QM 2011 - XXII International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

Session

Energy scan

Parallel Session 5-4

27 May 2011, 17:30

Théâtre National (Centre Bonlieu)

Conveners

Energy scan

• Gunther Roland (MIT)

297. Identified hadron production from the RHIC beam energy scan program in the STAR experiment

Dr lokesh kumar (Kent State University)

27/05/2011, 17:30

Hadron thermodynamics and chemistry

Parallel

A current focus at RHIC is the Beam Energy Scan (BES) program to study the QCD phase diagram --- temperature ($T$) vs. baryon chemical potential ($\mu_B$). The BES program aims to verify some predictions from QCD: that a cross-over occurs at $\mu_B$ = 0, and that there exists a first-order phase transition at large $\mu_B$ and a critical point at an intermediate $\mu_B$. The spectra and ratios...

510. Collision energy dependence of the flow and spectra results in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7-200 GeV from PHENIX

Xiaoyang Gong (Stony Brook University)

27/05/2011, 17:50

Global and collective dynamics

Parallel

A central goal in experimental nuclear physics is to map out the QCD phase diagram, and to measure precisely the properties of the different phases. In order to achieve this goal, RHIC has embarked on an energy scan program involving gold nuclei at various energies. The data collected by the PHENIX experiment for this program consists of data sets obtained at $\sqrt{s_{NN}}$ = 200, 62, 39 and...

412. QCD critical point and event-by-event fluctuations

Prof. Misha Stephanov (UIC)

27/05/2011, 18:10

QCD phase diagram

Parallel

Observables measuring the magnitude and non-Gaussianity of event-by-event fluctuations can be used to discover the QCD critical point in heavy-ion collisions. I shall describe theoretical predictions for the non-Gaussian measures such as skewness, kurtosis and corresponding mixed moments as a function of the beam energy in the presence of the QCD critical point. I shall discuss implications...

300. Energy dependence of the freeze out eccentricity from azimuthal dependence of HBT at STAR

Christopher Anson (The Ohio State University)

27/05/2011, 18:30

Correlations and fluctuations

Parallel

Non-central heavy ion collisions at RHIC create an anisotropic participant zone of QCD matter under extreme conditions of energy and matter density. While this zone is initially out-of-plane-extended, pressure gradients cause the hot, dense medium to expand preferentially in plane. Over time, this expansion makes the shape more spherical, perhaps even becoming extended in the in-plane...

512. Energy dependence of energy loss in Au+Au collisions at PHENIX

Norbert Novitzky (Department of Physics-University of Jyvaskyla)

27/05/2011, 18:50

Jets

Parallel

The suppression of inclusive pion production by up to a factor of 5, which was first observed in Au + Au at √sNN= 130 GeV/c (e.g. [1]) and later in Au + Au at √sNN= 200 GeV/c [2, 3], is one of the most significant manifestations of the opaque QGP produced in heavy ion collisions. The absence of this suppression in d + Au collisions at the same energy indicates the final state nature of the...

532. Net-baryon-, net-proton-, and net-charged particle kurtosis in heavy-ion collisions within a relativistic transport approach

Marlene Nahrgang (Goethe University Frankfurt and Frankfurt Institute for Advanced Studies (FIAS))

27/05/2011, 19:10

QCD phase diagram

Parallel

We explore the potential of net-baryon, net-proton and net-charge kurtosis measurements to investigate the properties of hot and dense matter created in relativistic heavy-ion collisions. Contrary to calculations in a grand canonical ensemble we explicitly take into account exact electric and baryon charge conservation on an event-by-event basis. This drastically limits the width of...