Wed·Apr 19, 2017Wednesday·April 19, 2017

1. 01*

   Exploring jet substructure with jet shapes in ALICE

   D. Caffarri (for the ALICE Collaboration)🇨🇭

   The characterization of the jet substructure can give insight into the microscopic nature of the modification induced on high-momentum partons by the Quark-Gluon Plasma that is formed in ultra-relativistic heavy-ion collisions. Jet shapes allow us to study the modification of parton to jet fragmentation and virtuality, probing jet energy redistribution, intra-jet broadening or collimation and possible flavour hierarchy. Results of a selected set of jet shapes will be presented for $\text{mbox}p--Pb$ collisions at $\sqrt{s_{\mathrm{NN}}}=5.02\mathrm{TeV}$ and for $\text{mbox}Pb--Pb$ collisions at $\sqrt{s_{\mathrm{NN}}}=2.76\mathrm{TeV}$. Results are also compared with PYTHIA calculations and models that include in-medium energy loss.

   nucl-exNPA(2017)·8 citations
2. 02*

   Net-baryon fluctuations measured with ALICE at the CERN LHC

   Anar Rustamov (for the ALICE Collaboration)🇦🇿

   First experimental results are presented on event-by-event net-proton fluctuation measurements in Pb- Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV, recorded by the ALICE detector at the CERN LHC. The ALICE detector is well suited for such studies due to its excellent particle identification capabilities and large acceptance, which is crucial for fluctuation analysis. The studies are focussed on second order cumulants, but the analysis technique used is more general and will be applied, in the near future, also to higher order cumulants.

   nucl-exNPA(2017)·42 citations
3. 03*

   Jet modifications in event-by-event hydrodynamically evolving media

   Jacquelyn Noronha-Hostler🇺🇸

   The nearly perfect fluid-like nature of the Quark Gluon Plasma may be understood through two key experimental signatures: collective flow and jet suppression. Event-by-event relativistic viscous hydrodynamics (with an extremely small shear viscosity to entropy density ratio) has been very successful at describing collective flow observables for the last 7 years. More recently, the effects of event-by-event fluctuations have been studied in the context of high $p_T$ particles that lose energy as they pass through the dense Quark Gluon Plasma liquid. In this summary of the corresponding plenary talk at Quark Matter 2017, the recent developments on the effects of event-by-event fluctuations on jet suppression are summarized.

   ↳ nucl-thhep-phnucl-exNPA(2017)·0 citations
4. 04*

   Determination of the density region of the symmetry energy probed by the ${\pi }^{-}/{\pi }^{+}$ ratio

   Gao-Chan Yong🇨🇳 · Yuan Gao🇨🇳 · Gao-Feng Wei🇨🇳 · Ya-Fei Guo🇨🇳 · Wei Zuo🇨🇳

   The studies, from several independent methods, consistently show that ${\pi }^{-}/{\pi }^{+}$ ratio in the ${}^{132}$Sn+${}^{124}$Sn reaction at 300 MeV/nucleon, which is being carried out at Radioactive Isotope Beam Facility (RIBF) in Japan, just probes the symmetry energy around saturation density.

   ↳ nucl-thnucl-exJ.Phys.G(2019)·13 citations
5. 05*

   $p{\Xi }^{-}$ Correlation in Relativistic Heavy Ion Collisions with Nucleon-Hyperon Interaction from Lattice QCD

   Tetsuo Hatsuda🇯🇵 · Kenji Morita🇯🇵 · Akira Ohnishi🇯🇵 · Kenji Sasaki🇯🇵

   On the basis of the $p{\Xi }^{-}$ interaction extracted from (2+1)-flavor lattice QCD simulations at the physical point, the momentum correlation of $p$ and ${\Xi }^{-}$ produced in relativistic heavy ion collisions is evaluated. $C_{\mathrm{SL}}(Q)$ defined by a ratio of the momentum correlations between the systems with different source sizes is shown to be largely enhanced at low momentum due to the strong attraction between $p$ and ${\Xi }^{-}$ in the $I=J=0$ channel. Thus, measuring this ratio at RHIC and LHC and its comparison to the theoretical analysis will give a useful constraint on the $p{\Xi }^{-}$ interaction.

   ↳ nucl-thhep-latnucl-exNPA(2017)·53 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.