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Nuclear Theory·nucl-th

Tuesday·October 4, 2016

13 papers—10 primary·3 cross-listed

All13Primary10Cross-lists3
  1. 11

    SU(2N_F) symmetry of QCD at high temperature and its implications

    L. Ya. Glozman🇦🇹

    If above a critical temperature not only the SU(N_F)_L \times SU(N_F)_R chiral symmetry of QCD but also the U(1)_A symmetry is restored, then the actual symmetry of the QCD correlation functions and observables is SU(2N_F). Such a symmetry prohibits existence of deconfined quarks and gluons. Hence QCD at high temperature is also in the confining regime and elementary objects are SU(2N_F) symmetric "hadrons" with not yet known properties.

    ↳ hep-lathep-phhep-thnucl-thActa Phys.Polon.Supp.(2017)·21 citations
  2. 12

    Vector meson condensation in a pion superfluid

    Tomas Brauner🇳🇴 · Xu-Guang Huang🇨🇳

    We revisit the suggestion that charged rho-mesons undergo Bose-Einstein condensation in isospin-rich nuclear matter. Using a simple version of the Nambu-Jona-Lasinio (NJL) model, we conclude that rho-meson condensation is either avoided or postponed to isospin chemical potentials much higher than the rho-meson mass as a consequence of the repulsive interaction with the preformed pion condensate. In order to support our numerical results, we work out a linear sigma model for pions and rho-mesons, showing that the two models lead to similar patterns of medium dependence of meson masses. As a byproduct, we analyze in detail the mapping between the NJL model and the linear sigma model, focusing on conditions that must be satisfied for a quantitative agreement between the models.

    ↳ hep-phhep-thnucl-thPRD(2016)·26 citations
  3. 13

    The first moment of azimuthal anisotropy in nuclear collisions from AGS to LHC energies

    Subhash Singha🇺🇸 · Prashanth Shanmuganathan🇺🇸 · Declan Keane🇺🇸

    We review topics related to the first moment of azimuthal anisotropy (), commonly known as directed flow, focusing on both charged particles and identified particles from heavy-ion collisions. Beam energies from the highest available, at the CERN LHC, down to projectile kinetic energies per nucleon of a few GeV per nucleon, as studied in experiments at the Brookhaven AGS, fall within our scope. We focus on experimental measurements and on theoretical work where direct comparisons with experiment have been emphasized. The physics addressed or potentially addressed by this review topic includes the study of Quark Gluon Plasma, and more generally, investigation of the Quantum Chromodynamics phase diagram and the equation of state describing the accessible phases.

    ↳ nucl-exhep-exhep-phnucl-thAdv.High Energy Phys.(2016)·40 citations

Affiliations

first authorsco-authorsvia INSPIRE