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Nuclear Theory·nucl-th

Friday·January 25, 2019

6 papers—3 primary·3 cross-listed

All6Primary3Cross-lists3
  1. 01

    Hybrid Hadronization

    Rainer J. Fries🇺🇸 · Michael Kordell🇺🇸

    We discuss Hybrid Hadronization, a hadronization model which interpolates between string fragmentation in dilute parton systems and quark recombination in dense parton systems. We lay out the basic principles, discuss some details of the implementation, and show some prelimiary results. Hybrid Hadronization is realized as a software package which works with PYTHIA 8 and will be released publicly in the near future.

    nucl-thhep-phPoS(2019)·10 citations
  2. 02

    Strangeness Enhancement in p+p, p+Pb and Pb+Pb Collisions at LHC Energies

    Y. Kanakubo🇯🇵 · M. Okai🇯🇵 · Y. Tachibana🇺🇸 · T. Hirano🇯🇵

    We investigate whether the quark gluon plasma (QGP) is created in small colliding systems from analyses of various hadron yields and their ratios in proton-proton (p+p), proton-lead (p+Pb) and lead-lead (Pb+Pb) collisions at LHC energies. Recently, the ALICE Collaboration reports enhancement of yield ratio of multi-strange hadrons to charged pions as a function of multiplicity at mid-rapidity. Motivated by these results, we develop the dynamical core-corona initialization framework and find that our results describe tendencies of the ALICE data especially for multi-strange hadrons. These results indicate that the QGP is partly formed in high multiplicity events in small colliding systems.

    nucl-thhep-phnucl-exJPS Conf.Proc.(2019)·3 citations
  3. 03

    Relativistic dissipation obeys Chapman-Enskog asymptotics: analytical and numerical evidence as a basis for accurate kinetic simulations

    A. Gabbana · D. Simeoni · S. Succi · R. Tripiccione

    We present an analytical derivation of the transport coefficients of a relativistic gas in (2+1) dimensions for both Chapman-Enskog (CE) asymptotics and Grad's expansion methods. Moreover, we develop a systematic calibration method, connecting the relaxation time of relativistic kinetic theory to the transport parameters of the associated dissipative hydrodynamic equations. Comparison between the analytical results and numerical simulations, shows that the CE method correctly captures dissipative effects, while Grad's method does not. The resulting calibration procedure based on the CE method opens the way to the quantitative kinetic description of dissipative relativistic fluid dynamics under fairly general conditions, namely flows with strongly non-linearities, in non-ideal geometries, across both ultra-relativistic and near-non-relativistic regimes.

    nucl-thphysics.comp-phphysics.flu-dynPRE(2019)·8 citations

Affiliations

first authorsco-authorsvia INSPIRE