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Nuclear Theory·nucl-th

Wednesday·September 21, 2016

7 papers—5 primary·2 cross-listed

All7Primary5Cross-lists2
  1. 01

    [Submitted on 20 Sept 2016]

    Competitive effects of nuclear deformation and density dependence of interaction

    M. Isaka🇯🇵 · Y. Yamamoto🇯🇵 · T h.A. Rijken🇯🇵

    Competitive effects of nuclear deformation and density dependence of -interaction in binding energies of hypernuclei are studied systematically on the basis of the baryon-baryon interaction model ESC including many-body effects. By using the G-matrix interaction derived from ESC, we perform microscopic calculations of in hypernuclei within the framework of the antisymmetrized molecular dynamics under the averaged-density approximation. The calculated values of reproduce experimental data within a few hundred keV in the wide mass regions from 9 to 51. It is found that competitive effects of nuclear deformation and density dependence of -interaction work decisively for fine tuning of values.

    Comments:
    7 pages, 1 figure
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1609.06009 [pdf]
    PRC(2016)·17 citations
  2. 02

    [Submitted on 20 Sept 2016]

    Heavy flavor and in event-by-event viscous relativistic hydrodynamics

    Caio A. G. Prado🇧🇷 · Jacquelyn Noronha-Hostler🇺🇸 · Mauro R. Cosentino🇧🇷 · Marcelo G. Munhoz🇧🇷 · Jorge Noronha🇧🇷 · Alexandre A. P. Suaide🇧🇷

    Recently it has been shown that a realistic description of the medium via event-by-event viscous hydrodynamics plays an important role in the long-standing vs. puzzle at high . In this proceedings we begin to extend this approach to the heavy flavor sector by investigating the effects of full event-by-event fluctuating hydrodynamic backgrounds on the nuclear suppression factor and of heavy flavor mesons and non-photonic electrons at intermediate to high . We also show results for of and D for PbPb collisions at TeV.

    Comments:
    4 pages, 3 figures, contribution to the proceedings of the Strangeness in Quark Matter conference (June 27 to July 1, 2016, Berkeley, CA, USA)
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1609.06093 [pdf]
    J.Phys.Conf.Ser.(2017)·7 citations
  3. 03

    [Submitted on 19 Sept 2016]

    Quark and Gluon Production from a Boost-invariantly Expanding Color Electric Field

    Hidetoshi Taya🇯🇵

    Particle production from an expanding classical color electromagnetic field is extensively studied, motivated by the early stage dynamics of ultra-relativistic heavy ion collisions. We develop a formalism at one-loop order to compute the particle spectra by canonically quantizing quark, gluon and ghost fluctuations under the presence of such an expanding classical color background field; the canonical quantization is done in the - coordinates in order to take into account manifestly the expanding geometry. As a demonstration, we model the expanding classical color background field by a boost-invariantly expanding homogeneous color electric field with lifetime , for which we obtain analytically the quark and gluon production spectra by solving the equations of motion of QCD non-perturbatively with respect to the color electric field. In this paper we study (i) finite lifetime effect which is found to modify significantly the particle spectra from those expected from the Schwinger formula; (ii) the difference between the quark and gluon production; and (iii) the quark mass dependence of the production spectra. Implications of these results to ultra-relativistic heavy ion collisions are also discussed.

    Comments:
    34 pages, 7 figures; v2: PRD version, v3: notes added on current author's affiliation
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1609.06189 [pdf]
    PRD(2017)·13 citations
  4. 04

    [Submitted on 20 Sept 2016]

    Collisional broadening of angular correlations in a multiphase transport model

    Terrence Edmonds🇨🇳 · Qingfeng Li🇨🇳 · Fuqiang Wang🇨🇳

    Systematic comparisons of jetlike correlation data to radiative and collisional energy loss model calculations are essential to extract transport properties of the quark-gluon medium created in relativistic heavy ion collisions. This paper presents a transport study of collisional broadening of jetlike correlations, by following parton-parton collision history in a multiphase transport (AMPT) model. The correlation shape is studied as a function of the number of parton-parton collisions suffered by a high transverse momentum probe parton () and the azimuth of the probe relative to the reaction plane (). Correlation is found to broaden with increasing and from in- to out-of-plane direction. This study provides a transport model reference for future jet-medium interaction studies.

    Comments:
    6 pages 4 figures. Change from v1 to v2: removed one figure (limited usefulness), enriched Fig.2. v3: published version
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1609.06222 [pdf]
    NPA(2017)·4 citations
  5. 05

    [Submitted on 20 Sept 2016]

    Non-boost-invariant dissipative hydrodynamics

    Wojciech Florkowski🇵🇱 · Radoslaw Ryblewski🇵🇱 · Michael Strickland🇺🇸 · Leonardo Tinti🇵🇱

    The one-dimensional non-boost-invariant evolution of the quark-gluon plasma, presumably produced during the early stages of heavy-ion collisions, is analyzed within the frameworks of viscous and anisotropic hydrodynamics. We neglect transverse dynamics and assume homogeneous conditions in the transverse plane but, differently from Bjorken expansion, we relax longitudinal boost invariance in order to study the rapidity dependence of various hydrodynamical observables. We compare the results obtained using several formulations of second-order viscous hydrodynamics with a recent approach to anisotropic hydrodynamics, which treats the large initial pressure anisotropy in a non-perturbative fashion. The results obtained with second-order viscous hydrodynamics depend on the particular choice of the second-order terms included, which suggests that the latter should be included in the most complete way. The results of anisotropic hydrodynamics and viscous hydrodynamics agree for the central hot part of the system, however, they differ at the edges where the approach of anisotropic hydrodynamics helps to control the undesirable growth of viscous corrections observed in standard frameworks.

    Comments:
    11 pages, 6 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1609.06293 [pdf]
    PRC(2016)·21 citations

Affiliations

first authorsco-authorsvia INSPIRE