Wed·Aug 1, 2018Wednesday·August 1, 2018

1. 01*

   Pseudorapidity dependence of particle production and elliptic flow in asymmetric nuclear collisions of $p$$+$Al, $p$$+$Au, $d$$+$Au, and ${}^3$He$+$Au at $\sqrt{s_{{}_{NN}}}=200$ GeV

   A. Adare · C. Aidala · N.N. Ajitanand · Y. Akiba · M. Alfred · V. Andrieux · K. Aoki · N. Apadula · H. Asano · C. Ayuso · B. Azmoun · V. Babintsev and 357 other authors

   Asymmetric nuclear collisions of $p$$+$Al, $p$$+$Au, $d$$+$Au, and ${}^3$He$+$Au at $\sqrt{s_{{}_{NN}}}=200$ GeV provide an excellent laboratory for understanding particle production, as well as exploring interactions among these particles after their initial creation in the collision. We present measurements of charged hadron production $d{N}_{\mathrm{ch}}/d\eta$ in all such collision systems over a broad pseudorapidity range and as a function of collision multiplicity. A simple wounded quark model is remarkably successful at describing the full data set. We also measure the elliptic flow $v_2$ over a similarly broad pseudorapidity range. These measurements provide key constraints on models of particle emission and their translation into flow.

   nucl-exhep-exPRL(2018)·75 citations
2. 02*

   Shells in a Toroidal Nucleus in the Intermediate Mass Region

   Cheuk-Yin Wong🇺🇸 · Andrzej Staszczak🇵🇱

   Attention is fixed on shells in toroidal nuclei in the intermediate mass region using a toroidal single-particle potential. We find that there are toroidal shells in the intermediate mass region with large single-particle energy gaps at various nucleon numbers located at different toroidal deformations characterized by the aspect ratios of toroidal major to minor radius. These toroidal shells provide extra stability at various toroidal deformations. Relative to a toroidal core, Bohr-Mottelson spin-aligning particle-hole excitations may be constructed to occupy the lowest single-particle Routhian energies to lead to toroidal high-spin isomers with different spins. Furthermore, as a nucleon in a toroidal nucleus possesses a vorticity quantum number, toroidal vortex nuclei may be constructed by making particle-hole excitations in which nucleons of one type of vorticity are promoted to populate un-occupied single-particle orbitals of the opposite vorticity. Methods for producing toroidal high-spin isomers and toroidal vortex nuclei are discussed.

   ↳ nucl-thnucl-exPRC(2018)·4 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.