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Nuclear Theory·nucl-th

Wednesday·February 13, 2019

7 papers—2 primary·5 cross-listed

All7Primary2Cross-lists5
  1. 01

    [Submitted on 12 Feb 2019]

    Symmetries of Neutrino Physics

    A.B. Balantekin🇺🇸

    In this contribution to the proceedings of a conference honoring the career of Francesco Iachello, two applications of symmetry principles to neutrino physics are described. These applications are the connection between fermion pairing in many-body physics and the neutrino mass as well as collective neutrino oscillations

    Comments:
    7 pages, Proceedings of the conference "SYMMETRIES AND ORDER: Algebraic Methods in Many Body Systems"
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1902.04210 [pdf]
    AIP Conf.Proc.(2019)·0 citations
  2. 02

    [Submitted on 12 Feb 2019]

    Effect of residual many-body forces due to the evolution in the in-medium similarity renormalization group method

    G. Puddu🇮🇹

    In the past few years in-medium similarity renormalization group methods have been introduced and developed. In these methods the Hamiltonian is evolved using a unitary transformation in order to decouple a reference state from the rest of the Hilbert space. The evolution by itself will generate, even if we start from a two-body interaction, many-body forces which are usually neglected. In this work we estimate the effect of these residual many-body forces by comparing results obtained with the Hybrid Multi-determinant method, which keeps the Hamiltonian within the two-body sector, with the corresponding ones obtained with the in-medium similarity renormalization group. Although percentage-wise the effect of neglecting these induced many-body forces is not too large, they can be appreciable depending on the nucleus, the shell model space and the harmonic oscillator frequency.

    Comments:
    accepted version J. of Phys. G
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1902.04261 [pdf]
    J.Phys.G(2019)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE