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Nuclear Theory·nucl-th

Friday·January 16, 2015

14 papers—11 primary·3 cross-listed

All14Primary11Cross-lists3
  1. 12

    [Submitted on 15 Jan 2015] (cross-list from hep-ph)

    Electrical Conductivity of an Anisotropic Quark Gluon Plasma : A Quasiparticle Approach

    P. K. Srivastava🇮🇳 · Lata Thakur🇮🇳 · Binoy Krishna Patra🇮🇳

    The study of transport coefficients of strongly interacting matter got impetus after the discovery of perfect fluid ever created at ultrarelativistic heavy ion collision experiments. In this article, we have calculated one such coefficient viz. electrical conductivity of the quark gluon plasma (QGP) phase which exhibits a momentum anisotropy. Relativistic Boltzmann's kinetic equation has been solved in the relaxation-time approximation to obtain the electrical conductivity. We have used the quasiparticle description to define the basic properties of QGP. We have compared our model results with the corresponding results obtained in different lattice as well as other model calculations. Furthermore, we extend our model to calculate the electrical conductivity at finite chemical potential.

    Comments:
    8 pages, 4 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1501.03576 [pdf]
    PRC(2015)·44 citations
  2. 13

    [Submitted on 15 Jan 2015] (cross-list from hep-ph)

    X(3872), I^G(J^{PC})=0^+(1^{++}), as the \chi_{1c}(2P) charmonium

    N.N. Achasov🇷🇺 · E.V. Rogozina🇷🇺

    Contrary to almost standard opinion that the X(3872) resonance is the D^{*0}\bar D^0+c.c. molecule or the qc\bar q\bar c four-quark state, we discuss the scenario where the X(3872)resonance is the c\bar c = \chi_{c1}(2P) charmonium which "sits on" the D^{*0}\bar D^0 threshold. We explain the shift of the mass of the X(3872) resonance with respect to the prediction of a potential model for the mass of the \chi_{c1}(2P) charmonium by the contribution of the virtual D^*\bar D+c.c. intermediate states into the self energy of the X(3872) resonance. This allows us to estimate the coupling constant of the X(7872) resonance with the D^{*0}\bar D^0 channel, the branching ratio of the X(3872) \to D^{*0}\bar D^0 + c.c. decay, and the branching ratio of the X(3872) decay into all non-D^{*0}\bar D^0 + c.c. states. We predict a significant number of unknown decays of X(3872) via two gluon:X(3872)\to gluon\ gluon\to hadrons. We suggest a physically clear program of experimental researches for verification of our assumption.

    Comments:
    7 pages, 3 figures, corrected typos, changed Abstract, added reference, added the phrase: <Such a transition \sim \sqrt{V_{\chi_{c1}(2P)}/V_{X(3872)}} and a branching ratio of a decay via such a transition \sim V_{\chi_{c1}(2P)}/V_{X(3872)}.> - in conclusion in comparison with the publication Mod. Phys. Lett. A , 30, 1550181 (2015). added clarifications
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    1501.03583 [pdf]
    Mod.Phys.Lett.A(2015)·45 citations
  3. 14

    [Submitted on 15 Jan 2015] (cross-list from hep-ph)

    Modeling the pion Generalized Parton Distribution

    C. Mezrag🇫🇷

    We compute the pion Generalized Parton Distribution (GPD) in a valence dressed quarks approach. We model the Mellin moments of the GPD using Ansätze for Green functions inspired by the numerical solutions of the Dyson-Schwinger Equations (DSE) and the Bethe-Salpeter Equation (BSE). Then, the GPD is reconstructed from its Mellin moment using the Double Distribution (DD) formalism. The agreement with available experimental data is very good.

    Comments:
    8 pages, 4 figures, proceeding of the 21st International Symposium on Spin Physics, October 20-24 2014, Beijing, China
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1501.03699 [pdf]
    Int.J.Mod.Phys.Conf.Ser.(2016)·2 citations

Affiliations

first authorsco-authorsvia INSPIRE