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Nuclear Theory·nucl-th

Thursday·October 24, 2024

6 papers—3 primary·3 cross-listed

All6Primary3Cross-lists3
  1. 01

    [Submitted on 22 Oct 2024]

    A Machine Learning Approach to Trapped Many-Fermion Systems

    Paulo F. Bedaque · Hersh Kumar · Andy Sheng

    We apply a variational Ansatz based on neural networks to the problem of spin- fermions in a harmonic trap interacting through a short distance potential. We showed that standard machine learning techniques lead to a quick convergence to the ground state, especially in weakly coupled cases. Higher couplings can be handled efficiently by increasing the strength of interactions during "training".

    Comments:
    8 pages, 5 figures
    Subjects:
    Nuclear Theory (nucl-th); cond-mat.dis-nn (cond-mat.dis-nn); Quantum Physics (quant-ph)
    arXiv:
    2410.17383 [pdf]
    PRC(2025)·3 citations
  2. 02

    [Submitted on 22 Oct 2024]

    Subshell gaps and onsets of collectivity from proton and neutron pairing gap correlations

    José Nicolás Orce

    Throughout the nuclear chart, particle-hole correlations give rise to giant resonances and, together with the proton-neutron interaction, deformation and rotational bands. In order to shed light on many-body correlations in open-shell nuclei, I explore macroscopic properties that could manifest from the collective behavior of protons and neutrons. Intuitively, the correlation of proton and neutron Cooper pairs can be inferred from the respective pairing gaps, that can precisely be extracted from the AME 2020 atomic mass evaluation through odd-even atomic mass differences. This work shows that the combination of large and close-lying proton and neutron pairing gaps is sensitive to onsets of collectivity and subshell gaps in superfluid nuclei, away from major shell closures. Trends of reduced transition probabilities or B(E2) values -- which describe the collective overlap between the wave functions of initial and final nuclear states -- are revealed in overall agreement with data. Specially interesting is the peak of collectivity in the tin isotopes at Sn, instead of at midshell, as expected by large-scale shell-model calculations; a situation that has astounded the nuclear physics community for quite some time.

    Comments:
    5 pages, 5 figures
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2410.17436 [pdf]
    Atom.Data Nucl.Data Tabl.(2025)·1 citation
  3. 03

    [Submitted on 22 Oct 2024]

    Production of double strange hypernuclei and exotic nuclei in central Au+Au collisions at =3 GeV

    N. Buyukcizmeci🇹🇷 · T. Reichert🇩🇪 · A.S. Botvina🇩🇪 · M. Bleicher🇩🇪

    We extend the theoretical approach which includes the dynamical and statistical stages for the description of the nucleosynthesis in central collisions of relativistic ions. Previously, this approach was successfully applied to describe experimental data on both normal nuclei and single strange hypernuclei production in the GSI and RHIC-BES energy range. We predict the multiplicities of double strange hypernuclei up to H and further intermediate mass nuclei up to Be for Au+Au central collisions at =3 GeV, recently explored by the STAR experiments. These new nuclei can be identified by the measurement of the correlated particles coming after their decay. Such observations are a crucial test for the nucleosynthesis mechanism.

    Comments:
    7 pages, 4 figures, submitted to Eur. Phys. J. A
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2410.17449 [pdf]
    EPJA(2025)·6 citations
  4. 04

    [Submitted on 22 Oct 2024] (cross-list from hep-ph)

    Exploring Particle Production and Thermal-Like Behavior through Quantum Entanglement

    Alek Hutson🇺🇸 · Rene Bellwied🇺🇸

    Recent studies have shown a potential correlation between the entanglement of initial state partons in elementary particle collisions, as conceptualized by contemporary quantum and particle theory, and the final state multiplicity distribution of hadrons produced in experiments like those at the Large Hadron Collider (LHC). It has been proposed that this relation between states can be demonstrated in a measurement of entropy. By showing equality between entanglement entropy in the initial state and thermodynamic entropy in the final state, we hope to demonstrate that not only is entanglement the driving mechanism behind matter generation, but also the thermal-like behavior seen in high energy particle collisions.

    Comments:
    7 pages, 9 figures, submitted to Phys.Rev.C
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2410.17429 [pdf]
    Universe(2026)·2 citations
  5. 05

    [Submitted on 22 Oct 2024] (cross-list from hep-ph)

    Overview on the theory and phenomenology of generalized parton distributions

    Jian-Wei Qiu🇺🇸 · Zhite Yu🇺🇸

    We give a brief overview on the theory and phenomenology of generalized parton distributions (GPDs), including the recently developed framework of single-diffractive hard exclusive process for matching GPDs to experimental observables. We concentrate on the extraction of GPDs from experimental processes, especially on the challenges and potential solutions regarding the separation of different GPDs and the extraction of -dependence of GPDs, which is critically important for constructing the tomographic images and matching the -moments of GPDs to various emergent hadron properties.

    Comments:
    7 pages, 2 figures, contribution to Transversity 2024
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2410.17432 [pdf]
    PoS(2024)·1 citation
  6. 06

    [Submitted on 23 Oct 2024] (cross-list from hep-ph)

    Novel approach to investigate ATOMKI anomaly using Coherent CAPTAIN-Mills detectors

    Bhaskar Dutta🇺🇸 · Bai-Shan Hu🇺🇸 · Wei-Chih Huang🇺🇸 · Richard G. Van de Water🇺🇸

    ATOMKI nuclear anomaly has suggested a new BSM (Beyond the Standard Model) boson with mass MeV emitted from excited nuclei and quickly decays into a pair of . In order to search for the new particle, we propose a new approach that utilizes the ongoing Coherent CAPTAIN-Mills (CCM) 10-ton LAr (liquid argon) detectors. The neutrons from the Lujan target can scatter inelastically by the PMT glass in the CCM detector can produce the new boson which solves the ATOMKI anomaly. The new boson can be detected from its decay to a pair. We find that CCM probes a large area of the anomaly-allowable parameter space. We also show the prediction for a 100-ton LAr detector and 5-ton EOS water detector.

    Comments:
    8 pages, 6 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2410.17968 [pdf]
    PRL(2025)·7 citations

Affiliations

first authorsco-authorsvia INSPIRE