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Nuclear Theory·nucl-th

Monday·January 18, 2021

10 papers—7 primary·3 cross-listed

All10Primary7Cross-lists3
  1. 08

    [Submitted on 15 Jan 2021] (cross-list from hep-lat)

    Three-body interactions from the finite-volume QCD spectrum

    Ruairí Brett🇺🇸 · Chris Culver🇬🇧 · Maxim Mai🇺🇸 · Andrei Alexandru🇺🇸 · Michael Döring🇺🇸 · Frank X. Lee🇺🇸

    We perform a fit of the finite-volume QCD spectrum of three pions at maximal isospin to constrain the three-body force. We use the unitarity-based relativistic three-particle quantization condition, with the GWUQCD spectrum obtained at 315 MeV and 220 MeV pion mass in two-flavor QCD. For the heavier pion mass we find that the data is consistent with a constant contact term close to zero, whereas for the lighter mass we see a statistically significant energy dependence in tension with the prediction of leading order ChPT. Our results also suggest that with enough three-body energy levels, the two-body amplitude could be constrained.

    Comments:
    17 pages, 6 figures. Updated to match published version
    Subjects:
    High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2101.06144 [pdf]
    PRD(2021)·73 citations
  2. 09

    [Submitted on 15 Jan 2021] (cross-list from physics.flu-dyn)

    Two Dimensional Turbulence in a Massless Fluid with a Relativistic Lattice Boltzmann Model

    Mark Watson🇺🇸

    We investigate a relativistic adaptation of the Lattice Boltzmann Method that reproduces the equations of motion for a turbulent, two-dimensional, massless hydrodynamic system. The classical Lattice Boltzmann Method and its extension to relativistic fluid dynamics is described. The numeric formulation is evaluated using a zero-averaged stirring force introduced into the numerics to induce turbulence, and the flow characteristics produced are compared to properties of a classical turbulent hydrodynamic flow. The model can reasonably be expected to offer quantitative simulations of electron fluid flows in graphene or Kagome lattices.

    Comments:
    28 pages, 11 Figures, Comments Welcome
    Subjects:
    Fluid Dynamics (physics.flu-dyn); High Energy Astrophysical Phenomena (astro-ph.HE); Strongly Correlated Electrons (cond-mat.str-el); Nuclear Theory (nucl-th)
    arXiv:
    2101.06187 [pdf]
    AIP Adv.(2021)·2 citations
  3. 10

    [Submitted on 15 Jan 2021] (cross-list from hep-ph)

    Electron-Ion Collider impact study on the tensor charge of the nucleon

    Leonard Gamberg🇺🇸 · Zhong-Bo Kang🇺🇸 · Daniel Pitonyak🇺🇸 · Alexei Prokudin🇺🇸 · Nobuo Sato🇺🇸 · Ralf Seidl🇺🇸

    In this letter we study the impact of the Electron-Ion Collider (EIC) on the phenomenological extraction of the tensor charge from a QCD global analysis of single transverse-spin asymmetries (SSAs). We generate EIC pseudo-data for the Collins effect in semi-inclusive deep-inelastic scattering for proton and beams across multiple center-of-mass energies. We find a significant reduction in the uncertainties for the up, down, and isovector tensor charges that will make their extraction from EIC data on SSAs as precise as current lattice QCD calculations. We also analyze the constraints placed by future data from the proposed SoLID experiment at Jefferson Lab, discuss its important complementary role to the EIC, and present the combined impact from both facilities.

    Comments:
    12 pages, 6 figures, 1 table; minor changes; version to be published in PLB
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    2101.06200 [pdf]
    PLB(2021)·18 citations

Affiliations

first authorsco-authorsvia INSPIRE