### Conveners

#### QCD phase diagram: 1

- Tetsuo Hatsuda (Unknown)

#### QCD phase diagram: 2

- Helen Louise Caines (Yale University (US))

#### QCD phase diagram: 3

- Alexander Sorin (Joint Inst. for Nuclear Research (RU))

Kai Schwenzer
(W)

20/05/2014, 09:00

New Theoretical Developments

Contributed Talk

Astrophysical observations of compact stars provide, in addition to collider experiments, the other big source of information on matter under extreme conditions. The largest and most precise data set about neutron stars is the timing data of radio pulsars. We show how this unique data can be used to learn about the ultra-dense matter in the compact star interior. The method relies on...

Feng Zhao
(University of California, Los Angeles)

20/05/2014, 09:20

QCD Phase Diagram

Contributed Talk

QCD allows for the formation of parity-odd domains inside the Quark-Gluon Plasma (QGP). The proposed Chiral Magnetic Effect (CME) will lead to charge separation with respect to the reaction plane. Previous measurements from RHIC and LHC using charge-dependent two-particle azimuthal correlations with respect to the reaction plane are consistent with the expectation of charge separation from...

Gergely Endrodi
(U)

20/05/2014, 09:40

QCD Phase Diagram

Contributed Talk

In this talk recent lattice QCD results are presented about the response of the thermal QCD vacuum to external (electro)magnetic fields. Characteristic features of this response include the reduction of the deconfinement transition temperature due to the magnetic field and the paramagnetic nature of the QCD vacuum as a medium. The latter results in a squeezing of the quark-gluon plasma if the...

Qi-Ye Shou
(SINAP, BNL)

20/05/2014, 10:00

QCD Phase Diagram

Contributed Talk

Theoretical studies [1] indicate that in relativistic heavy collisions a chiral magnetic wave at finite baryon density could induce an electric quadrupole moment, which will lead to a difference in elliptic flow of hadrons with opposite charge. The magnitude of this difference is predicted to be proportional to the charge asymmetry $A_\mathrm{ch}$, defined as $A_\mathrm{ch} \equiv \langle...

Toru Kojo
(Bielefeld University)

20/05/2014, 10:20

QCD Phase Diagram

Contributed Talk

It has been known that magnetic fields enhance the chiral symmetry breaking (ChSB). According to studies of QED or models of the 4-fermi interactions, it was expected that the enhanced ChSB would resist the chiral restoration effects, increasing critical temperatures for the chiral restoration and deconfinement. Recent lattice calculations, however, showed the opposite behavior: the critical...

Pasi Huovinen
(Johann Wolfgang Goethe-Universität)

20/05/2014, 14:20

QCD Phase Diagram

Contributed Talk

The effects of non-zero baryon density are expected to become
important in hydrodynamic modeling of heavy collisions below the
highest energy at RHIC. Recent calculations in effective models and in
QCD using Dyson Schwinger equation suggest that the transition in QCD
remains a crossover up to baryon chemical potentials of about 800MeV [1].
If so, the equation of state relevant for...

Prof.
Christian Fischer
(JLU Giessen)

20/05/2014, 14:40

QCD Phase Diagram

Contributed Talk

I review resent results on the chiral and deconfinement
transitions of QCD and the associated phase diagram obtained
from a combination of lattice results with the framework
of Dyson-Schwinger equations. At zero chemical potential we
find excellent agreement with existing lattice results. We
discuss the potential location of the critical endpoint for
Nf=2+1 and Nf=2+1+1 flavors and...

Dr
Ron Soltz
(Lawrence Livermore Nat. Laboratory (US))

20/05/2014, 15:00

QCD Phase Diagram

Contributed Talk

The Beam Energy Scan (BES) program at RHIC has shown the flexibility
to vary the beam energy per nucleon by more than an order of
magnitude, down to the equivalent $\sqrt{s_{NN}}$ of SPS fixed-target
collisions and below. This allows the RHIC experiments to
systematically track the evolution of excited nuclear matter as it
crosses the QGP transition, and to explore new physics at...

