. 01

    Effect of shake-up on the rate of a neutrinoless double electronic capture in Er

    F. F. Karpeshin🇷🇺 · M. B. Trzhaskovskaya🇷🇺

    Traditionally double neutrinoless electronic capture is considered as a resonance process. We have fulfilled shake-off probability calculations, leading to ionization of the electron shell, in the case of Er. Allowance for the shake-off removes the requirement of resonance, leading to an increase of the capture rate. The contribution of the new mechanism increases the capture rate by a factor of 5.6 compared to the conventional resonance fluorescence mechanism. It also increases the probability of electron capture from higher shells, which must be foreseen in an experimental study. Moreover, effect of the shake-off can potentially expand the list of candidate nuclei for experiments.

    nucl-thPhys.Atom.Nucl.(2022)·3 citations
  2. 02

    Extended random-phase-approximation study of fragmentation of giant quadrupole resonance in O

    Mitsuru Tohyama

    The damping of isoscalar giant quadrupole resonance in O is studied using extended random-phase-approximation approaches derived from the time-dependent density-matrix theory. It is pointed out that the effects of ground-state correlations bring strong fragmentation of quadrupole strength even if the number of two particle--two hole configurations is strongly limited.

    nucl-thPRC(2022)·0 citations
  3. 03

    Extending a Scaling Equation of State to QCD

    J. I. Kapusta🇺🇸 · T. Welle🇺🇸

    Whether Quantum Chromodynamics (QCD) exhibits a phase transition at finite temperature and density is an open question. It is important for hydrodynamic modeling of heavy ion collisions and neutron star mergers. Lattice QCD simulations have definitively shown that the transition from hadrons to quarks and gluons is a crossover when the baryon chemical potential is zero or small. We combine the parametric scaling equation of state, usually associated with the 3D Ising model, with a background equation of state based on a smooth crossover from hadrons to quarks and gluons. Comparison to experimental data from the Beam Energy Scan II at the Relativistic Heavy Ion Collider or in heavy ion experiments at other accelerators may allow the critical exponents and amplitudes in the scaling equation of state to be determined for QCD if a critical point exists.

    nucl-thPRC(2022)·16 citations

Affiliations

first authorsco-authorsvia INSPIRE