Fri·May 27, 2016Friday·May 27, 2016

1. 01*

   Enhancement of fusion at near and sub-barrier energies for neutron-rich light nuclei

   Varinderjit Singh🇺🇸 · J. Vadas🇺🇸 · T.K. Steinbach🇺🇸 · B.B. Wiggins🇺🇸 · S. Hudan🇺🇸 · R.T. deSouza Zidu Lin · C.J. Horowitz🇺🇸 · L.T. Baby🇺🇸 · S.A. Kuvin🇺🇸 · Vandana Tripathi · I. Wiedenhover🇺🇸

   Measurement of the fusion cross-section for neutron-rich light nuclei is crucial in ascertaining if fusion of these nuclei occurs in the outer crust of a neutron star. We have therefore measured the fusion excitation function at near-barrier energies for the 19O + 12C system and compared the experimental results with the fusion excitation function of 18O + 12C and 16O + 12C. In the experiment a beam of 19O, produced via the 18O(d,p) reaction, was incident on a 12C target at energies near the Coulomb barrier. Evaporation residues produced in fusion of 18,19O ions with 12C target nuclei were detected with good geometric efficiency and identified by measuring their energy and time-of-flight. A significant enhancement in the fusion probability of 19O ions with a 12C target as compared to 18O ions is observed. The significantly larger cross-sections observed at near barrier energies are not predicted by a static model of fusion for 19O + 12C indicating that dynamics play an important role in the fusion of neutron-rich light nuclei.

   nucl-ex0 citations
2. 02*

   Exclusive vector meson production with a leading neutron in photon - hadron interactions at hadronic colliders

   V.P. Goncalves🇧🇷 · B.D. Moreira🇧🇷 · F.S. Navarra🇧🇷 · D. Spiering🇧🇷

   In this paper we study leading neutron production in photon - hadron interactions which take place in $pp$ and $pA$ collisions at large impact parameters. Using a model that describes the recent leading neutron data at HERA, we consider exclusive vector meson production in association with a leading neutron in $pp/pA$ collisions at RHIC and LHC energies. The total cross sections and rapidity distributions of $\rho$, $\varphi$ and $J/\Psi$ produced together with a leading neutron are computed. Our results indicate that the study of these processes is feasible and that it can be used to improve the understanding of leading neutron processes and of exclusive vector meson production.

   ↳ hep-phhep-exnucl-exnucl-thPRD(2016)·15 citations
3. 03*

   Symmetric cumulants and event-plane correlations in Pb+Pb collisions

   Giuliano Giacalone🇫🇷 · Li Yan🇫🇷 · Jacquelyn Noronha-Hostler🇺🇸 · Jean-Yves Ollitrault🇫🇷

   The ALICE Collaboration has recently measured the correlations between amplitudes of anisotropic flow in different Fourier harmonics, referred to as symmetric cumulants. We derive approximate relations between symmetric cumulants involving $v_4$ and $v_5$ and the event-plane correlations measured by ATLAS. The validity of these relations is tested using event-by-event hydrodynamic calculations. The corresponding results are in better agreement with ALICE data than existing hydrodynamic predictions. We make quantitative predictions for three symmetric cumulants which are not yet measured.

   ↳ nucl-thhep-phnucl-exPRC(2016)·67 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.