PaperPanorama
FAQ

Nuclear Theory·nucl-th

Thursday·August 3, 2023

6 papers—4 primary·2 cross-listed

All6Primary4Cross-lists2
  1. 01

    [Submitted on 1 Aug 2023]

    Lepton-Nucleus Interactions within Microscopic Approaches

    Alexis Nikolakopoulos🇺🇸 · Noah Steinberg🇺🇸 · Alessandro Lovato🇺🇸 · Noemi Rocco🇺🇸

    This review paper emphasizes the significance of microscopic calculations with quantified theoretical error estimates in studying lepton-nucleus interactions and their implications for electron-scattering and accelerator neutrino-oscillation measurements. We investigate two approaches: Green's Function Monte Carlo and the extended factorization scheme, utilizing realistic nuclear target spectral functions. In our study, we include relativistic effects in Green's Function Monte Carlo and validate the inclusive electron-scattering cross section on carbon using available data. We compare the flux folded cross sections for neutrino-Carbon scattering with T2K and MINERA experiments, noting the substantial impact of relativistic effects in reducing the theoretical curve strength when compared to MINERA data. Additionally, we demonstrate that quantum Monte Carlo-based spectral functions accurately reproduce the quasi-elastic region in electron-scattering data and T2K flux folded cross sections. By comparing results from Green's Function Monte Carlo and the spectral function approach, which share a similar initial target state description, we quantify errors associated with approximations in the factorization scheme and the relativistic treatment of kinematics in Green's Function Monte Carlo.

    Comments:
    30 pages, 9 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2308.00736 [pdf]
    Universe(2023)·12 citations
  2. 02

    [Submitted on 1 Aug 2023]

    Variational and parquet-diagram calculations for neutron matter. V. Triplet pairing

    E. Krotscheck\' · P. Papakonstantinou · J. Wang

    We apply a large-scale summation of Feynman diagrams, including the class of parquet-diagrams {\em plus} important contributions outside the parquet class, for calculating effective pairing interactions and subsequently the superfluid gap in P-wave pairing in neutron matter. We employ realistic nucleon-nucleon interactions of the type and perform calculations up to a Fermi momentum of fm. We find that many-body correlations lead to a strong reduction of the spin-orbit interaction, and, therefore, to an almost complete suppression of the P and P-F gaps. We also find pairing in P states; the strength of the pairing gap depends sensitively on the potential model employed. Our results for triplet pairing are relevant for assessing superfluidity in neutron star interiors, whose presence can affect the cooling of neutron stars.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2308.00873 [pdf]
    PRC(2024)·9 citations
  3. 03

    [Submitted on 2 Aug 2023]

    Open heavy flavors: Theory

    Santosh K. Das🇮🇳

    A brief overview of the theory of open heavy flavor dynamics in QCD matter produced in high energy heavy-ion collisions is presented. First, we will summarise the phenomenological efforts to estimate the heavy quark diffusion coefficients obtained within different models. Then, the recent theoretical developments from different groups to probe the medium properties using heavy quarks will be presented. Heavy quarks are also considered as an ideal probe for the initial stage of heavy-ion collisions. In the end, we present the recent theoretical progress made to probe the early-stage effects, pre-equilibrium phase, and electromagnetic fields.

    Comments:
    Hard Probes 2023 conference proceedings
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Experiment (hep-ex); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2308.01167 [pdf]
    PoS(2024)·3 citations
  4. 04

    [Submitted on 2 Aug 2023]

    Thermalization of a jet wake in QCD kinetic theory

    Fabian Zhou🇩🇪 · Jasmine Brewer🇨🇭 · Aleksas Mazeliauskas🇩🇪

    We study the energy deposition of a high-momentum parton traveling through a Quark-Gluon Plasma using QCD kinetic theory. We show that the energy is first transported to the soft sector by collinear cascade and then isotropised by elastic scatterings. Remarkably, we find that the jet wake can be well described by a thermal distribution function with angle-dependent temperature. This could be used for effective phenomenological descriptions of jet thermalization in realistic heavy-ion collision simulations.

    Comments:
    6 pages, 7 figures, proceedings of the 11th International Conference on Hard and Electromagnetic Probes of High Energy Nuclear Collisions (Hard Probes 2023)
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2308.01177 [pdf]
    PoS(2024)·0 citations
  5. 05

    [Submitted on 1 Aug 2023] (cross-list from hep-ph)

    Energy Correlators Taking Charge

    Kyle Lee🇺🇸 · Ian Moult🇺🇸

    The confining transition from asymptotically free partons to hadrons remains one of the most mysterious aspects of Quantum Chromodynamics. With the wealth of high quality jet substructure data we can hope to gain new experimental insights into the details of its dynamics. Jet substructure has traditionally focused on correlations, , in the energy flux of hadrons. However, significantly more information about the confinement transition is encoded in how energy is correlated between hadrons with different quantum numbers, for example electric charge. In this Letter we develop the field theoretic formalism to compute general correlations, , between the energy flux carried by hadrons with quantum numbers , by introducing new universal non-perturbative functions, which we term joint track functions. Using this formalism we show that the strong interactions introduce enhanced small angle correlations between opposite-sign hadrons, relative to like-sign hadrons, identifiable as an enhanced scaling of relative to . We are also able to compute the scaling of a -odd three-point function, . Our results greatly extend the class of systematically computable jet substructure observables, pushing perturbation theory deeper into the parton to hadron transition, and providing new observables to understand the dynamics of confinement.

    Comments:
    6 pages, 5 incredible figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2308.00746 [pdf]
    58 citations
  6. 06

    [Submitted on 1 Aug 2023] (cross-list from hep-ph)

    Theory of the (Heavy-Quark) Exotic Hadrons: A Primer for the Flavor Community

    Richard F. Lebed🇺🇸

    Scores of exotic hadrons, particularly tetraquarks and pentaquarks in the heavy-quark sector, have been observed in the past 20 years, and more continue to be discovered to this day. Unlike mesons and baryons, such exotics are not mandated to exist under our current understanding of QCD, meaning that each new discovery presents fresh insights into the expansive possibilities of strong-interaction physics. Even the basic architecture of these multiquark states remains an open question. Here we discuss the merits and deficiencies of their best-known dynamical descriptions, recognizing that the eventual universal model for exotics will almost certainly require the synthesis of more than one fundamental paradigm.

    Comments:
    13 pages, 1 figure. Accepted to appear in Proceedings of Science. Based on invited talk at the 21st Conference on Flavor Physics and CP Violation (FPCP 2023), Lyon, France (29 May-2 June 2023)
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    2308.00781 [pdf]
    PoS(2023)·17 citations

Affiliations

first authorsco-authorsvia INSPIRE