Wed·Feb 18, 2015Wednesday·February 18, 2015

1. 01*

   Accurate nuclear radii and binding energies from a chiral interaction

   A. Ekström🇳🇴 · G. R. Jansen🇺🇸 · K. A. Wendt🇺🇸 · G. Hagen🇺🇸 · T. Papenbrock🇺🇸 · B. D. Carlsson🇸🇪 · C. Forssén🇸🇪 · M. Hjorth-Jensen🇺🇸 · P. Navrátil🇨🇦 · W. Nazarewicz🇺🇸

   With the goal of developing predictive ab-initio capability for light and medium-mass nuclei, two-nucleon and three-nucleon forces from chiral effective field theory are optimized simultaneously to low-energy nucleon-nucleon scattering data, as well as binding energies and radii of few-nucleon systems and selected isotopes of carbon and oxygen. Coupled-cluster calculations based on this interaction, named NNLO${}_{\mathrm{sat}}$, yield accurate binding energies and radii of nuclei up to ${}^{40}$Ca, and are consistent with the empirical saturation point of symmetric nuclear matter. In addition, the low-lying collective $J^{\pi }=3^{-}$ states in ${}^{16}$O and ${}^{40}$Ca are described accurately, while spectra for selected $p$- and $sd$-shell nuclei are in reasonable agreement with experiment.

   ↳ nucl-thnucl-exPRC(2015)·541 citations
2. 02*

   Light-Heavy Ion Collisions: A window into pre-equilibrium QCD dynamics?

   Paul Romatschke🇺🇸

   Relativistic collisions of light on heavy ions (p+Au at sqrt(s)=7.7 GeV, p+Au, d+Au,3He+Au at sqrt(s)=62.4 GeV and 200 GeV and p+Pb, 3He+Pb at sqrt(s)=5.02 TeV) are simulated using "superSONIC", a model that includes pre-equilibrium flow, viscous hydrodynamics and a hadronic cascade afterburner. Even though these systems have strong gradients and only consist of at most a few tens of charged particles per unit rapidity, one finds evidence that a hydrodynamic description applies to these systems. Based on these simulations, the presence of a triangular flow component in d+Au collisions at sqrt(s)=200 GeV is predicted to be similar in magnitude to that found in 3He+Au collisions. Furthermore, the v3(p_T) ratio of 3He+Au to d+Au is found to be sensitive to the presence of pre-equilibrium flow. This would imply an experimentally accessible window into pre-equilibrium QCD dynamics using light-heavy ion collisions.

   ↳ nucl-thhep-phnucl-exEPJC(2015)·125 citations
3. 03*

   Core excitation in three-body nuclear reactions: Improved nucleon-core potential

   A. Deltuva🇱🇹

   Three-body nuclear reactions in two-nucleon plus core systems are described in the framework of exact scattering equations including the core excitation. A nucleon-core optical potential is constructed that can be easily adjusted to the reference potential and thereby to the experimental two-body data, if available. This constitutes an important improvement over the simple deformation of the potential used previously that violated the original fit to the data. Predictions for elastic, inelastic, and transfer reactions involving ${}^{10}Be$ and ${}^{24}Mg$ nuclear cores are obtained. The new optical potential leads to a moderate increase of cross sections.

   ↳ nucl-thnucl-exPRC(2015)·16 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.