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Nuclear Theory·nucl-th

Monday·June 5, 2017

3 papers—3 primary·0 cross-listed

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  1. 01

    [Submitted on 1 Jun 2017]

    Critical point in the phase diagram of primordial quark-gluon matter from black hole physics

    Renato Critelli (1)🇧🇷 · Jorge Noronha (1)🇧🇷 · Jacquelyn Noronha-Hostler (2,3)🇺🇸 · Israel Portillo (3)🇺🇸 · Claudia Ratti (3)🇺🇸 · Romulo Rougemont (4) ((1) Sao Paulo U., (2) Rutgers U., (3) Houston U., (4) IIP, Brazil)🇧🇷

    Strongly interacting matter undergoes a crossover phase transition at high temperatures K and zero net-baryon density. A fundamental question in the theory of strong interactions, Quantum Chromodynamics (QCD), is whether a hot and dense system of quarks and gluons displays critical phenomena when doped with more quarks than antiquarks, where net-baryon number fluctuations diverge. Recent lattice QCD work indicates that such a critical point can only occur in the baryon dense regime of the theory, which defies a description from first principles calculations. Here we use the holographic gauge/gravity correspondence to map the fluctuations of baryon charge in the dense quark-gluon liquid onto a numerically tractable gravitational problem involving the charge fluctuations of holographic black holes. This approach quantitatively reproduces ab initio results for the lowest order moments of the baryon fluctuations and makes predictions for the higher order baryon susceptibilities and also for the location of the critical point, which is found to be within the reach of heavy ion collision experiments.

    Comments:
    23 pages, 16 figures, accepted for publication in Physical Review D (v3: updated information on affiliations and grants)
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1706.00455 [pdf]
    PRD(2017)·194 citations
  2. 02

    [Submitted on 2 Jun 2017]

    Localisation and dimensionless studies in nuclei and many-body systems

    J.-P. Ebran · E. Khan

    Dimensionless ratios characterizing many-body systems are a powerful tool to reveal the main universal quantities involved. The recently-introduced localisation parameter allow to study the occurrence of crystal, clusterisation, and quantum liquid states in many-body systems such as nuclei. Its concomitant use with other dimensionless quantities such as the quantality, allows to pinpoint fundamental lengthscales and dimensionless ratios at work in nuclei. Within the present approach, the impact of delocalisation on nuclear saturation is discussed. The transition from a homogeneous to a clusterised state in low density systems is studied. The spin-orbit effect in nuclei and fermionic systems is also reviewed in the light of this analysis. A generalised localisation parameter is derived, showing that the delocalisation properties are not always driven by the quantality. The concepts of quantum fluidity and mobility are finally introduced.

    Comments:
    16 pages, 8 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1706.00584 [pdf]
    0 citations
  3. 03

    [Submitted on 2 Jun 2017]

    Perturbation Theory of Nuclear Matter with a Microscopic Effective Interaction

    Omar Benhar · Alessandro Lovato

    An updated and improved version of the effective interaction based on the Argonne\textendash Urbana nuclear Hamiltonian\textemdash derived using the formalism of Correlated Basis Functions (CBF) and the cluster expansion technique\textemdash is employed to obtain a number of properties of cold nuclear matter at arbitrary neutron excess within the formalism of many-body perturbation theory. The numerical results\textemdash including the ground-state energy per nucleon, the symmetry energy, the pressure, the compressibility, and the single-particle spectrum\textemdash are discussed in the context of the available empirical information, obtained from measured nuclear properties and heavy-ion collisions.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1706.00760 [pdf]
    PRC(2017)·21 citations

Affiliations

first authorsco-authorsvia INSPIRE