The effect of quark coalescence on conical signals (2009)
Greco, Vincenzo, Torrieri, Giorgio, Noronha, Jorge, Gyulassy, Miklos
We explore the effect of hadronization by partonic coalescence on a "conical" signal at the partonic level. We show that, by transferring partons from a lower to a higher $p_T$, coalescence makes the...
Conical Correlations, Bragg Peaks, and Transverse Flow Deflections in Jet Tomography (2009)
Betz, Barbara, Noronha, Jorge, Torrieri, Giorgio, Gyulassy, Miklos, Rischke, Dirk H.
We use (3+1)-dimensional ideal hydrodynamics to describe a variety of different jet energy loss scenarios for a jet propagating through an opaque medium. The conical correlations obtained for fully...
The use of Kolmogorov-Smirnov test in event-by-event analysis (2009)
Tomasik, Boris, Melo, Ivan, Torrieri, Giorgio, Vogel, Sascha, Bleicher, Marcus
We propose to use the Kolmogorov-Smirnov test to uncover non-statistical differences between events created in heavy ion collisions within the same centrality class. The advantage of the method over...
Constraints on AdS/CFT Gravity Dual Models of Heavy Ion Collisions (2009)
Noronha, Jorge, Gyulassy, Miklos, Torrieri, Giorgio
We show that the five-fold constraints due to (1) the observed nuclear modification of heavy quark jets measured via non-photonic electrons $R_{AA}^e(p_T \sim 6 {\rm GeV})$ in central Au+Au...
Hauer, Michael, Torrieri, Giorgio, Wheaton, Spencer
Multiplicity fluctuations and correlations are calculated within thermalized relativistic ideal quantum gases. These are shown to be sensitive to the choice of statistical ensemble as well as to the...
The Kolmogorov-Smirnov test and its use for the identification of fireball fragmentation (2009)
Melo, Ivan, Tomasik, Boris, Torrieri, Giorgio, Vogel, Sascha, Bleicher, Marcus, Korony, Samuel, ...
We propose an application of the Kolmogorov-Smirnov test for rapidity distributions of individual events in ultrarelativistic heavy ion collisions. The test is particularly suitable to recognise...
Phenomenology of Strangeness enhancement in heavy ion collisions (2009)
We give an overview of the phenomenology of strangeness enhancement in heavy ion collisions, within the paradigm of the statistical model of particle production. We argue that, while strangeness...
Bulk viscosity-driven freeze-out in heavy ion collisions (2009)
Torrieri, Giorgio, Mishustin, Igor, Tomášik, Boris
We give an review the HBT puzzle, and argue that its resolution requires the introduction of new physics close to the phase transition scale. We argue that a candidate for this new physics is bulk...
Mach cones in heavy ion collisions (2009)
Torrieri, Giorgio, Betz, Barbara, Noronha, Jorge, Gyulassy, Miklos
We study the fate of the energy deposited by a jet in a heavy ion collision assuming that the medium created is opaque (jets quickly lose energy) and its viscosity is so low that the energy lost by...
Betz, Barbara, Noronha, Jorge, Torrieri, Giorgio, Gyulassy, Miklos, Mishustin, Igor, Rischke, Dirk H.
We solve (3+1)-dimensional ideal hydrodynamical equations with source terms that describe punch-through and fully stopped jets in order to compare their final away-side angular correlations in a...
Jet Energy Loss and Mach Cones in pQCD vs. AdS/CFT (2008)
Betz, Barbara, Noronha, Jorge, Gyulassy, Miklos, Torrieri, Giorgio
We compare away-side hadron correlations with respect to tagged heavy quark jets computed within a weakly coupled pQCD and a strongly coupled AdS/CFT model. While both models feature similar far zone...
Anomalous Conical Di-jet Correlations in pQCD vs AdS/CFT (2008)
Betz, Barbara, Gyulassy, Miklos, Noronha, Jorge, Torrieri, Giorgio
We propose an observable to discriminate between weakly coupled pQCD and strongly coupled AdS/CFT models of quark gluon plasma dynamics in ultra-relativistic nuclear collisions at RHIC and LHC...
Conical Di-jet Correlations from a Chromo-Viscous Neck in AdS/CFT (2008)
Gyulassy, Miklos, Noronha, Jorge, Torrieri, Giorgio
We show that Mach-like correlations from heavy quark jets in the Gubser et al AdS/CFT string drag model arise not from the expected (weak) hydrodynamical Mach sound wakes zone but from a near...
Noronha, Jorge, Gyulassy, Miklos, Torrieri, Giorgio
We show that far zone Mach and diffusion wake ``holograms'' produced by supersonic strings in anti--de Sitter space/conformal field theory (AdS/CFT) correspondence do not lead to observable conical...
Near Zone Hydrodynamics of AdS/CFT Jet Wakes (2008)
Noronha, Jorge, Gyulassy, Miklos, Torrieri, Giorgio
The energy-momentum tensor of a supersonic heavy quark jet moving through a strongly-coupled $\mathcal{N}=4$ SYM plasma is analyzed in terms of first-order Navier-Stokes hydrodynamics. We focus on...
