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Nuclear Theory·nucl-th

Friday·March 24, 2017

6 papers—3 primary·3 cross-listed

All6Primary3Cross-lists3
  1. 01

    Heavy quark dynamics within a Boltzmann transport model: radiative vs collisional energy loss

    G. Coci (1 and 2)🇮🇹 · F. Scardina (2)🇮🇹 · V. Greco (1 and 2) ((1) University of Catania Department of Physics and Astronomy (2) INFN Laboratori Nazionali del Sud)🇮🇹

    We discuss the propagation of heavy quarks (charm and bottom) through the QGP by means of a relativistic Boltzmann transport approach including both collisional and radiative energy loss mechanisms. In particular we investigate the impact of induced gluon radiation by dynamical QCD medium implementing in our transport model a formula for the emitted gluon spectrum calculated in a higher-twist scheme. We notice that in the region of high transverse momentum ( GeV) radiative processes play an essential role giving a dominant contribution to the generation of and at momentum values for which the energy loss by collisions is in the perturbative regime.

    nucl-thJ.Phys.Conf.Ser.(2017)·2 citations
  2. 02

    Three-body bound states with zero-range interaction in the Bethe-Salpeter approach

    E. Ydrefors🇧🇷 · J. H. Alvarenga Nogueira🇧🇷 · V. Gigante🇧🇷 · T. Frederico🇧🇷 · V.A. Karmanov🇷🇺

    The Bethe-Salpeter equation for three bosons with zero-range interaction is solved for the first time. For comparison the light-front equation is also solved. The input is the two-body scattering length and the outputs are the three-body binding energies, Bethe-Salpeter amplitudes and light-front wave functions. Three different regimes are analyzed: ({\it i}) For weak enough two-body interaction the three-body system is unbound. ({\it ii}) For stronger two-body interaction a three-body bound state appears. It provides an interesting example of a deeply bound Borromean system. ({\it iii}) For even stronger two-body interaction this state becomes unphysical with a negative mass squared. However, another physical (excited) state appears, found previously in light-front calculations. The Bethe-Salpeter approach implicitly incorporates three-body forces of relativistic origin, which are attractive and increase the binding energy.

    nucl-thhep-phPLB(2017)·15 citations
  3. 03

    Dynamical evolution of critical fluctuations and its observation in heavy ion collisions

    Miki Sakaida🇯🇵 · Masayuki Asakawa🇯🇵 · Hirotsugu Fujii🇯🇵 · Masakiyo Kitazawa🇯🇵

    We study time evolution of critical fluctuations of conserved charges near the QCD critical point in the context of relativistic heavy ion collisions. A stochastic diffusion equation is employed in order to describe the diffusion property of the critical fluctuation arising from the coupling of the order parameter field to conserved charges. We show that the diffusion property gives rise to a possibility of probing the early time fluctuations through the rapidity window dependence of the second-order cumulant and correlation function of conserved charges. It is pointed out that their non-monotonic behaviors as functions of the rapidity interval are robust experimental signals for the existence of the critical enhancement around the QCD critical point.

    nucl-thhep-phnucl-exPRC(2017)·44 citations

Affiliations

first authorsco-authorsvia INSPIRE