Mon·Sep 11, 2017Monday·September 11, 2017

1. 01*

   Observation of ${}^6$He+$t$ cluster states in ${}^9$Li

   W. H. Ma · J. S. Wang · D. Patel · Y. Y. Yang · J. B. Ma · S. L. Jin · P. Ma · Q. Hu · Z. Bai · M. R. Huang · X. Q. Liu · Y. J. Zhou and 16 other authors

   ${}^6$He+$t$ cluster states of exited ${}^9$Li have been measured by 32.7 MeV/nucleon ${}^9$Li beams bombarding on ${}^{208}$Pb target. Two resonant states are clearly observed with the excitation energies at 9.8 MeV and 12.6 MeV and spin-parity of 3/2${}^{-}$ and 7/2${}^{-}$ respectively. These two states are considered to be members of K${}^{\pi }$=1/2${}^{-}$ band. The spin-parity of them are identified by the method of angular correlation analysis and verified by the continuum discretized coupled channels (CDCC) calculation, which agrees with the prediction of the generator coordinate method (GCM). A monopole matrix element about 4 fm${}^2$ for the 3/2${}^{-}$ state is extracted from the distorted wave Born approximation (DWBA) calculation. These results strongly support the feature of clustering structure of two neutron-rich clusters in the neutron-rich nucleus ${}^9$Li for the first time.

   nucl-exnucl-thPRC(2021)·14 citations
2. 02*

   Quarkonium production in proton-proton collisions with ALICE at the LHC

   Philippe Rosnet (for the ALICE Collaboration)🇫🇷

   ALICE at the LHC has a unique potential to study proton-proton collisions with the goal to probe Quantum ChromoDynamics (QCD). The apparatus was designed to reconstruct particles over a large range in transverse momentum and rapidity. In particular, quarkonia are very interesting probes of QCD, because their production mechanisms are governed by both perturbative and non-perturbative QCD processes. In ALICE, quarkonia are reconstructed via their dilepton decay channel down to zero transverse momentum. This contribution gives a short overview of quarkonium production results in proton-proton collisions with ALICE and a comparison to other experimental results and to theoretical models.

   ↳ hep-exnucl-exPoS(2018)·2 citations
3. 03*

   Structure of the lightest tin isotopes

   T. D. Morris🇺🇸 · J. Simonis🇩🇪 · S. R. Stroberg🇨🇦 · C. Stumpf · G. Hagen🇺🇸 · J. D. Holt🇨🇦 · G. R. Jansen🇺🇸 · T. Papenbrock🇺🇸 · R. Roth🇩🇪 · A. Schwenk🇩🇪

   We link the structure of nuclei around ${}^{100}$Sn, the heaviest doubly magic nucleus with equal neutron and proton numbers ($N=Z=50$), to nucleon-nucleon ($NN$) and three-nucleon ($NNN$) forces constrained by data of few-nucleon systems. Our results indicate that ${}^{100}$Sn is doubly magic, and we predict its quadrupole collectivity. We present precise computations of ${}^{101}$Sn based on three-particle--two-hole excitations of ${}^{100}$Sn, and reproduce the small splitting between the lowest $J^{\pi }=7/2^{+}$ and $5/2^{+}$ states. Our results are consistent with the sparse available data.

   ↳ nucl-thnucl-exPRL(2018)·248 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.