PaperPanorama
FAQ

Nuclear Theory·nucl-th

Wednesday·August 19, 2020

9 papers—4 primary·5 cross-listed

All9Primary4Cross-lists5
  1. 01

    [Submitted on 17 Aug 2020]

    Study of heavy-flavor jets in a transport approach

    Weiyao Ke🇺🇸 · Xin-Nian Wang🇺🇸 · Wenkai Fan🇺🇸 · Steffen Bass🇺🇸

    Measurements at the RHIC and the LHC have observed flavor dependence of single-hadron suppression, which reveal the role played by quark masses in the parton interactions with the quark-gluon plasma (QGP) medium. In this study, we explore the manifestation of quark mass effect and flavor dependence in jet observables. We approach this study using the LIDO transport model. Both elastic and medium-induced radiative processes are implemented for hard parton evolution in the medium. To guarantee energy-momentum conservation in the model for the study of full jet observables, we also include a component that mimics the energy-momentum transported by medium excitation. We first predict the heavy-jet (B-jet, D-jet) and inclusive-jet nuclear modification factor in central nuclear collisions at both the RHIC and the LHC beam energies. We observe a flavor-dependent jet suppression as a function of jet transverse momentum, which can be tested by future precision measurements of heavy jets. We further investigate a novel observable that considers the angular correlation between two hard objects: a D-meson and a jet, which provides model constraints in addition to those imposed by inclusive measurements.

    Comments:
    5 pages, 2 figures, proceeding of Hard Probes 2020
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2008.07622 [pdf]
    PoS(2021)·8 citations
  2. 02

    [Submitted on 17 Aug 2020]

    Bulk observables at 5.02 TeV using quasiparticle anisotropic hydrodynamics

    Mubarak Alqahtani🇸🇦 · Michael Strickland🇺🇸

    We present comparisons between 3+1D quasiparticle anisotropic hydrodynamics (aHydroQP) predictions for a large set of bulk observables and experimental data collected in 5.02 TeV Pb-Pb collisions. We make aHydroQP predictions for identified hadron spectra, identified hadron average transverse momentum, charged particle multiplicity as a function of pseudorapidity, the kaon-to-pion () and proton-to-pion () ratios, and integrated elliptic flow. We compare to data collected by the ALICE collaboration in 5.02 TeV Pb-Pb collisions. We find that these bulk observables are quite well described by aHydroQP with an assumed initial central temperature of MeV at fm/c and a constant specific shear viscosity of and a peak specific bulk viscosity of . In particular, we find that the momentum dependence of the kaon-to-pion () and proton-to-pion () ratios reported recently by the ALICE collaboration are extremely well described by aHydroQP in the most central collisions.

    Comments:
    8 pages, 5 multipanel figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2008.07657 [pdf]
    EPJC(2021)·43 citations
  3. 03

    [Submitted on 18 Aug 2020]

    Color superconductivity with self-consistent NJL-type model

    Li-Qun Su🇨🇳 · Chao Shi🇨🇳 · Yong-Hui xia🇨🇳 · Hongshi Zong🇨🇳

    In this paper, the NJL-type model is used to investigate the color superconductivity. The four-fermion interactions of the NJL-type model are Fierz-transformed into two different classes, i.e., the quark-antiquark and the quark-quark interaction channels, associated with the chiral symmetry breaking and color superconductivity respectively. We conclude that the weighting factor between quark-antiquark and quark-quark interaction channels has significance on the phase structure when the mean-field approximation is employed, and the baryon number density gives a tight constraint on the weighting factor of quark-antiquark interaction channels. Besides, the susceptibilities show that the color superconducting phase transition is of the second-order and takes place before the chiral crossover transition as quark number density increases. In the end, we study the critical temperatures of the color superconductivity and it agrees with the perturbative result of diquark condensate .

    Comments:
    8 pages, 11 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2008.07678 [pdf]
    PRD(2020)·12 citations
  4. 04

    [Submitted on 18 Aug 2020]

    Relativistic Kelvin circulation theorem for ideal Magnetohydrodynamics

    Jianfei Wang🇨🇳 · Shi Pu🇨🇳

    We have studied the relativistic Kelvin circulation theorem for ideal Magnetohydrodynamics. The relativistic Kelvin circulation theorem is a conservation equation for the called -vorticity. We have briefly reviewed the ideal magnetohydrodynamics in relativistic heavy ion collisions. The highlight of this work is that we have obtained the general expression of relativistic Kelvin circulation theorem for ideal Magnetohydrodynamics. We have also applied the analytic solutions of ideal magnetohydrodynamics in Bjorken flow to check our results. Our main results can also be implemented to relativistic magnetohydrodynamics in relativistic heavy ion collisions.

    Comments:
    Proceedings for CNPC 2019, accepted by NPR
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2008.07789 [pdf]
    Nucl.Phys.Rev.(2020)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE