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Nuclear Theory·nucl-th

Friday·September 7, 2018

7 papers—4 primary·3 cross-listed

All7Primary4Cross-lists3
  1. 05

    [Submitted on 6 Sept 2018] (cross-list from hep-ph)

    Multiplicative renormalizability of quasi-parton operators

    Zheng-Yang Li🇨🇳 · Yan-Qing Ma🇨🇳 · Jian-Wei Qiu🇺🇸

    Extracting parton distribution functions (PDFs) from lattice QCD calculation of quasi-PDFs has been actively pursued in recent years. We extend our proof of the multiplicative renormalizability of quasi-quark operators in Ref. [1] to quasi-gluon operators, and demonstrated that quasi-gluon operators could be multiplicatively renormalized to all orders in perturbation theory, without mixing with other operators. We find that using a gauge-invariant UV regulator is essential for achieving this proof. With the multiplicative renormalizability of both quasi-quark and quasi-gluon operators, and QCD collinear factorization of hadronic matrix elements of there operators into PDFs, extracting PDFs from lattice QCD calculated hadronic matrix elements of quasi-parton operators could have a solid theoretical foundation.

    Comments:
    7 pages, 4 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    1809.01836 [pdf]
    PRL(2019)·87 citations
  2. 06

    [Submitted on 6 Sept 2018] (cross-list from hep-ph)

    Regge phenomenology of the and poles

    JPAC collaboration: J.A. Silva-Castro🇲🇽 · C. Fernandez-Ramirez🇲🇽 · M. Albaladejo🇪🇸 · I.V. Danilkin🇩🇪 · A. Jackura🇺🇸 · V. Mathieu🇺🇸 · J. Nys🇧🇪 · A. Pilloni🇺🇸 · A.P. Szczepaniak🇺🇸 · G. Fox🇺🇸

    We use Regge phenomenology to study the structure of the poles of the and spectrum. We employ the available pole extractions from partial wave analysis of meson scattering and photoproduction data. We assess the importance of the imaginary part of the poles (widths) to obtain a consistent determination of the parameters of the Regge trajectory. We compare the several pole extractions and show how Regge phenomenology can be used to gain insight in the internal structure of baryons. We find that the majority of the states in the parent Regge trajectories are compatible with a mostly compact three-quark state picture.

    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1809.01954 [pdf]
    PRD(2019)·16 citations
  3. 07

    [Submitted on 6 Sept 2018] (cross-list from hep-ph)

    QCD at high density: Equation of state for nuclear collisions and neutron stars

    Anton Motornenko🇩🇪 · Volodymyr Vovchenko🇩🇪 · Jan Steinheimer🇩🇪 · Stefan Schramm🇩🇪 · Horst Stoecker🇩🇪

    A unified chiral mean field approach is presented for QCD thermodynamics in a wide range of temperatures and densities. The model simultaneously gives a satisfactory description of lattice QCD thermodynamics and fulfills nuclear matter and astrophysical constraints. The resulting equation of state can be incorporated in relativistic fluid-dynamical simulations of heavy-ion collisions and neutron stars mergers. Access to different regions of the QCD phase diagram can be obtained in simulations of heavy-ion data and observations of neutron star mergers.

    Comments:
    4 pages, 2 figures. Contribution to the Quark Matter 2018 conference proceedings
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
    arXiv:
    1809.02000 [pdf]
    NPA(2019)·15 citations

Affiliations

first authorsco-authorsvia INSPIRE