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Nuclear Theory·nucl-th

Wednesday·January 6, 2016

8 papers—4 primary·4 cross-listed

All8Primary4Cross-lists4
  1. 05

    [Submitted on 1 Jan 2016] (cross-list from hep-ph)

    Calculating Masses of Pentaquarks Composed of Baryons and Mesons

    Majid Monemzadeh🇮🇷 · Narges Tazimi🇮🇷 · Shahnaz Babaghodrat🇮🇷

    In this paper, we consider an exotic baryon (pentaquark) as a bound state of two-particle systems composed of a baryon (nucleon) and a meson.We used a baryon - meson picture to reduce a complicated five-body problem to a simple two-body problems. The homogeneous Lippmann-Schwinger integral equation is solved in configuration space by using one pion exchange potential. We calculate the masses of pentaquarks , .

    Comments:
    we need to checked our calculations again for mor confidence
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1601.00642 [pdf]
    Adv.High Energy Phys.(2016)·14 citations
  2. 06

    [Submitted on 5 Jan 2016] (cross-list from hep-ph)

    Charmed meson and charmonium production in PbPb collisions at the LHC

    I.P. Lokhtin🇷🇺 · A.V. Belyaev🇷🇺 · G.Kh. Eyyubova🇨🇿 · G. Ponimatkin🇨🇿 · E.Yu. Pronina🇷🇺

    The phenomenological analysis of various characteristics of and meson production in PbPb collisions at the center-of-mass energy 2.76 TeV per nucleon pair is presented. The data on momentum spectra and elliptic flow are reproduced by two-component model HYDJET++ including thermal and non-thermal charm production mechanisms. The significant part of -mesons is found to be in a kinetic equilibrium with the created medium, while -mesons are characterized by earlier (as compared to light hadrons) freeze-out.

    Comments:
    15 pages including 8 figures as EPS-files; prepared using LaTeX package for publication in the Journal of Physics G
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1601.00799 [pdf]
    J.Phys.G(2016)·14 citations
  3. 07

    [Submitted on 5 Jan 2016] (cross-list from hep-ph)

    Resonance on top of thresholds: the as an extremely fine-tuned state

    Zhi-Hui Guo🇨🇳 · J.A. Oller🇪🇸

    A dedicated study of the scattering around its threshold is carried out in this work to probe the nature of . We first demonstrate that the effective range expansion approach fails to work near the pole position, due to the presence of a nearby CDD pole around the thresholds. We then develop a general framework to properly handle the situation with a CDD pole accompanied by nearby thresholds, which is first elaborated for the single-channel case and then generalized to the coupled-channel study. The isospin breaking effects of the three channels with different thresholds are specially taken into account in our study. The finite-width effects from the baryons are considered and found to be relevant to give the width fully compatible to its experimental value. Through the compositeness analysis, our robust conclusion is that the component is subdominant inside the .

    Comments:
    22 pages, 6 figures. To match the published version in Phys.Rev.D
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    1601.00862 [pdf]
    PRD(2016)·43 citations
  4. 08

    [Submitted on 5 Jan 2016] (cross-list from hep-ph)

    Charge-dependent correlations from event-by-event anomalous hydrodynamics

    Yuji Hirono🇺🇸 · Tetsufumi Hirano🇯🇵 · Dmitri E. Kharzeev🇺🇸

    We report on our recent attempt of quantitative modeling of the Chiral Magnetic Effect (CME) in heavy-ion collisions. We perform 3+1 dimensional anomalous hydrodynamic simulations on an event-by-event basis, with constitutive equations that contain the anomaly-induced effects. We also develop a model of the initial condition for the axial charge density that captures the statistical nature of random chirality imbalances created by the color flux tubes. Basing on the event-by-event hydrodynamic simulations for hundreds of thousands of collisions, we calculate the correlation functions that are measured in experiments, and discuss how the anomalous transport affects these observables.

    Comments:
    4 pages, 1 figure, proceedings of Quark Matter 2015
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1601.00887 [pdf]
    NPA(2016)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE