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Nuclear Theory·nucl-th

Monday·November 13, 2017

7 papers—5 primary·2 cross-listed

All7Primary5Cross-lists2
  1. 01

    [Submitted on 10 Nov 2017]

    Facets of Neutrino-Nucleus Interactions

    A.B. Balantekin (Wisconsin U., Madison)🇺🇸

    Different approaches to the calculation of neutrino-nucleus cross sections are summarized. Potential impact of improving the nuclear physics input into neutrino interactions and cross section calculations on uncovering new physics is discussed using the example of reactor anomaly. Importance of a thorough understanding of neutrino interactions in astrophysics and cosmology is highlighted.

    Comments:
    Proceedings of the XXXV Mazurian Lakes Conference on Physics, Piaski, Poland, September 3-9, 2017
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1711.03667 [pdf]
    Acta Phys.Polon.B(2018)·2 citations
  2. 02

    [Submitted on 10 Nov 2017]

    Calculation of Power Spectrum in the Little Bangs

    Golam Sarwar🇮🇳 · Sushant K. Singh🇮🇳 · Jan-e Alam🇮🇳

    The power spectrum of fluctuations in the momentum distributions of particles have been estimated with optical Glauber and Monte-Carlo Glauber initial conditions for relativistic heavy ion collisions. The evaluation procedure adopted in this work is analogous to the one used in the calculation of power spectrum in Cosmic Microwave Background Radiation (CMBR). The power spectrum due to perturbations in the phase space distribution of the particles has also been evaluated. The perturbation in phase space has been evolved through the Boltzmann transport equation in an expanding quark gluon plasma (QGP) background. The expansion of the QGP has been treated within the purview of (3+1) dimensional relativistic hydrodynamics. We observe that the non-equlibrium effects introduced as perturbations in the phase space distributions can be traced from the enhancement of the power spectrum as well as through its variation with temperature which is distinctly different from the case of vanishing perturbation. A relation has been derived between the power spectrum and the flow harmonics.

    Comments:
    25 pages, 26 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1711.03743 [pdf]
    Int.J.Mod.Phys.A(2018)·8 citations
  3. 03

    [Submitted on 10 Nov 2017]

    The rank-one separable interaction kernel for nucleon with scalar propagators

    S. G. Bondarenko · V. V. Burov · S. A. Yurev

    In the paper the covariant kernel of the nucleon-nucleon interaction of particles with scalar propagators is analyzed. The Bethe-Salpeter equation for the T matrix is considered in the rank- one separable kernel. The parameters of the kernel for the specific partial-wave channels explicitly connect with the observables { low energy scattering parameters and phase shifts, deuteron binding energy. Covariant separable kernels forthe partial-wave channels with total angular momentum J = 0 (1S0, 3P0) and J = 1 (3S1 -3D1, 1P1, 3P1) are constructed.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1711.03781 [pdf]
    Phys.Part.Nucl.Lett.(2018)·3 citations
  4. 04

    [Submitted on 9 Nov 2017]

    Anisotropic-hydrodynamics approach to a quark-gluon fluid mixture

    Wojciech Florkowski🇵🇱 · Ewa Maksymiuk🇵🇱 · Radoslaw Ryblewski🇵🇱

    Anisotropic-hydrodynamics framework is used to describe a mixture of quark and gluon fluids. The effects of quantum statistics, finite quark mass, and finite baryon number density are taken into account. The results of anisotropic hydrodynamics are compared with exact solutions of the coupled kinetic equations for quarks and gluons in the relaxation time approximation. The overall very good agreement between the hydrodynamic and kinetic-theory results is found.

    Comments:
    21 pages, 3 figures. arXiv admin note: text overlap with arXiv:1710.07095
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1711.03872 [pdf]
    PRC(2018)·21 citations
  5. 05

    [Submitted on 10 Nov 2017]

    Robustness of third family solutions for hybrid stars against mixed phase effects

    A. Ayriyan🇷🇺 · N.-U. Bastian🇵🇱 · D. Blaschke🇷🇺 · H. Grigorian🇷🇺 · K. Maslov🇷🇺 · D. N. Voskresensky🇷🇺

    We investigate the robustness of third family solutions for hybrid compact stars with a quark matter core that correspond to the occurrence of high-mass twin stars against a softening of the phase transition by means of a construction that mimics the effects of pasta structures in the mixed phase. We consider a class of hybrid equations of state that exploits a relativistic mean-field model for the hadronic as well as for the quark matter phase. We present parametrizations that correspond to branches of high-mass twin star pairs with maximum masses between and having radius differences between 3.2 km and 1.5 km, respectively. When compared to a Maxwell construction with a fixed value of critical pressure the effect of the mixed phase construction consists in the occurrence of a region of pressures around belonging to the coexistence of hadronic and quark matter phases between the onset pressure at and the end of the transition at . The maximum broadening which would still allow mass twin compact stars is found to be for all parametrizations within the present class of models. At least the heavier of the neutron stars of the binary merger GW170817 could have been a member of the third family of hybrid stars.

    Comments:
    8 pages, 8 figures, revised version as published in Phys. Rev. D, references updated
    Subjects:
    Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1711.03926 [pdf]
    PRC(2018)·58 citations

Affiliations

first authorsco-authorsvia INSPIRE