Critical Point and Onset of Deconfinement 2016

Session

Parallel session 1

30 May 2016, 14:00

336 lecture Hall (University of Wrocław)

1. Existence of the critical endpoint in the vector meson extended linear sigma model

Gyorgy Wolf (Wigner FK)

30/05/2016, 14:00

Talk

In the framework of an SU(3) (axial)vector meson extended linear sigma model with additional constituent quarks and Polyakov loops, we investigate the effects of (axial)vector mesons on the chiral phase transition. The parameters of the Lagrangian are set at zero temperature and we use a hybrid approach where in the effective potential the constituent quarks are treated at one-loop level and...

16. Cumulative production of pions by heavy baryonic resonances in proton-nucleus collisions

Anton Motornenko (Taras Shevchenko National University of Kyiv)

30/05/2016, 14:30

Talk

Pion production in the backward direction in the target rest frame is considered

in proton-nucleus (p+A) collisions. Pions outside the kinematical boundary of

proton-nucleon (p+N) collisions, the so called cumulative effect, is studied.

Basic restrictions on the energy of pions emitted in the backward direction in

p+N and p+A reactions are considered. These are restrictions that follow...

46. Repulsive interactions and their effects on the thermodynamics

Pok Man Lo (GSI)

30/05/2016, 15:00

Talk

In this talk we compare two approaches in modeling repulsive interactions among hadrons: the excluded-volume approximation and the S-matrix formalism. The latter provides a consistent treatment of broad resonances based on empirical scattering phase shifts. We shall apply these techniques to study the thermodynamics of the (πN∆) system, with a particular focus on the fluctuation of Baryon...

15. Charm diffusion coefficent from nonzero momentum Euclidean correlator in temporal channel

Atsuro Ikeda (Osaka University)

30/05/2016, 16:00

Talk

We study a charm quark diffusion coefficient with nonzero momentum
correlator on the quenched lattice. Starting from rather general requirements on the spectral function, we derive inequalities to constrain the value of the diffusion coefficient. These inequalities have quantities which can be measured on the lattice
from temporal correlator with nonzero momentum. Using the inequalities and...

31. Critical fluctuations in models with van der Waals interactions

Volodymyr Vovchenko

30/05/2016, 16:30

Talk

Particle number fluctuations are considered within the full van der Waals (VDW) equation,
which contains both attractive (mean-field) and repulsive (eigenvolume) interactions.
Two steps to extend the VDW equation and make it appropriate for new physical applications are carried out:
(i) the grand canonical ensemble (GCE) formulation which allows to calculate the particle number fluctuations,...

29. Novel picture of the soft modes at the QCD critical point based on the FRG method

Takeru Yokota (Kyoto University, Japan)

30/05/2016, 17:00

Talk

One of remarkable features in the expected structure of the QCD phase diagram is the existence of QCD critical point (CP), which is the end point of the phase boundary of the first-order between the hadronic phase and the QGP phase. At the CP, the phase transition becomes second order, and thus there should be gapless and long-life modes called the soft modes, which govern the low-energy...

110. Chiral symmetry breaking in continuum QCD

Mario Mitter (Univ. Heidelberg)

30/05/2016, 17:30

Talk

Model parameter free investigations of Yang-Mills theory and quenched QCD in the vacuum are presented as a necessary prerequisitve for corresponding investigations of the QCD phase structure with the functional renormalisation group equation. Preliminary results for Yang-Mills theory at finite temperature are discussed. Finally, a phenomenological application of the vacuum results to the...

83. How to use Lattice and Experimental data for QCD Critical Point Search

Atsushi Nakamura (Hiroshima Univ)

02/06/2016, 14:00

Talk

41. Evaluation of the Motion of confined Particles

David Miller (Penn State), Dirk Rollmann (Bielefeld University)

02/06/2016, 14:30

Talk

We carry out numerical evaluations of the motion of classical particles in Minkowski space ${\cal{M}}^4$ which are confined to the inside of a bag. In particular, we analyze the structure of the paths evolving from the breaking of the dilatation symmetry, the conformal symmetry and the combination of both together. The confining forces arise directly from the corresponding nonconserved...

42. Particle production in nucleus-nucleus and pion-nucleus collisions at $E_\text{kin} = 0.8 - 2 A\,\text{GeV}$

Vinzent Steinberg

02/06/2016, 15:00

Talk

SMASH is a new hadronic transport model designed to describe the non-equilibrium evolution of heavy-ion collisions. After a brief introduction to the model, it will be shown that SMASH correctly reproduces the cross sections and maintains detailed balance. First comparisons to pion spectra measured by FOPI and HADES will be presented, demonstrating that the energy deposition and transverse...

48. Across deconfinement transition

Claudio Bonati (University of Pisa)

03/06/2016, 14:00

Talk

The deconfinement transition at vanishing chemical potential can be reliably studied by lattice simulations and its general features are by now well known. On the contrary, what happens at finite density is still largely unknown and in this talk I will review the results obtained in the last year regarding the dependence, for small density, of the (pseudo)critical temperature on the baryonic...

80. Searching for the QCD critical point through power-law fluctuations of the proton density in heavy ion collisions

Nikolaos Davis (Polish Academy of Sciences (PL))

03/06/2016, 14:30

Talk

122. Critical Phenomena in the Nonextensive Nambu Jona-Lasinio Model

Jacek Rożynek (NCBJ Warsaw Poland)

03/06/2016, 15:00

Talk

We present a thermodynamical analysis of the nonextensive, QCD-based, Nambu - Jona-Lasinio model (NJL) of strongly interacting matter in the critical region. It is based on the nonextensive generalization of the Boltzmann-Gibbs (BG) statistical mechanics, used in the NJL model, to its nonextensive version. This can be introduced in different ways, depending on different possible choices of the...

49. Dynamical gap generation in graphene with frequency dependent renormalization effects

Margaret Carrington (Brandon University)

03/06/2016, 16:00

Talk

In recent years there has been much interest in the study of graphene, which is a 2-dimensional crystal of carbon atoms that exhibits many interesting electronic properties and quantum effects. The dynamical generation of a gap would cause the system to undergo a phase transition to an insulating state. From a technological point of view, a finite gap would make graphene more promising as a...

51. Field-particle dynamics for the kinetics of the chiral phase transition

Hendrik van Hees (Goethe University Frankfurt)

03/06/2016, 16:30

Talk

We simulate the kinetics of the chiral phase transition in hot and dense
strongly interacting matter within a novel kinetic-theory approach. Employing
an effective linear $\sigma$ model for quarks, $\sigma$ mesons, and
pions we treat the quarks within a test-particle ansatz for solving the
Boltzmann transport equation and the mesons in terms of classical
fields. The decay-recombination...

56. Symmetry breaking effect on the inhomogeneous chiral phase in the external magnetic field

Ryo Yoshiike (Kyoto university)

03/06/2016, 17:00

Talk

The existence of the inhomogeneous chiral phase, where the chiral condensate is spatially modulated has been discussed from some effective model analysis.
The phase seems to emerge in compact stars because it appears around the conventional chiral phase transition line in the QCD phase diagram.
Assuming an inhomogeneous configuration called "dual chiral density wave (DCDW)", where both scalar...

134. Relaxation rates and phase transitions

Jakub Jankowski (Jagiellonian University)

03/06/2016, 17:30

Talk

Using a bottom-up gauge gravity constructions, relaxation rates of strongly coupled field theories are computed. A variety of phase structures are considered, from a crossover up to a first order phase transition. It is established that near the transition the applicability of a hydrodynamic description breaks down at lower momenta than in the conformal case. In the case of the first order...