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Nuclear Theory·nucl-th

Friday·October 2, 2020

8 papers—2 primary·6 cross-listed

All8Primary2Cross-lists6
  1. 01

    [Submitted on 30 Sept 2020]

    Review of the (1405): A curious case of a strange-ness resonance

    Maxim Mai🇺🇸

    During its long-lasting history, the has become a benchmark for our understanding of the hadron dynamics. Starting with its theoretical prediction and later experimental verification, until the most recent debates on the existence of the second broad pole, it emerged as a fruitful research area sparking many theoretical and experimental developments. This review intends to provide the reader with the current status of research on the -resonance, reflecting on historical, experimental and theoretical developments. A common database for experimental results and a comparison of most recent theoretical approaches will be provided in the last two parts of this manuscript.

    Comments:
    Invited contribution to the EPJST. (21 pages, 7 figures)
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    2010.00056 [pdf]
    Eur.Phys.J.ST(2021)·107 citations
  2. 02

    [Submitted on 1 Oct 2020]

    Influence of fast emissions and statistical de-excitation on the isospin transport ratio

    A. Camaiani🇮🇹 · S. Piantelli🇮🇹 · A. Ono🇯🇵 · G. Casini🇮🇹 · B. Borderie🇫🇷 · R. Bougault🇫🇷 · C. Ciampi🇮🇹 · J.A. Duenas🇪🇸 · C. Frosin🇮🇹 · J. D. Frankland🇫🇷 · D. Gruyer🇫🇷 · N. LeNeindre🇫🇷 and 9 other authors

    Isospin transport ratio is a powerful method to estimate the neutron-proton (n-p) equilibration in heavy-ion collisions, and extensively used to obtain information on the asy-stiffness of the nuclear Equation of State. In fact such a ratio is expected to bypass any perturbations introducing a linear transformation of the chosen observable. In particular, it is supposed to overcome contributions due to emission, either of dynamical or statistical nature, from the primary fragments formed during the collisions. In this paper we explore the validity of this assumption, looking at the quasi-projectile n-p ratio () in peripheral and semi-peripheral events for Ca+Ca reactions at 35\amev{}, simulated via the Antisymmetrized Molecular Dynamics transport model, coupled to different statistical decay codes. The statistical de-excitation of the primary fragments introduces a linear transformation at relatively high excitation energies (above 2\amev{}) when the residue approaches the Evaporation Attractor Line, while some effect is produced at lower excitation energies due to the occurrence of some non-linearities. As for fast emissions after the end of the projectile-target interaction it is shown that they introduce a non-linear transformation too.

    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2010.00242 [pdf]
    PRC(2020)·22 citations

Affiliations

first authorsco-authorsvia INSPIRE