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Nuclear Theory·nucl-th

Friday·November 16, 2018

10 papers—5 primary·5 cross-listed

All10Primary5Cross-lists5
  1. 01

    [Submitted on 15 Nov 2018]

    Pauli rearrangement potential for a scattering state with the interaction in chiral effective field theory

    M. Kohno

    The Pauli rearrangement potential given by the second-order diagram is evaluated for a nucleon optical model potential (OMP) with matrices of the nucleon-nucleon interaction in chiral effective field theory. The results obtained in nuclear matter are applied for Ca in a local-density approximation. The repulsive effect is of the order of 5MeV at the normal density. The density dependence indicates that the real part of the microscopic OMP becomes shallower in a central region, but is barely affected in a surface area. This improves the overall resemblance of the microscopic OMP to the empirical one.

    Comments:
    6 pages, 9 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1811.06164 [pdf]
    PRC(2018)·8 citations
  2. 02

    [Submitted on 15 Nov 2018]

    Anisotropic flow in the few collisions regime: application to bottomonia

    Nina Kersting🇩🇪 · Nicolas Borghini🇩🇪 · Steffen Feld🇩🇪

    Considering the kinetic Boltzmann equation in the limit of very few collisions, we study the evolution of the phase space distribution of bottomonia interacting with an expanding gas of massless partons. We investigate the scaling of the anisotropic flow coefficients on the initial eccentricities and the inverse Knudsen number, and compute their transverse momentum dependence.

    Comments:
    4 pages, 1 figure, Presented by N.K. at Hot Quarks 2018 - Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions, Texel, The Netherlands, September 7-14 2018, Submitted to MDPI Proceedings. v2: Figure corrected + minor changes
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1811.06195 [pdf]
    MDPI Proc.(2019)·8 citations
  3. 03

    [Submitted on 15 Nov 2018]

    Impact of Magnetic field on neutron star properties

    Tuhin Malik🇮🇳 · Debashree Sen🇮🇳 · T. K. Jha🇮🇳 · Hiranmaya Mishra🇮🇳

    We derive an equation of state for magnetized charge neutral nuclear matter relevant for neutron star structure. The calculations are performed within an effective chiral model based on generalization of sigma model with nonlinear self interactions of the sigma mesons along with vector mesons and a cross-coupling term. The effective chiral model is extended by introducing the contributions of strong magnetic field on the charged particles of the model. The contributions arising from the effects of magnetic field on the Dirac sea of charged baryons are also included. The resulting equation of state for the magnetized dense matter is used to investigate the neutron star properties, like, mass-radius relation and tidal deformability. The dimensionless tidal deformability of NS is found to be , which is consistent with recent observation of GW170817. The maximum mass of neutron star in presence of strong magnetic field is consistent with the observational constraints on mass of neutron star from PSR~ J0348 - 0432 and the radius at mass of the neutron star is within the empirical bounds.

    Comments:
    13 pages including 9 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1811.06258 [pdf]
    1 citation
  4. 04

    [Submitted on 15 Nov 2018]

    Can generalized TOV equations explain neutron star macroscopic properties?

    Clésio E. Mota🇧🇷 · Guilherme Grams🇧🇷 · Débora P. Menezes🇧🇷

    In the quest for describing massive neutron stars with radii compatible with recent expectations, we take a different approach in the present paper and, instead of tuning the equations of state, we use an appropriate parameterization of the TOV equations that result in increasing the maximum mass and decreasing the respective radius and consequently, also the radius of canonical stars.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1811.06445 [pdf]
    5 citations
  5. 05

    [Submitted on 15 Nov 2018]

    The QCD critical point hunt: emergent new ideas and new dynamics

    Yi Yin🇺🇸

    The QCD critical point is a landmark point on the QCD phase diagram, with potential connections to a plethora of deep questions on the properties of thermal nuclear matter. Future heavy-ion collision experiments, in particular, the second phase of beam energy scan (BES-II), will explore the QCD phase diagram with an unprecedented precision and would potentially discover the QCD critical point. In this short review, I discuss and summarize recent new ideas, such as `rapidity scan', and new theoretical developments, in particular in the qualitative characterization and quantitative descriptions of the critical fluctuations in the expanding fireball. Those new ideas and developments together would enhance the prospect of locating the QCD critical point.

    Comments:
    14 pages, 2 figures, comments are welcome
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1811.06519 [pdf]
    30 citations

Affiliations

first authorsco-authorsvia INSPIRE