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Nuclear Theory·nucl-th

Friday·March 15, 2019

8 papers—4 primary·4 cross-listed

All8Primary4Cross-lists4
  1. 01

    All the Fun of the FAIR: Fundamental physics at the Facility for Antiproton and Ion Research

    M. Durante🇮🇹 · P. Indelicato🇫🇷 · B. Jonson🇸🇪 · V. Koch🇺🇸 · K. Langanke🇩🇪 · Ulf-G. Meißner🇩🇪 · E. Nappi🇮🇹 · T. Nilsson🇸🇪 · Th. Stöhlker🇩🇪 · E. Widmann🇦🇹 · M. Wiescher🇺🇸

    The Facility for Antiproton and Ion Research (FAIR) will be the accelerator-based flagship research facility in many basic sciences and their applications in Europe for the coming decades. FAIR will open up unprecedented research opportunities in hadron and nuclear physics, in atomic physics and nuclear astrophysics as well as in applied sciences like materials research, plasma physics and radiation biophysics with applications towards novel medical treatments and space science. FAIR is currently under construction as an international facility at the campus of the GSI Helmholtzzentrum for Heavy-Ion Research in Darmstadt, Germany. While the full science potential of FAIR can only be harvested once the new suite of accelerators and storage rings is completed and operational, some of the experimental detectors and instrumentation are already available and will be used starting in summer 2018 in a dedicated research program at GSI, exploiting also the significantly upgraded GSI accelerator chain. The current manuscript summarizes how FAIR will advance our knowledge in various research fields ranging from a deeper understanding of the fundamental interactions and symmetries in Nature to a better understanding of the evolution of the Universe and the objects within.

    nucl-thhep-exhep-phnucl-ex+1Phys.Scripta(2019)·111 citations
  2. 02

    Symmetry energy at supra-saturation densities via the Gravitational Waves from GW170817

    Hui Tong🇨🇳 · Peng-Wei Zhao🇨🇳 · Jie Meng🇨🇳

    Motivated by the historical detection of gravitational waves from GW170817, the neutron star and the neutron drop, i.e., a certain number of neutrons confined in an external field, are systematically investigated by ab initio calculations as well as the nonrelativistic and relativistic state-of-art density functional theories. Strong correlations are found among the neutron star tidal deformability, the neutron star radius, the root-mean-square radii of neutron drops, and the symmetry energies of nuclear matter at supra-saturation densities. From these correlations and the upper limit on the tidal deformability extracted from GW170817, the neutron star radii, the neutron drop radii, and the symmetry energy at twice saturation density are respectively constrained as km, fm, and MeV.

    nucl-thPRC(2020)·61 citations
  3. 03

    Universal scaling of conserved charge in the stochastic diffusion dynamics

    Shanjin Wu · Huichao Song

    In this paper, we explore the Kibble-Zurek scaling of the conserved charge, using the stachastic diffusion dynamics. After determining the characteristic scales and and properly rescaling the traditional correlation function and cumulant, we construct universal functions for both the two-point correlation function and second-order cumulant of the conserved charge in the critical regime, which are insensitive to the initial temperature and a parameter in the mapping between 3D Ising model and the hot QCD system near the critical point.

    nucl-thCPC(2019)·10 citations
  4. 04

    Hadron transverse momentum distributions of the Tsallis normalized and unnormalized statistics

    A.S. Parvan🇷🇺 · T. Bhattacharyya🇷🇺

    The exact analytical formulas for the transverse momentum distributions of the Bose-Einstein, Fermi-Dirac and Maxwell-Boltzmann statistics of particles with nonzero mass in the framework of the Tsallis normalized and Tsallis unnormalized (also known as Tsallis-1 and Tsallis-2) statistics have been consistently derived. The final exact results were expressed in terms of the series expansions in the integral representation. The zeroth term approximation to both quantum and classical statistics of particles has been introduced. We have revealed that the phenomenological classical Tsallis distribution (widely used in high energy physics) is equal to the distribution of the Tsallis unnormalized statistics in the zeroth term approximation, but the phenomenological quantum Tsallis distributions (introduced by definition on the basis of the generalized entropy of the ideal gas) do not correspond to the distributions of the Tsallis statistics. We have found that in the ranges of the entropic parameter relevant to the processes of high-energy physics ( for Tsallis-1 and for Tsallis-2) the Tsallis statistics is divergent. Therefore, to obtain physical results, we have regularized the Tsallis statistics by introducing an upper cut-off in the series expansion. The exact numerical results for the Bose-Einstein, Fermi-Dirac and Maxwell-Boltzmann statistics of particles in the Tsallis normalized and unnormalized statistics have been obtained. We observed that the exact results of the Tsallis statistics strongly enhanced the production of high- hadrons in comparison with the usual phenomenological Tsallis distribution function at the same values of . The -duality of the Tsallis normalized and unnormalized statistics for the massive particles was studied.

    nucl-thhep-phEPJA(2020)·23 citations

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first authorsco-authorsvia INSPIRE