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Nuclear Theory·nucl-th

Wednesday·February 6, 2019

6 papers—4 primary·2 cross-listed

All6Primary4Cross-lists2
  1. 05

    Singularity Free Direct Calculation of Spontaneous Mass Generation

    Ken-Ichi Aoki🇯🇵 · Tamao Kobayashi🇯🇵 · Shin-Ichiro Kumamoto🇯🇵 · Shinnosuke Onai🇯🇵 · Daisuke Sato🇯🇵

    We propose a new iterative method to directly calculate the spontaneous mass generation. It is regarded as a new regularization method resembling the finite volume calculation which assures non-negative fluctuation property at every stage. We work with the Nambu--Jona-Lasinio model and the strong coupling gauge theory where the dynamical chiral symmetry breaking occurs. We are able to conclude the physical mass definitely without encountering any singularity nor recourse to any additional consideration like the free energy comparison. However in special case of the 1st order phase transition, we find that the iterative method has a chance to go wrong.

    ↳ hep-thnucl-thThe Science Reports of Kanazawa Universit…·1 citation
  2. 06

    Neutron oscillations for solving neutron lifetime and dark matter puzzles

    Wanpeng Tan🇺🇸

    A model of (neutron-mirror neutron) oscillations is proposed under the framework of the mirror matter theory with slightly broken mirror symmetry. It resolves the neutron lifetime discrepancy, i.e., the 1% difference in neutron lifetime between measurements from "beam" and "bottle" experiments. In consideration of the early universe evolution, the mass difference is determined to be about eV/c with the mixing strength of about . The picture of how the mirror-to-ordinary matter density ratio is evolved in the early universe into the observed dark-to-baryon matter density ratio of about 5.4 is presented. Reanalysis of previous data and new experiments that can be carried out under current technology are discussed and recommended to test this proposed model. Other consequences of the model on astrophysics and possible oscillations of other neutral particles are discussed as well.

    ↳ physics.gen-phPLB(2019)·37 citations

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