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Nuclear Theory·nucl-th

Thursday·January 18, 2024

7 papers—3 primary·4 cross-listed

All7Primary3Cross-lists4
  1. 04

    [Submitted on 16 Jan 2024] (cross-list from hep-lat)

    Searching for the QCD critical point using Lee-Yang edge singularities

    D. A. Clarke · P. Dimopoulos · F. Di Renzo · J. Goswami · C. Schmidt · S. Singh · K. Zambello

    Using QCD calculations at physical quark mass and purely imaginary baryon chemical potential, we locate Lee-Yang edge singularities in the complex chemical potential plane. These singularities have been obtained by the multi-point Padé approach applied to the net baryon number density. We recently showed that singularities extracted with this approach are consistent with universal scaling near the Roberge-Weiss transition. Here we study the universal scaling of these singularities in the vicinity of the QCD critical endpoint. Making use of an appropriate scaling ansatz, we extrapolate these singularities on and lattices towards the real axis to estimate the position of a possible QCD critical point. We find an approach toward the real axis with decreasing temperature. We compare this estimate with a HotQCD estimate obtained from poles of a [4,4]-Padé resummation of the eighth-order Taylor expansion of the QCD pressure.

    Comments:
    8 pages, 1 figure, presented at the 40th International Symposium on Lattice Field Theory
    Subjects:
    High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    2401.08820 [pdf]
    PoS(2024)·13 citations
  2. 05

    [Submitted on 17 Jan 2024] (cross-list from hep-ph)

    Mass suppression effect in QCD radiation and hadron angular distribution in jet

    Chuan-Hui Jiang🇨🇳 · Hai Tao Li🇨🇳 · Shi-Yuan Li🇨🇳 · Zong-Guo Si🇨🇳

    The finite mass of the heavy quark suppresses the collimated radiations, which is generally referred to as the dead cone effect. In this paper, we study the distribution of hadron multiplicity over the hadron opening angle with respect to the jet axis in various flavors of jets. The corresponding measurement can be the most straightforward and simplest to explore the dynamical evolution of the radiations in the corresponding jet, which can expose the mass effect. We also propose the transverse energy-weighted angular distribution which sheds light on the interplay between perturbative and nonperturbative effects in the radiation. With Monte-Carlo simulations, our calculation shows that the dead cone effect can be clearly seen by taking the ratio between the b jet and the light-quark (inclusive) jet, promising to be measured at the LHC in the future.

    Comments:
    7 pages, 4 figures; published version in CPC
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    2401.09033 [pdf]
    CPC(2024)·3 citations
  3. 06

    [Submitted on 17 Jan 2024] (cross-list from hep-ph)

    Limiting attractors in heavy-ion collisions -- the interplay between bottom-up and hydrodynamic attractors

    Kirill Boguslavski🇦🇹 · Aleksi Kurkela🇳🇴 · Tuomas Lappi🇫🇮 · Florian Lindenbauer🇦🇹 · Jarkko Peuron🇫🇮

    In this contribution to the Quark Matter 2023 proceedings, we study the hydrodynamization process in heavy-ion collisions using QCD kinetic theory and introduce the new concept of limiting attractors. They are defined via an extrapolation of observables to vanishing and infinite couplings. We find that the pressure ratio exhibits both a hydrodynamic and a bottom-up limiting attractor, while the ratios of hard probes transport coefficients and are better described in terms of the new bottom-up limiting attractor.

    Comments:
    4 pages, 2 figures; Quark Matter 2023 Conference Proceeding
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2401.09088 [pdf]
    EPJ Web Conf.(2024)·2 citations
  4. 07

    [Submitted on 17 Jan 2024] (cross-list from hep-th)

    Hydrodynamical duals of the gravitational axial anomaly and the cosmological constant

    R. V. Khakimov🇷🇺 · G. Yu. Prokhorov🇷🇺 · O. V. Teryaev🇷🇺 · V. I. Zakharov🇷🇺

    We construct the hydrodynamic expansion for a rotating and accelerated medium in a curved space-time, and establish a duality between the currents related to the cosmological constant and the acceleration. Then we consider the more general case with a non-zero Weyl tensor, and show the relationship between the current in flat space-time and the gravitational axial anomaly. This generalizes the previous derivation to the case with a non-zero Ricci tensor.

    Comments:
    15 pages
    Subjects:
    High Energy Physics — Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc); Nuclear Theory (nucl-th)
    arXiv:
    2401.09247 [pdf]
    PRD(2024)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE