Mon·Dec 26, 2016Monday·December 26, 2016

1. 01*

   Implications of Missing Resonances in Heavy Ions Collisions

   Jacquelyn Noronha-Hostler🇺🇸

   Between 2004 until today many new resonances in the QCD spectrum have been added by the Particle Data Group. However, it is still possible that there are further states that have yet to be measured, as predicted by Lattice QCD calculations and Quark Models. In this paper I review how these missing states would influence the field of heavy-ion collisions. Additionally, the quantum numbers that characterize these missing states are also discussed.

   ↳ nucl-thhep-phnucl-ex5 citations
2. 02*

   The Heavy Photon Search beamline and its performance

   N. Baltzell🇺🇸 · H. Egiyan🇺🇸 · M. Ehrhart🇺🇸 · C. Field🇺🇸 · A. Freyberger🇺🇸 · F.-X. Girod🇺🇸 · M. Holtrop🇺🇸 · J. Jaros🇺🇸 · G. Kalicy🇺🇸 · T. Maruyama🇺🇸 · B. McKinnon🇬🇧 · K. Moffeit🇺🇸 and 9 other authors

   The Heavy Photon Search (HPS) is an experiment to search for a hidden sector photon, aka a heavy photon or dark photon, in fixed target electroproduction at the Thomas Jefferson National Accelerator Facility (JLab). The HPS experiment searches for the e${}^{+}$e${}^{-}$ decay of the heavy photon with bump hunt and detached vertex strategies using a compact, large acceptance forward spectrometer, consisting of a silicon microstrip detector (SVT) for tracking and vertexing, and a PbWO${}_4$ electromagnetic calorimeter for energy measurement and fast triggering. To achieve large acceptance and good vertexing resolution, the first layer of silicon detectors is placed just 10 cm downstream of the target with the sensor edges only 500 $\mu$m above and below the beam. Placing the SVT in such close proximity to the beam puts stringent requirements on the beam profile and beam position stability. As part of an approved engineering run, HPS took data in 2015 and 2016 at 1.05 GeV and 2.3 GeV beam energies, respectively. This paper describes the beam line and its performance during that data taking.

   ↳ physics.ins-dethep-exnucl-exNucl.Instrum.Meth.A(2017)·22 citations
3. 03*

   Boltzmann-Langevin Approach to Pre-equilibrium Correlations in Nuclear Collisions

   Sean Gavin🇺🇸 · George Moschelli🇺🇸 · Christopher Zin🇺🇸

   Correlations born before the onset of hydrodynamic flow can leave observable traces on the final state particles. Measurement of these correlations can yield important information on the isotropization and thermalization process. Starting from a Boltzmann-like kinetic theory in the presence of dynamic Langevin noise, we derive a new partial differential equation for the two-particle correlation function that respects the microscopic conservation laws. We illustrate how this equation can be used to study the effect of thermalization on long range correlations.

   ↳ nucl-thhep-phnucl-exPRC(2017)·19 citations
4. 04*

   Heavy-flavor production and medium properties in high-energy nuclear collisions - What next?

   G. Aarts🇬🇧 · J. Aichelin🇫🇷 · C. Allton🇬🇧 · R. Arnaldi🇮🇹 · S. A. Bass🇺🇸 · C. Bedda🇳🇱 · N. Brambilla🇩🇪 · E. Bratkovskaya🇩🇪 · P. Braun-Munzinger🇩🇪 · G. E. Bruno🇮🇹 · T. Dahms🇩🇪 · S. K. Das🇮🇹 and 37 other authors

   Open and hidden heavy-flavor physics in high-energy nuclear collisions are entering a new and exciting stage towards reaching a clearer understanding of the new experimental results with the possibility to link them directly to the advancement in lattice Quantum Chromo-dynamics (QCD). Recent results from experiments and theoretical developments regarding open and hidden heavy-flavor dynamics have been debated at the Lorentz Workshop "Tomography of the quark-gluon plasma with heavy quarks}, which was held in October 2016 in Leiden, the Netherlands. In this contribution, we summarize identified common understandings and developed strategies for the upcoming five years, which aim at achieving a profound knowledge of the dynamical properties of the quark-gluon plasma.

   ↳ nucl-thhep-lathep-phnucl-exEPJA(2017)·122 citations
5. 05*

   Production of ${\Lambda }_c^{+}$ hypernuclei in antiproton - nucleus collisions

   R. Shyam🇮🇳 · K. Tsushima🇧🇷

   We investigate the production of charm-baryon hypernucleus ${}_{{\Lambda }_c^{+}}^{16}$O in the antiproton - ${}^{16}$O collisions within a fully covariant model that is based on an effective Lagrangian approach. The explicit ${\bar{\Lambda }}_c^{-}{\Lambda }_c^{+}$ production vertex is described by the $t$-channel $D^0$ and $D^{\ast 0}$ meson-exchanges in the initial collision of the incident antiproton with one of the protons of the target nucleus. The ${\Lambda }_c^{+}$ bound state spinors as well as the self-energies of the exchanged mesons employed in our calculations are derived from the quark-meson coupling model. The parameters of various vertices are taken to be the same as those used in our previous study of the elementary $\bar{p}+p\to {\bar{\Lambda }}_c^{-}+{\Lambda }_c^{+}$ reaction. We find that for antiproton beam momenta of interest to the $\bar{P}ANDA$ experiment, the 0${}^{\circ }$ differential cross sections for the formation of ${}_{{\Lambda }_c^{+}}^{16}$O hypernuclear states with simple particle-hole configurations, have magnitudes in the range of a few $\mu$b/sr.

   ↳ nucl-thhep-exhep-phnucl-exPLB(2017)·21 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.