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Nuclear Theory·nucl-th

Friday·May 31, 2024

15 papers—5 primary·10 cross-listed

All15Primary5Cross-lists10
  1. 01

    [Submitted on 29 May 2024]

    Unveiling baryon charge carriers through charge stopping in isobar collisions

    Gregoire Pihan🇺🇸 · Akihiko Monnai🇯🇵 · Björn Schenke🇺🇸 · Chun Shen🇺🇸

    Utilizing a comprehensive (3+1)D relativistic hydrodynamic framework with multiple conserved charge currents and charge-dependent Lattice-QCD-based equation of state, we study the baryon and electric charge number deposition at mid rapidity in isobar Ru+Ru and Zr+Zr collisions at the center of mass energy GeV. Comparing our predictions with upcoming experimental data from the Relativistic Heavy Ion Collider will shed light on the existence of baryon junctions.

    Comments:
    6 pages, 2 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2405.19439 [pdf]
    PRL(2024)·22 citations
  2. 02

    [Submitted on 30 May 2024]

    Factorized Approximation to the IMSRG(3)

    B.C. He · S.R. Stroberg

    We describe an approximation to the in-medium similarity renormalization group (IMSRG) method in which we include the effects of intermediate three-body operators arising within nested commutators. As an initial step, we present the relevant equations for two nested commutators, all of which can be factorized so that the method scales like the standard IMSRG(2) approximation, enabling large-scale calculations. We test the accuracy of this approximation scheme, and apply it to the isotopic chains of carbon, sulfur and nickel isotopic chains. We obtain an improved description of spectroscopy, and a reduced dependence on the choice of the valence space. In addition, we provide an explanation of the relative importance of the diagram topologies included, with an eye toward assessing the impact of remaining omitted terms.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2405.19594 [pdf]
    PRC(2024)·45 citations
  3. 03

    [Submitted on 30 May 2024]

    Unraveling the global behavior of equation of state by explicit finite nuclei constraints

    Anagh Venneti · Sakshi Gautam · Sarmistha Banik · B. K. Agrawal

    We obtain posterior distribution of equations of state (EOSs) across a broad range of density by imposing explicitly the constraints from precisely measured fundamental properties of finite nuclei, in combination with the experimental data from heavy-ion collisions and the astrophysical observations of radius, tidal deformability and minimum-maximum mass of neutron stars. The acquired EOSs exhibit a distinct global behavior compared to those usually obtained by imposing the finite nuclei constraints implicitly through empirical values of selected key parameters describing symmetric nuclear matter and symmetry energy in the vicinity of the saturation density. The explicit treatment of finite nuclei constraints yields softer EOSs at low densities which eventually become stiffer to meet the maximum mass criteria. The Kullback-Leibler divergence has been used to perform a quantitative comparison of the distributions of neutron star properties resulting from the EOSs obtained from implicit and explicit finite nuclei constraints.

    Comments:
    The manuscript has been accepted by Physics Letters B on May 24th 2024
    Subjects:
    Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE)
    arXiv:
    2405.19733 [pdf]
    PLB(2024)·9 citations
  4. 04

    [Submitted on 30 May 2024]

    Anisotropic flow in fixed-target Pb+Ne collisions as a probe of quark-gluon plasma

    Giuliano Giacalone🇩🇪 · Wenbin Zhao🇺🇸 · Benjamin Bally🇫🇷 · Shihang Shen🇩🇪 · Thomas Duguet🇫🇷 · Jean-Paul Ebran🇫🇷 · Serdar Elhatisari🇹🇷 · Mikael Frosini🇫🇷 · Timo A. Lähde🇩🇪 · Dean Lee🇺🇸 · Bing-Nan Lu🇨🇳 · Yuan-Zhuo Ma🇺🇸 and 10 other authors

    The System for Measuring Overlap with Gas (SMOG2) at the LHCb detector enables the study of fixed-target ion-ion collisions at relativistic energies ( GeV in the centre-of-mass). With input from \textit{ab initio} calculations of the structure of O and Ne, we compute 3+1D hydrodynamic predictions for the anisotropic flow of Pb+Ne and Pb+O collisions, to be tested with upcoming LHCb data. This will allow the detailed study of quark-gluon plasma (QGP) formation as well as experimental tests of the predicted nuclear shapes. Elliptic flow () in Pb+Ne collisions is greatly enhanced compared to the Pb+O baseline due to the shape of Ne, which is deformed in a bowling-pin geometry. Owing to the large Pb radius, this effect is seen in a broad centrality range, a unique feature of this collision configuration. Larger elliptic flow further enhances the quadrangular flow () of Pb+Ne collisions via non-linear coupling, and impacts the sign of the kurtosis of the elliptic flow vector distribution (). Exploiting the shape of Ne proves thus an ideal method to investigate the formation of QGP in fixed-target experiments at LHCb, and demonstrates the power of SMOG2 as a tool to image nuclear ground states.

    Comments:
    Updated the version that published in Phys. Rev. Lett. 134.082301
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    2405.20210 [pdf]
    PRL(2025)·64 citations
  5. 05

    [Submitted on 30 May 2024]

    Astrophysical aspects of CN reaction

    Soumya Saha

    The Carbon-Nitrogen-Oxygen (CNO) cycle is fundamental to the process of hydrogen burning in stars, serving as a pivotal mechanism. At its core, the primary reaction involves the radiative capture of a proton by C, crucially influencing the isotopic ratio of C to C observed in celestial bodies, including our Solar System. We have addressed this reaction mechanism by extrapolating to low-energy cross sections and S-factors with the aid of astrophysical R-matrix. Our investigation aims to shed light on its implications for nuclear reaction rates, thus influencing the abundance ratio of C to C in the cosmic environment.

    Comments:
    7 pages, 2 figures, Under referred journal publication
    Subjects:
    Nuclear Theory (nucl-th); Solar and Stellar Astrophysics (astro-ph.SR)
    arXiv:
    2405.20223 [pdf]
    0 citations

Affiliations

first authorsco-authorsvia INSPIRE