Mon·Dec 18, 2023Monday·December 18, 2023

1. 01*

   A modified slicing method with multi-dimensional unfolding to measure hadron-argon cross sections

   Yinrui Liu🇺🇸

   Liquid argon technology is widely used by many previous and current neutrino experiments, and it is also promising for future large-scale neutrino experiments. When detecting neutrinos using liquid argon, many hadrons are involved, which can also interact with argon nuclei. In order to gain a better understanding of the detection processes, and to simulate neutrino events, knowledge of hadron-argon cross sections is needed. This paper describes a new procedure which improves upon the previous work with multi-dimensional unfolding to measure hadron-argon cross sections in a liquid argon time projection chamber. Through a simplified version of simulation, we demonstrate the validity of this procedure.

   nucl-exhep-exphysics.ins-detInstruments(2024)·4 citations
2. 02*

   Direct photon $p_{\mathrm{T}}$ spectra and correlations measured with ALICE

   Carolina Arata🇫🇷

   This contribution discusses the measurements of direct photons in pp and Pb--Pb collisions from the LHC Run 2, as recorded by the ALICE experiment. Specifically, we focus on the isolated photons results obtained at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV. The isolated photons ${\gamma }^{\mathrm{iso}}$ spectra in pp and Pb--Pb collisions are presented together with the nuclear modification factor, that is found to be consistent with unity. The azimuthal correlations of ${\gamma }^{\mathrm{iso}}$ with hadrons in Pb--Pb and the hadron$z_{\mathrm{T}}$ distributions $D(z_{\mathrm{T}})$ are presented, showing a centrality-dependent suppression compared to the pQCD NLO pp reference.

   nucl-exhep-exEPJ Web Conf.(2024)·1 citation
3. 03*

   The effects of pseudorapidity-dependent observables on (3+1)D Bayesian Inference of relativistic heavy-ion collisions

   Chun Shen🇺🇸 · Björn Schenke🇺🇸 · Wenbin Zhao🇺🇸

   This proceeding highlights the effects of pseudorapidity-dependent charged hadron observables $d{N}^{\mathrm{ch}}/d\eta$ and $v_2^{\mathrm{ch}}(\eta )$ in Au+Au collisions at 200 GeV on constraining the initial-state nuclear stopping for the beam remnants and the effective QGP specific shear viscosity in a recent Bayesian inference analysis using an event-by-event (3+1)D hydrodynamics + hadronic transport theoretical framework.

   ↳ nucl-thhep-phnucl-exEPJ Web Conf.(2024)·9 citations
4. 04*

   Electromagnetic probes for critical fluctuations of phase transitions in dense QCD

   Toru Nishimura🇯🇵 · Masakiyo Kitazawa🇯🇵 · Teiji Kunihiro🇯🇵

   We study how the dilepton production rates and electric conductivity are affected by the phase transition to color superconductivity and the QCD critical point. Effects of the soft modes associated with these phase transitions are incorporated through the photon self-energy called the Aslamazov-Larkin, Maki-Thompson, and density-of-states terms, which are responsible for the paraconductivity in metallic superconductors. We show that anomalous enhancements of the production rate in the low energy/momentum region and the conductivity occur around the respective critical points.

   ↳ hep-phnucl-exnucl-thEPJ Web Conf.(2024)·0 citations
5. 05*

   QCD at finite temperature and density: Criticality

   Volodymyr Vovchenko🇺🇸

   We overview recent theoretical developments in the search for QCD critical point at finite temperature and density, including from lattice QCD, effective QCD theories, and proton number cumulants in heavy-ion collisions. We summarize the available constraints and predictions for the critical point location and discuss future challenges and opportunities.

   ↳ nucl-thhep-phnucl-exEPJ Web Conf.(2024)·5 citations
6. 06*

   Structure of single $\Lambda$-hypernuclei with Gogny-type $\Lambda$-nucleon forces

   C.V. Nithish Kumar🇮🇹 · L. M. Robledo🇪🇸 · I. Vidana🇮🇹

   We study the structure of single $\Lambda$-hypernuclei using the Hartree--Fock--Bogoliubov method. Finite range Gogny-type forces are used to describe the nucleon-nucleon and $\Lambda$-nucleon interactions. Three different $\Lambda$-nucleon Gogny forces are built. The unknown parameters of these forces are obtained by fitting the experimental binding energies of the $1s$ $\Lambda$ single-particle state in various hypernuclei using the ``Simulated Annealing Method''. These forces are then used to calculate the binding energies of the other ($1p,1d,1f,1g$) $\Lambda$ single-particle states in the different hypernuclei. The predicted values are found to be in good agreement with the experimental data for the three forces constructed. In addition, we calculate also the root-mean-square radii of ground state $\Lambda$ orbital, as well as several global properties of the hypernuclei considered such as their ground-state Hartree--Fock--Bogoliubov energy, their pairing energy and their quadrupole moment.

   ↳ nucl-thnucl-exEPJA(2024)·2 citations
7. 07*

   Latest ALICE results on charm and beauty hadronisation in hadronic collisions

   Jianhui Zhu (for the ALICE Collaboration)🇨🇳

   The study of heavy-flavour mesons and baryons in hadronic collisions provides unique access to the properties of heavy-quark hadronisation in the presence of large partonic densities, where new mechanisms of hadron formation beyond in-vacuum fragmentation can emerge. Performing these measurements in intervals of charged-particle multiplicities across different collision systems provides sensitivity to understand whether different hadronisation mechanisms are at play in small and large hadronic colliding systems. In this contribution, a selection of the latest charm and beauty production measurements in proton--proton (pp) collisions is presented, which can shed light on the modification of the heavy-quark hadronisation mechanisms with respect to leptonic collisions. New published results of the production of all prompt charm ground states in pp collisions at $\sqrt{s}=13$~TeV, which allowed us to measure the charm fragmentation fractions and the total $\mathrm{c}\bar{\mathrm{c}}$ production cross section at midrapidity, will be shown. The new final measurement of non-prompt (i.e. originating from beauty-hadron decays) ${\mathrm{\Lambda }}_{\mathrm{c}}^{+}$ baryons in the same collisions system will be discussed to provide a quantitative comparison between the hadronisation properties of beauty and charm hadrons. New measurements of ${\mathrm{\Xi }}_{\mathrm{c}}^0$ production as a function of charged-particle multiplicity in pp collisions at $\sqrt{s}=13$~TeV, and of ${\mathrm{\Xi }}_{\mathrm{c}}^0$ production in p--Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$~TeV, will be also presented, shedding further light on the hadronisation of charm-strange baryons in different colliding systems.

   ↳ hep-exnucl-exEPJ Web Conf.(2024)·1 citation

* 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.