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Nuclear Theory·nucl-th

Monday·January 6, 2025

5 papers—1 primary·4 cross-listed

All5Primary1Cross-lists4
  1. 02

    [Submitted on 2 Jan 2025] (cross-list from hep-ph)

    Forward dijet and vector meson production at the LHC

    C. Royon🇺🇸 · J. Penttala🇺🇸

    We first describe the predictions concerning jet production in the very forward region, especially in the FOCAL kinematic region of the ALICE collaboration at CERN as a test of saturation. We also compare vector meson production cross sections at the LHC in Pb Pb and p Pb collisions with the Balitsky Fadin Kuraev Lipatov and the Balitsky Kovchegov evolution equations and data favor the observation of saturation at the LHC.

    Comments:
    Proceedings of the ICHEP 2024 conference, Prague, Czech Republic, July 17-24 2024
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2501.01521 [pdf]
    PoS(2025)·0 citations
  2. 03

    [Submitted on 3 Jan 2025] (cross-list from hep-ph)

    Heavy quark suppression and anisotropic flow at intermediate momentum

    Juhee Hong🇰🇷

    In an intermediate-momentum regime where mass effects are significant, heavy quark suppression and anisotropic flow are computed to investigate the transition between the collisional and radiative energy loss. Based on the collision kernel for diffusion, elastic scattering and semi-collinear gluon-bremsstrahlung can be consistently incorporated into a Boltzmann equation that involves the heavy quark diffusion coefficient. Using the running coupling constant and the diffusion coefficient constrained by lattice QCD data, the collisional and radiative energy-loss contributions to the and are studied in hydrodynamically expanding thermal media. The evolution of the observables, the bulk flow effect, and the dependence on mass and centrality are discussed in noncentral heavy-ion collisions.

    Comments:
    16 pages, 8 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2501.01600 [pdf]
    PRC(2025)·7 citations
  3. 04

    [Submitted on 3 Jan 2025] (cross-list from hep-ph)

    On the pole trajectory of the subthreshold negative parity nucleon with varying pion masses

    Qu-Zhi Li🇨🇳 · Zhiguang Xiao🇨🇳 · Han-Qing Zheng🇨🇳

    We study the pole trajectory of the recently established subthreshold negative parity nucleon pole, namely the , with varying pion masses, in the scheme of linear model with nucleons using the unitarization method. We find that as the pion mass increases, the pole moves toward the real axis. For larger pion masses, at tree level, the pole falls to a specific point on -channel cut and crosses to the adjacent Riemann sheet defined by the logarithmic channel cut. At one-loop level, the pole does not meet the -cut up to GeV. We also re-examined the pole trajectory and find it in good agreement with Roy equation analysis result.

    Comments:
    15 pages, 6 figures; v3, changed to revtex style; v2 Discussions substantially improved, main conclusion not changed
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    2501.01619 [pdf]
    CPC(2025)·4 citations
  4. 05

    [Submitted on 3 Jan 2025] (cross-list from hep-ph)

    QCD Phase Diagram and Astrophysical Implications

    Kenji Fukushima🇯🇵

    I make a brief review about the QCD phases and the equation of state inferred from the neutron star data. Along the temperature axis at low baryon density, the QCD phase transition is a smooth crossover, and it is a natural extension of our imagination to postulate a similar crossover along the density axis at low temperature. Even without phase transitions, the inferred thermodynamic properties of neutron star matter turn out to be highly nontrivial already at twice of the nuclear saturation density. I also give some discussions about the substantiation of quark matter by means of the gravitational wave signals including the multi-messenger prospect.

    Comments:
    9 pages, 7 figures; some important references omitted due to the page limit added; a proceedings contribution to Aspects of Criticality II, Wroclaw, Poland
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
    arXiv:
    2501.01907 [pdf]
    J.Subatomic Part.Cosmol.(2025)·21 citations

Affiliations

first authorsco-authorsvia INSPIRE