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Nuclear Theory·nucl-th

Wednesday·May 3, 2017

6 papers—3 primary·3 cross-listed

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  1. 01

    [Submitted on 2 May 2017]

    Photon production spectrum above with a lattice quark propagator

    Taekwang Kim🇯🇵 · Masayuki Asakawa🇯🇵 · Masakiyo Kitazawa🇯🇵

    The photon production rate from the deconfined medium is analyzed with the photon self-energy constructed from the quark propagator obtained by the numerical simulation on the quenched lattice for two values of temperature, and , above the critical temperature . The photon self-energy is calculated by the Schwinger-Dyson equation with the lattice quark propagator and a vertex function determined so as to satisfy the Ward-Takahashi identity. The obtained photon production rate exhibits a similar behavior as the perturbative results at the energy of photons larger than ~GeV.

    Comments:
    11 pages, 10 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1705.00755 [pdf]
    PTEP(2018)·0 citations
  2. 02

    [Submitted on 28 Apr 2017]

    Neutron Parton Structure And The Light-Front Spectral Function Of 3He

    Emanuele Pace🇮🇹 · Alessio Del Dotto🇮🇹 · Leonid Kaptari🇷🇺 · Matteo Rinaldi🇪🇸 · Giovanni Salmè🇮🇹 · Sergio Scopetta🇮🇹

    Semi-inclusive deep inelastic electron scattering off polarized 3He is studied in a non-relativistic framework, using a distorted spin-dependent spectral function for 3He to take care of the final state interaction between the observed pion and the remnant. A simple procedure is shown to be valuable for the extraction of Sivers and Collins asymmetries for the neutron fromthe corresponding asymmetries for 3He. To extend this study in a relativistic framework, a novel approach for a Poincaré covariant description of nuclear dynamics is presented, based on the light-front Hamiltonian dynamics. The key quantity is the light-front spectral function, where both normalization and momentum sum rule can be satisfied at the same time. Preliminary results are discussed for an initial analysis of the role of relativity in the EMC effect in 3He, and the generalization of the procedure for the extraction of neutron asymmetries within the light-front dynamics is outlined.

    Comments:
    Pages 8, figures 3. Talk given at the 26th International Nuclear Physics Conference, 11-16 September, 2016, Adelaide, Australia, to be published in Proceedings of Science. Comments added. arXiv admin note: text overlap with arXiv:1602.06521
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Theory (hep-th)
    arXiv:
    1705.00966 [pdf]
    PoS(2017)·3 citations
  3. 03

    [Submitted on 2 May 2017]

    Baryon susceptibilities from a holographic equation of state

    Israel Portillo🇺🇸

    A black hole holographic model is used to mimic the behavior of the quark gluon plasma at finite temperature and density. This model reproduces lattice data at and displays critical behavior at large densities. High order baryon susceptibilities are used to extract freeze-out points by comparing those susceptibilities with the corresponding net-protons distribution measured by STAR. Possible experimental signatures of the critical end point are discussed.

    Comments:
    4 pages, 3 figures, proceedings for Quark Matter 2017
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1705.01021 [pdf]
    NPA(2017)·6 citations

Affiliations

first authorsco-authorsvia INSPIRE