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Nuclear Theory·nucl-th

Wednesday·June 26, 2019

2 papers—2 primary·0 cross-listed

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  1. 01

    Dynamical coupled-channels approach to electroweak meson productions on nucleon and deuteron

    Satoshi X. Nakamura (University of Science and Technology of China)🇨🇳

    I overview our recent activity with the Argonne-Osaka dynamical coupled-channels (DCC) approach that provides a unified description of various electroweak meson productions on single nucleon and nucleus. First I discuss the DCC model of a single nucleon. The DCC model has been developed through a comprehensive analysis of reaction data. The model has been further extended to finite region by analyzing pion electroproduction data, and to neutrino-induced reactions using the PCAC relation. Next I discuss applications of the DCC model to electroweak meson productions on the deuteron. We consider impulse mechanism supplemented by final state interactions (FSI) due to and meson-nucleon rescatterings. Using this model, I discuss FSI corrections needed to extract -neutron reaction observables from , and a novel method to extract scattering length from . I also discuss FSI corrections on the existing neutrino-nucleon pion production data that had been extracted from neutrino-deuteron data.

    nucl-thhep-exhep-phnucl-exAIP Conf.Proc.(2020)·0 citations
  2. 02

    Ab initio Gamow in-medium similarity renormalization group with resonance and continuum

    B. S. Hu🇨🇳 · Q. Wu🇨🇳 · Z. H. Sun🇨🇳 · F. R. Xu🇨🇳

    We have developed a novel ab initio Gamow in-medium similarity renormalization group (Gamow IMSRG) in the complex-energy Berggren framework. The advanced Gamow IMSRG is capable of describing the resonance and nonresonant continuum properties of weakly bound and unbound nuclear many-body systems. As test grounds, carbon and oxygen isotopes have been calculated with chiral two- and three-nucleon forces from the effective field theory. Resonant states observed in the neutron-dripline 24O are well reproduced. The halo structure of the known heaviest Borromean nucleus 22C is clearly seen by calculating the density distribution in which the continuum s channel plays a crucial role. Furthermore, we predict low-lying resonant excited states in 22C. The Gamow IMSRG provides tractable ab initio calculations of weakly bound and unbound open quantum systems.

    nucl-thnucl-exPRC(2019)·42 citations

Affiliations

first authorsco-authorsvia INSPIRE