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Nuclear Theory·nucl-th

Tuesday·February 27, 2018

8 papers—5 primary·3 cross-listed

All8Primary5Cross-lists3
  1. 01

    Backbendings of Superdeformed bands in Ar

    Xu-Hui Xiang · Xiao-Tao He

    Experimentally observed superdeformed (SD) rotational bands in Ar and Ar are studied by the cranked shell model (CSM) with the paring correlations treated by a particle-number-conserving (PNC) method. This is the first time the PNC-CSM calculations are performed on the light nuclear mass region around . The experimental kinematic moments of inertia versus rotational frequency are reproduced well. The backbending of the SD band at frequency around MeV in Ar is attributed to the sharp rise of the simultaneous alignments of the neutron and proton pairs and pairs, which is the consequence of the band crossing between the and configuration states. The gentle upbending at the low frequency of the SD band in Ar is mainly effected by the alignments of the neutron pairs and proton pairs. The PNC-CSM calculations show that besides the diagonal parts, the off-diagonal parts of the alignments play an important role in the rotational behavior of the SD bands.

    nucl-thnucl-exCPC(2018)·6 citations
  2. 02

    Auxiliary field diffusion Monte Carlo calculations of light and medium-mass nuclei with local chiral interactions

    D. Lonardoni · S. Gandolfi · J. E. Lynn · C. Petrie · J. Carlson · K. E. Schmidt · A. Schwenk

    Quantum Monte Carlo methods have recently been employed to study properties of nuclei and infinite matter using local chiral effective field theory interactions. In this work, we present a detailed description of the auxiliary field diffusion Monte Carlo algorithm for nuclei in combination with local chiral two- and three-nucleon interactions up to next-to-next-to-leading order. We show results for the binding energy, charge radius, charge form factor, and Coulomb sum rule in nuclei with . Particular attention is devoted to the effect of different operator structures in the three-body force for different cutoffs. The outcomes suggest that local chiral interactions fit to few-body observables give a very good description of the ground-state properties of nuclei up to O, with the exception of one fit for the softer cutoff which predicts overbinding in larger nuclei.

    nucl-thPRC(2018)·116 citations
  3. 03

    Production in Nucleus-Nucleus collisions as a probe of chiral dynamics

    Giorgio Torrieri🇧🇷

    We argue that, because of the peculiar properties of the meson, it is a promising probe of "chiral" dynamics. In particular, we show that a rotating gluon-dominated plasma might lead to an enhanced production of w.r.t. statistical model expectations. The presence of a strong topological susceptibility might give a similar effect. In both cases, unlike the statistical model,we expect a non-trivial dependence on event geometry, such as initial volume and impact parameter. Hence, an observation of ratio depending strongly on impact parameter might be a good indication of chiral effects, either from vorticity or topological phases of QCD

    nucl-thhep-phnucl-exPRC(2018)·2 citations
  4. 04

    Configurational entropy and and mesons production in QCD

    G. Karapetyan🇧🇷

    In the present work the electroproduction for diffractive and mesons by considering AdS/QCD correspondence and Color Glass Condensate (CGC) approximation are studied with respect to the associated dipole cross section, whose parameters are studied and analysed in the framework of the configurational entropy. Our results suggest different quantum states of the nuclear matter, showing that the extremal points of the nuclear configurational entropy is able to reflect a true description of the and mesons production, using current data concerning light quark masses. During the computations parameters, obtained in fitting procedure, coincide to the experimental within 0.1 %.

    nucl-thhep-phPLB(2018)·48 citations
  5. 05

    R-Matrix parametrization for {\gamma} decays to unbound states

    Michael Munch

    R-matrix theory was originally developed to describe nuclear reactions. The framework was further extended to describe {\beta} decay to unbound states. However, at the time writing, no clear description of {\gamma} decays to unbound states exist. Such a description will be presented in this note.

    nucl-th2 citations

Affiliations

first authorsco-authorsvia INSPIRE