Elliptic flow in transport theory and hydrodynamics

We present a new direct simulation Monte-Carlo method for solving the relativistic Boltzmann equation. We solve numerically the 2-dimensional Boltzmann equation using this new algorithm. We find that elliptic flow from this transport calculation smoothly converges towards the value from ideal hydrodynamics as the number of collisions per particle increases, as expected on general theoretical grounds, but in contrast with previous transport calculations.Comment: 5 pages, 3 figures, revise

Equation of state of the hot dense matter in a multi-phase transport model

Within the framework of a multi-phase transport model, we study the equation of state and pressure anisotropy of the hot dense matter produced in central relativistic heavy ion collisions. Both are found to depend on the hadronization scheme and scattering cross sections used in the model. Furthermore, only partial thermalization is achieved in the produced matter as a result of its fast expansion

Anisotropic flow far from equilibrium

We compute analytically the anisotropic flow in an expanding mixture of several species of relativistic massive particles. We find that a single collision per particle in average already leads to sizable elliptic flow, with mass ordering between the species.Comment: 13 pages, 7 figures. v2: journal version (a few typos corrected, extra acknowledgments added

Dissipative corrections to particle spectra and anisotropic flow from a saddle-point approximation to kinetic freeze out

Lang C, Borghini N. Dissipative corrections to particle spectra and anisotropic flow from a saddle-point approximation to kinetic freeze out. The European Physical Journal C. 2014;74(7): 2955.A significant fraction of the changes in momentum distributions induced bydissipative phenomena in the description of the fluid fireball created inultrarelativistic heavy ion collisions are actually taking place when the fluidturns into individual particles. We study these corrections in the limit of alow freeze-out temperature of the flowing medium, and show that they mostlyaffect particles with a higher velocity than the fluid. For these, we deriverelations between different flow harmonics, from which the functional form ofthe dissipative corrections could ultimately be reconstructed from experimentaldata

Estimates of hadron azimuthal anisotropy from multiparton interactions in proton-proton collisions at sqrt(s) = 14 TeV

We estimate the amount of collective "elliptic flow" expected at mid-rapidity in proton-proton (p-p) collisions at the CERN Large Hadron Collider (LHC), assuming that any possible azimuthal anisotropy of the produced hadrons with respect to the plane of the reaction follows the same overlap-eccentricity and particle-density scalings as found in high-energy heavy ion collisions. Using a Glauber eikonal model, we compute the p-p eccentricities, transverse areas and particle-multiplicities for various phenomenological parametrisations of the proton spatial density. For realistic proton transverse profiles, we find integrated elliptic flow v2 parameters below 3% in p-p collisions at sqrt(s) = 14 TeV.Comment: 17 pages, 9 figures. Very minor mods. Version to appear in EPJ-

Anisotropic flow in Pb+Pb collisions at LHC from the quark gluon string model with parton rearrangement

We present predictions for the pseudorapidity dependence of the azimuthal anisotropy parameters v_1 and v_2 of baryons and inclusive charged hadrons in Pb+Pb collisions at a LHC energy of sqrt(s) = 5.5 TeV applying a microscopic transport model, namely the quark gluon string model (QGSM) which has been recently extended for parton rearrangement and fusion processes. Pb+Pb collisions with impact parameters b = 2.3 fm and b = 8 fm have been simulated in order to investigate additionally the difference between central and semiperipheral configurations. In contrast to v_1(eta) at RHIC, the directed flow of charged hadrons shows a small normal flow alignment. The elliptic flow v_2(eta) turns out to be rather similar in shape for RHIC and LHC conditions, the magnitude however increases about 10-20 % at the LHC, leading to the conclusion that the hydrodynamical limit will be reached.Comment: 6 pages, 4 figures, accepted for publication in Phys. Lett.

Heavy quarkonia in a medium as a quantum dissipative system: Master-equation approach

The problem of the evolution of a heavy quarkonium in a medium can be recast as that of a quantum dissipative system. Within the framework of the master-equation approach to open quantum systems, we consider the real-time dynamics of quarkonia. We find that in a plasma at fixed temperature, the populations of the various quarkonium states evolve together, while their momentum distribution satisfies a Fokker-Planck equation.Comment: 12 pages, 8 figures. Version 2 matches the published versio

Feasibility of encouraging participation in colorectal cancer screening campaigns by motivating people through the social network, Facebook

International audienc

From The Black Society to The Isle: Miike Takashi and Kim Ki-Duk at the intersection of Asia Extreme

Miike Takashi and Kim Ki-Duk are established figures at the forefront of the Asia Extreme movement. Despite the superficial associations between the two film-makers and the pan-Asian faux-genre of extreme cinema, there are a number of connections that link Miike and Kim as artists beyond the violent or potentially misogynist content of some of their films. While critical reactions to both filmmakers make a case for the location of both squarely in the realms of the Asian Extreme mainstream, textual features see both subscribing to characteristics that can be located within key South-East Asian concerns of national identity and gender (despite Miike and Kim's specific positioning within their respective national characteristics). Paying close attention to the national positioning of both filmmakers, as well as to their transnational, western reception, this article argues that, within the boundaries of separate and distinct national identities, Miike and Kim both explore similar themes of fractured identity, cultural dislocation, gender and the failures of language. Through close analysis of Miike's Black Society (kuroshakai) trilogy (1995, 1997, 1999) and Kim's The Isle/Seom (2000) and Bad Guy/Nabbeun namja (2001), the article explores the transnational meaning and stylization that link these two significant film-makers beyond the limits of the Asia Extreme discourse