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Nuclear Theory·nucl-th

Thursday·August 3, 2023

6 papers—4 primary·2 cross-listed

All6Primary4Cross-lists2
  1. 01

    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.

    nucl-thhep-phUniverse(2023)·12 citations
  2. 02

    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.

    nucl-thPRC(2024)·9 citations
  3. 03

    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.

    nucl-thhep-exhep-phPoS(2024)·3 citations
  4. 04

    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.

    nucl-thPoS(2024)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE