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Nuclear Theory·nucl-th

Wednesday·October 12, 2016

9 papers—3 primary·6 cross-listed

All9Primary3Cross-lists6
  1. 04

    [Submitted on 11 Oct 2016] (cross-list from hep-ph)

    Strongly interacting matter from holographic QCD model

    Yidian Chen🇨🇳 · Danning Li🇨🇳 · Mei Huang🇨🇳

    We introduce the 5-dimension dynamical holographic QCD model, which is constructed in the graviton-dilaton-scalar framework with the dilaton background field and the scalar field responsible for the gluodynamics and chiral dynamics, respectively. We review our results on the hadron spectra including the glueball and light meson spectra, QCD phase transitions and transport properties in the framework of the dynamical holographic QCD model.

    Comments:
    8 pages, 8 figures, proceedings for QCD@Work2016, June 27-30,2014, Martina Franca, Italy. arXiv admin note: text overlap with arXiv:1409.8432
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    1610.03247 [pdf]
    EPJ Web Conf.(2016)·1 citation
  2. 05

    [Submitted on 11 Oct 2016] (cross-list from hep-ph)

    Resonance poles and threshold energies for hadron physical problems by a model-independent universal algorithm

    Ralf-Arno Tripolt🇮🇹 · Idan Haritan🇮🇱 · Jochen Wambach🇮🇹 · Nimrod Moiseyev🇮🇱

    We show how complex resonance poles and threshold energies for systems in hadron physics can be accurately obtained by using a method based on the Padé-approximant which was recently developed for the calculation of resonance poles for atomic and molecular auto-ionization systems. The main advantage of this method is the ability to calculate the resonance poles and threshold energies from \emph{real} spectral data. In order to demonstrate the capabilities of this method we apply it here to an analytical model as well as to experimental data for the squared modulus of the vector pion form factor, the S0 partial wave amplitude for scattering and the cross section ratio for collisions. The extracted values for the resonance poles of the and the or meson are in very good agreement with the literature. When the data are noisy the prediction of decay thresholds proves to be less accurate but feasible.

    Comments:
    6 pages, 4 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1610.03252 [pdf]
    PLB(2017)·76 citations
  3. 06

    [Submitted on 11 Oct 2016] (cross-list from hep-ph)

    Strange quark asymmetry in the proton in chiral effective theory

    X.G. Wang🇦🇺 · Chueng-Ryong Ji🇺🇸 · W. Melnitchouk🇺🇸 · Y. Salamu🇨🇳 · A.W. Thomas🇦🇺 · P. Wang🇨🇳

    We perform a comprehensive analysis of the strange-antistrange parton distribution function (PDF) asymmetry in the proton in the framework of chiral effective theory, including the full set of lowest order kaon loop diagrams with off-shell and contact interactions, in addition to the usual on-shell contributions previously discussed in the literature. We identify the presence of -function contributions to the PDF at , with a corresponding valence-like component of the -quark PDF at larger , which allows greater flexibility for the shape of . Expanding the moments of the PDFs in terms of the pseudoscalar kaon mass, we compute the leading nonanalytic behavior of the number and momentum integrals of the and distributions, consistent with the chiral symmetry of QCD. We discuss the implications of our results for the understanding of the NuTeV anomaly and for the phenomenology of strange quark PDFs in global QCD analysis.

    Comments:
    47 pages, 7 figures, 2 tables
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    1610.03333 [pdf]
    PRD(2016)·37 citations
  4. 07

    [Submitted on 11 Oct 2016] (cross-list from hep-lat)

    Across the deconfinement

    Claudio Bonati🇮🇹 · Massimo D'Elia🇮🇹 · Marco Mariti🇮🇹 · Michele Mesiti🇮🇹 · Francesco Negro🇮🇹 · Francesco Sanfilippo🇬🇧

    The deconfinement transition at vanishing chemical potential can be reliably studied by lattice simulations and its general features are by now well known. On the contrary, what happens at finite density is still largely unknown and we will review the results obtained in the last year regarding the dependence, for small density, of the (pseudo)critical temperature on the baryonic chemical potential.

    Comments:
    5 pages, 5 eps figures. Presented at CPOD 2016, Wroclaw 30 May - 4 June 2016
    Subjects:
    High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    1610.03338 [pdf]
    Acta Phys.Polon.Supp.(2017)·3 citations
  5. 08

    [Submitted on 11 Oct 2016] (cross-list from astro-ph.HE)

    Equations of state for supernovae and compact stars

    M. Oertel🇫🇷 · M. Hempel🇨🇭 · T. Klähn🇵🇱 · S. Typel🇩🇪

    We review various theoretical approaches for the equation of state (EoS) of dense matter, relevant for the description of core-collapse supernovae, compact stars and compact star mergers. The emphasis is put on models that are applicable to all of these scenarios. Such EoS models have to cover large ranges in baryon number density, temperature and isospin asymmetry. The characteristics of matter change dramatically within these ranges, from a mixture of nucleons, nuclei, and electrons to uniform, strongly interacting matter containing nucleons, and possibly other particles such as hyperons or quarks. As the development of an EoS requires joint efforts from many directions we consider different theoretical approaches and discuss relevant experimental and observational constraints which provide insights for future research. Finally, results from applications of the discussed EoS models are summarized.

    Comments:
    74 pages, 19 figures
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR); Nuclear Theory (nucl-th)
    arXiv:
    1610.03361 [pdf]
    RMP(2017)·1260 citations
  6. 09

    [Submitted on 11 Oct 2016] (cross-list from hep-ph)

    High Energy QCD at NLO: from light-cone wave function to JIMWLK evolution

    Michael Lublinsky🇮🇱 · Yair Mulian🇮🇱

    Soft components of the light cone wave-function of a fast moving projectile hadron is computed in perturbation theory to third order in QCD coupling constant. At this order, the Fock space of the soft modes consists of one-gluon, two-gluon, and a quark-antiquark states. The hard component of the wave-function acts as a non-Abelian background field for the soft modes and is represented by a valence charge distribution that accounts for non-linear density effects in the projectile. When scattered off a dense target, the diagonal element of the S-matrix reveals the Hamiltonian of high energy evolution, the JIMWLK Hamiltonian. This way we provide a new direct derivation of the JIMWLK Hamiltonian at the Next-to-Leading Order.

    Comments:
    83 pages, 15 figures; explanatory comments added, published version
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    1610.03453 [pdf]
    JHEP(2017)·82 citations

Affiliations

first authorsco-authorsvia INSPIRE