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Nuclear Theory·nucl-th

Wednesday·May 10, 2023

6 papers—4 primary·2 cross-listed

All6Primary4Cross-lists2
  1. 05

    [Submitted on 9 May 2023] (cross-list from hep-lat)

    Leading Power Accuracy in Lattice Calculations of Parton Distributions

    Rui Zhang🇺🇸 · Jack Holligan🇺🇸 · Xiangdong Ji🇺🇸 · Yushan Su🇺🇸

    In lattice-QCD calculations of parton distribution functions (PDFs) via large-momentum effective theory, the leading power (twist-three) correction appears as due to the linear-divergent self-energy of Wilson line in quasi-PDF operators. For lattice data with hadron momentum of a few GeV, this correction is dominant in matching, as large as 30\% or more. We show how to eliminate this uncertainty through choosing the mass renormalization parameter consistently with the resummation scheme of the infrared-renormalon series in perturbative matching coefficients. An example on the lattice pion PDF data at GeV shows an improvement of matching accuracy by a factor of more than in the expansion region .

    Comments:
    Updated to version published on PLB
    Subjects:
    High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2305.05212 [pdf]
    PLB(2023)·58 citations
  2. 06

    [Submitted on 9 May 2023] (cross-list from hep-ph)

    Configurational entropy and the Roper resonance in QCD

    G. Karapetyan🇧🇷

    The electroexcitation of the Roper resonance, which defines the first radially excited state of the nucleon, is examined within the soft-wall AdS/QCD model. Such excited Fock states are characterized by the leading three-quark component, which determines the main properties of Roper resonance. The differential configurational entropy (DCE) was used in the nuclear interaction with a gauge vector field for transition. Comparing the main results with the recent data of the CLAS Collaboration at JLab shows a good agreement on the accuracy of the computed data.

    Comments:
    19 pages, 4 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2305.05413 [pdf]
    Annals Phys.(2024)·5 citations

Affiliations

first authorsco-authorsvia INSPIRE