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Nuclear Theory·nucl-th

Thursday·January 5, 2023

2 papers—1 primary·1 cross-listed

All2Primary1Cross-lists1
  1. 01

    [Submitted on 4 Jan 2023]

    The Langevin approach for fission of heavy and super-heavy nuclei

    F. A. Ivanyuk · S. V. Radionov · C. Ishizuka · S. Chiba

    In this contribution, we present the main relations of the Langevin approach to the description of fission or fusion-fission reactions. The results of Langevin calculations are shown for the mass distributions of fission fragments of super-heavy elements and used for the investigation of memory effects in nuclear fission.

    Comments:
    10 pages, 4 figures, accepted for publication in APPB. arXiv admin note: text overlap with arXiv:1911.09282
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2301.01500 [pdf]
    Acta Phys.Polon.Supp.(2023)·0 citations
  2. 02

    [Submitted on 4 Jan 2023] (cross-list from hep-ph)

    Challenges to the Good-Walker paradigm in coherent and incoherent photoproduction

    Spencer R. Klein🇺🇸

    High-energy vector meson photoproduction is an important tool for studying the partonic structure of matter at low Bjorken. In the Good-Walker (GW) paradigm, the cross-section for coherent production of vector mesons or other final states, depends the average transverse distribution of gluons, while the incoherent cross-section depends on fluctuations in the nuclear structure, due to variations in nucleon positions, and/or gluonic hot spots. However, predictions of the the GW paradigm seemingly conflict with data from multiple experiments which observe coherent production of vector mesons accompanied by nuclear excitation, or in peripheral relativistic heavy-ion collisions. These data are consistent with a simpler, semi-classical approach. We will discuss this contradiction and explore how and why GW fails. We will also contrast the significant differences in incoherent photoproduction on Au and Pb targets in the GW approach with the much smaller expected differences in their low gluon content.

    Comments:
    7 pages; to be submitted for publication; comments are welcome
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2301.01408 [pdf]
    PRC(2023)·18 citations

Affiliations

first authorsco-authorsvia INSPIRE