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Nuclear Theory·nucl-th

Wednesday·December 13, 2017

8 papers—5 primary·3 cross-listed

All8Primary5Cross-lists3
  1. 01

    Jet-medium interaction and the Gubser flow

    Li Yan🇨🇦 · Sangyong Jeon🇨🇦 · Charles Gale🇨🇦

    We study the effects of expansion and viscous corrections on the hydrodynamical medium response to a high energy jet parton. More specifically, using a semi-analytical Gubser solution to relativistic fluid dynamics, modifications to the formed Mach cone, diffusive wake, and the momentum flow of the medium response along and perpendicular to the jet particle, are analyzed mode-by-mode. This should provide intuition and guidance for analyses of the experimentally measured jet sub-structure in heavy-ion collisions.

    nucl-thhep-phnucl-exPoS(2018)·2 citations
  2. 02

    A new scheme for heavy nuclei: proxy-SU(3)

    D. Bonatsos · R. F. Casten · A. Martinou · I. E. Assimakis · N. Minkov · S. Sarantopoulou · R. B. Cakirli · K. Blaum

    The SU(3) symmetry realized by J. P. Elliott in the sd nuclear shell is destroyed in heavier shells by the strong spin-orbit interaction. However, the SU(3) symmetry has been used for the description of heavy nuclei in terms of bosons in the framework of the Interacting Boson Approximation, as well as in terms of fermions using the pseudo-SU(3) approximation. We introduce a new fermionic approximation, called the proxy-SU(3), and we discuss how some of its novel predictions come out as a consequence of the short range of the nucleon-nucleon interaction and the Pauli principle.

    nucl-thAdv.Nucl.Phys.(2017)·5 citations
  3. 03

    Parameter-independent predictions for nuclear shapes and B(E2) transition rates in the proxy-SU(3) model

    A. Martinou · S. Peroulis · D. Bonatsos · I. E. Assimakis · S. Sarantopoulou · N. Minkov · R. B. Cakirli · R. F. Casten · K. Blaum

    Using a new approximate analytic parameter-free proxy-SU(3) scheme, we make predictions of shape observables for actinides and superheavy elements, namely beta and gamma deformation variables, and compare these with predictions by relativistic and non-relativistic mean-field theories. Furthermore, we make predictions for B(E2) transition rates of deformed nuclei and compare these with existing data and predictions of other theoretical approaches.

    nucl-thAdv.Nucl.Phys.(2017)·1 citation
  4. 04

    Phenomenological Equation of State of Strongly Interacting Matter with First-Order Phase Transitions and Critical Points

    Stefan Typel🇩🇪 · David Blaschke🇵🇱

    An extension of the relativistic density functional approach to the equation of state for strongly interacting matter is suggested which generalizes a recently developed modified excluded-volume mechanism to the case of temperature and density dependent available-volume fractions. A parametrisation of this dependence is presented for which at low temperatures and suprasaturation densities a first-order phase transition is obtained. It changes for increasing temperatures to a crossover transition via a critical endpoint. This provides a benchmark case for studies of the role of such a point in hydrodynamic simulations of ultrarelativistic heavy-ion collisions. The approach is thermodynamically consistent and extendable to finite isospin asymmetries that are relevant for simulations of neutron stars, their mergers and core-collapse supernova explosions.

    nucl-thUniverse(2018)·13 citations
  5. 05

    Aspects of Shape Coexistence in the Geometric Collective Model of Nuclei

    P. E. Georgoudis · A. Leviatan

    We examine the coexistence of spherical and -unstable deformed nuclear shapes, described by an SO(5)-invariant Bohr Hamiltonian, along the critical-line. Calculations are performed in the Algebraic Collective Model by introducing two separate bases, optimized to accommodate simultaneously different forms of dynamics. We demonstrate the need to modify the -dependence of the moments of inertia, in order to obtain an adequate description of such shape-coexistence.

    nucl-thJ.Phys.Conf.Ser.(2018)·4 citations

Affiliations

first authorsco-authorsvia INSPIRE