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Nuclear Theory·nucl-th

Thursday·December 22, 2022

11 papers—4 primary·7 cross-listed

All11Primary4Cross-lists7
  1. 01

    [Submitted on 20 Dec 2022]

    Baryon Number Transport, Strangeness Conservation and -hadron Correlations

    Xiatong Wu🇺🇸 · Weijie Dong🇨🇳 · Xiaozhou Yu🇨🇳 · Hui Li🇨🇳 · Gang Wang🇺🇸 · Huan Zhong Huang🇺🇸 · Zi-Wei Lin🇺🇸

    Although strange quarks are produced in pairs, the ratio of to is greater than one in heavy-ion collisions at lower RHIC energies. Thus the produced hyperons must carry net baryon quantum numbers from the colliding nuclei. We present results of - correlations from AMPT model simulations of Au+Au collisions at = 14.6 GeV, to probe dynamics for baryon number transport to mid-rapidities at this beam energy. We use both the default and string-melting versions to illustrate how hadronization schemes of quark coalescence and string fragmentations could leave imprints on such correlations. Implications on the measurements of these correlations with the STAR experiment at RHIC will also be discussed.

    Comments:
    submitted to SQM 2022 conference proceedings
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex)
    arXiv:
    2212.10568 [pdf]
    EPJ Web Conf.(2023)·0 citations
  2. 02

    [Submitted on 21 Dec 2022]

    The complete quantification of parametric uncertainties in (d,p) transfer reactions

    M. Catacora-Rios · Amy E.Lovell · Filomena M. Nunes

    Previous work quantified the uncertainty associated with the optical potentials between the nucleons and the target. In this study, we extend that work by also including the parameters of the mean field associated with the overlap function of the final bound state, thus obtaining the full parametric uncertainty on transfer observables. We use Bayesian Markov Chain Monte Carlo simulations to obtain parameter posterior distributions. We use elastic-scattering cross sections to constrain the optical potential parameters and use the asymptotic normalization coefficient of the final state to constrain the bound state interaction. We then propagate these posteriors to the transfer angular distributions and obtain confidence intervals for this observable. We study (d,p) reactions on 14C, 16O, and 48Ca at energies in the range E=10-24 MeV. Our results show a strong reduction in uncertainty by using the asymptotic normalization coefficient as a constraint, particularly for those reactions most sensitive to ambiguities in the mean-field. For those reactions, the importance of constraining the bound state interaction is equal to that of constrain the optical potentials. The case of 14C is an outlier because it populates a halo state, and the observable is less sensitive to the nuclear interior. We conclude that when minimal constraints are used on the parameters of the nucleon-target interaction, the 68% confidence interval uncertainties on the differential cross sections are very large (~ 140-185%). However, if elastic-scattering data and the asymptotic normalization coefficient are used in the analysis, with an error of 10% (5%), this uncertainty reduces to ~30% (~15%).

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2212.10698 [pdf]
    PRC(2023)·14 citations
  3. 03

    [Submitted on 21 Dec 2022]

    What is ab initio in nuclear theory?

    A. Ekström · C. Forssén · G. Hagen · G. R. Jansen · W. Jiang · T. Papenbrock

    Ab initio has been used as a label in nuclear theory for over two decades. Its meaning has evolved and broadened over the years. We present our interpretation, briefly review its historical use, and discuss its present-day relation to theoretical uncertainty quantification.

    Comments:
    Contribution to Research Topic "Uncertainty Quantification in Nuclear Physics" of Frontiers in Physics
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2212.11064 [pdf]
    Front.Phys.(2023)·94 citations
  4. 04

    [Submitted on 21 Dec 2022]

    Entanglement generation in few-nucleon scattering

    Dong Bai · Zhongzhou Ren

    Inspired by a recent Letter [S. R. Beane et al., Phys. Rev. Lett. 122, 102001(2019)], the entanglement generated in the elastic -wave scattering of and is studied, where the proton, neutron, He, and H are all regarded as qubits. To deal with the Coulomb interaction between the proton and He, we derive the entanglement power, a physical quantity that measures the average entanglement generated by a scattering process, for charged qubits within the screening method. The entanglement power in the aforementioned two few-nucleon scatterings is found to be generally much smaller than that in the -wave scattering at low energies, with the corresponding cluster effective field theories possessing an enhanced approximate symmetry at leading order. Our study suggests that the entanglement generation capacities of effective interactions between nucleons and light nuclei could be more suppressed than realistic nucleon-nucleon interactions at low energies.

    Comments:
    7 pages, 4 figures; published version
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2212.11092 [pdf]
    PRC(2022)·47 citations

Affiliations

first authorsco-authorsvia INSPIRE