Dr
Manuel Lorenz
(GU Frankfurt)

20/05/2014, 15:20

QCD Phase Diagram

Contributed Talk

Data on particle production in heavy ion collisions in the energy regime of 1-2 A GeV have been collected over almost three decades now. As most of the newly created hadrons are produced below or slightly above their free NN-thresholds, data are usually interpreted with the help of phenomenological models, rather than comparing to elementary reference measurements. Driven by advance in...

Ralf-Arno Tripolt
(TU Darmstadt)

20/05/2014, 15:40

QCD Phase Diagram

Contributed Talk

We present a new method to obtain real-time quantities
such as spectral functions and transport coefficients
at finite temperature and density using a
non-perturbative Functional Renormalization Group approach [1].
Our method is based on a thermodynamically consistent truncation of the
flow equations for 2-point functions with analytically continued frequency
components in the...

AMAL SARKAR
(iit-bombay)

21/05/2014, 11:10

Correlations and Fluctuations

Contributed Talk

The main goal of the Beam Energy Scan (BES) program at RHIC is to map the
phase diagram of QCD. A critical point (CP) is expected at large baryonic
chemical potential ($\mu_{B}$) in the $T$ vs. $\mu_{B}$ phase diagram. Its
location experimentally will provide one of the most stringent tests of
QCD calculations. In the BES program $T$ and $\mu_{B}$ are varied by
changing the center of...

Claudia Ratti

21/05/2014, 11:30

QCD at High Temperature and/or Density

Contributed Talk

Recent results for moments of multiplicity distributions of net-protons
and net-electric charge from the Star collaboration are compared to recent
lattice QCD results for higher order fluctuations of baryon number and
electric charge by the Wuppertal-Budapest collaboration. All lattice
simulations are performed at the physical mass for light and strange
quarks; all results are continuum...

Dr
Xiaofeng Luo
(Central China Normal University)

21/05/2014, 11:50

QCD Phase Diagram

Contributed Talk

Experimental confirmation of the QCD critical point is an excellent test of QCD theory in the non-perturbative region and a milestone of exploring the QCD phase diagram. It is one of the main goals of the RHIC Beam Energy Scan (BES) program. Due to the high sensitivity to the correlation length [1] of the dynamical system and directly connected to the susceptibilities in theoretical...

Dr
Marcus Bluhm
(North Carolina State University)

21/05/2014, 12:10

QCD Phase Diagram

Contributed Talk

Fluctuations in the conserved charges of the strong interaction are important probes in high-energy heavy-ion collisions, which provide an excellent opportunity for revealing details in the phase structure of QCD matter. Recently, net-electric charge and net-proton fluctuations measured in the beam energy scan program at RHIC were reported by the STAR collaboration. In this talk, we present a...

Christian Schmidt
(University of Bielefeld)

21/05/2014, 12:30

QCD Phase Diagram

Contributed Talk

Higher order cumulants of fluctuations of conserved charges are an important diagnostic tool for the thermodynamic properties of strong interacting matter close to freeze out [1] at LHC energies as well as in the entire energy range covered with the beam energy scan (BES) at RHIC. We present recent progress on the calculation of conserved charge fluctuations with highly improved staggered...

Atsushi Nakamura
(Hiroshima Univ)

21/05/2014, 12:50

QCD Phase Diagram

Contributed Talk

We report a new way to extract the QCD phase transition from the net
baryon multiplicity. The method provides us not only a freeze-out temperature-
density point, but also the neighbour of the point. In other words, Beam Energy Scan
explores not only points, but also regions with the finite spreads in $\mu$-$T$
plane, where $\mu$ is the chemical potential, and $T$ is the...

Tetsufumi Hirano
(Sophia Univ)

21/05/2014, 13:10

New Theoretical Developments

Contributed Talk

We discuss multiplicity fluctuation
caused by noises during hydrodynamic evolution of the quark-gluon fluid
created in high-energy nuclear collisions.
In this talk, we claim the following non-trivial consequences within a framework of relativistic fluctuating hydrodynamics [1]:
- Multiplicity (being approximately proportional to entropy) fluctuates
from event to event
due to...