Instability of Boost-invariant hydrodynamics with a QCD inspired bulk viscosity (2008)
Torrieri, Giorgio, Mishustin, Igor
We solve the relativistic Navier-Stokes equations with homogeneous boost-invariant boundary conditions, and perform a stability analysis of the solution. We show that, if the bulk viscosity has a...
Jet Propagation and Mach Cones in (3+1)d Ideal Hydrodynamics (2008)
Betz, Barbara, Gyulassy, Miklos, Rischke, Dirk H., Stöcker, Horst, Torrieri, Giorgio
The observation of jet quenching and associated away--side Mach cone--like correlations at RHIC provide powerful ``external'' probes of the sQGP produced in A+A reactions, but it simultaneously...
Freeze-out by bulk viscosity driven instabilities (2008)
Torrieri, Giorgio, Tomášik, Boris, Mishustin, Igor
We describe a new scenario (first introduced in [G. Torrieri, B. Tom\'a\v{s}ik and I. Mishustin, Phys. Rev. C \textbf{77}, 034903 (2008)]) for freezeout in heavy ion collisions that could solve the...
Noronha, Jorge, Torrieri, Giorgio, Gyulassy, Miklos
The near zone energy-momentum tensor of a supersonic heavy quark jet moving through a strongly-coupled $\mathcal{N}=4$ SYM plasma is analyzed in terms of first-order Navier-Stokes hydrodynamics. It...
Fragmentation of the fireball and how to observe it (2007)
Tomasik, Boris, Melo, Ivan, Torrieri, Giorgio, Mishustin, Igor, Bartos, Pavol, Gintner, Mikulas, ...
We argue that fragmentation at hadronisation is likely scenario in ultrarelativistic nuclear collisions. In case of crossover phase transition it is driven by a singularity of the bulk viscosity. We...
Fluctuations of particle ratios as a freeze-out probe (2007)
We explain how event-by-event fluctuations of particle ratios can constrain and falsify the statistical model of particle production in heavy ion collisions, using $K/\pi$ fluctuations as an example....
What can we learn from fluctuations of particle ratios? (2007)
We explain how fluctuations of ratios can constrain and falsify the statistical model of particle production in heavy ion collisions, using $K/\pi$ fluctuations as an example. We define an observable...
Polarization probes of vorticity in heavy ion collisions (2007)
Betz, Barbara, Gyulassy, Miklos, Torrieri, Giorgio
We discuss the information that can be deduced from a measurement of particle (hyperon or vector meson) polarization in ultrarelativistic nuclear collisions. We describe the sensitivity of...
Torrieri, Giorgio, Tomasik, Boris, Mishustin, Igor
We introduce a new scenario for heavy ion collisions that could solve the lingering problems associated with the so-called HBT puzzle. We postulate that the system starts expansion as the perfect...
Elliptic flow fluctuations in heavy ion collisions at RHIC and the perfect liquid hypothesis (2007)
Vogel, Sascha, Torrieri, Giorgio, Bleicher, Marcus
We analyse the recently measured $v_2$ fluctuation in the context of establishing the degree of fluidity of the matter produced in heavy ion collisions. We argue that flow observables within systems...
A statistical model analysis of $K/\pi$ fluctuations in heavy ion collisions (2007)
We briefly describe two statistical hadronization models, based respectively on the presence and absence of light quark chemical equilibrium, used to analyze particle yields in heavy ion collisions....
Resonances and fluctuations at SPS and RHIC (2007)
We perform an analysis of preliminary data on hadron yields and fluctuations within the Statistical hadronization ansatz. We describe the theoretical disagreements between different statistical...
Scaling of $v_2$ in heavy ion collisions (2007)
We interpret the scaling of the corrected elliptic flow parameter w.r.t. the corrected multiplicity, observed to hold in heavy ion collisions for a wide variety of energies and system sizes. We use...
Centrality Dependence of Bulk Fireball Properties at RHIC (2006)
Rafelski, Johann, Letessier, Jean, Torrieri, Giorgio
We explore the centrality dependence of properties of the dense hadronic matter created in \sqrt{s_{NN}}=200 GeV Au--Au collisions at RHIC. Using the statistical hadronization model we fit particle...
SHARE: Statistical Hadronization with Resonances (2006)
Torrieri, Giorgio, Steinke, Steve, Broniowski, Wojciech, Florkowski, Wojciech, Letessier, Jean, Rafelski, Johann
SHARE is a collection of programs designed for the statistical analysis of particle production in relativistic heavy-ion collisions. With the physical input of intensive statistical parameters, it...
Statistical hadronization with resonances (2006)
Torrieri, Giorgio, Letessier, Jean, Rafelski, Johann, Steinke, Steve
We introduce the equilibrium and non-equilibrium statistical hadronization picture of particle production in ultra-relativistic heavy ion collisions. We describe the related physical reaction...
Hadron Resonances and Phase Threshold in Heavy Ion Collisions (2006)
Torrieri, Giorgio, Rafelski, Johann
We show that a measurement of the reaction energy dependence of relative hadron resonance yields in heavy ion collisions can be used to study the phase structure of the dense QCD matter created in...
Resonances and fluctuations of strange particle in 200 GeV Au-Au collisions (2006)
We perform an analysis of preliminary data on strange particles yields and fluctuations within the Statistical hadronization model. We begin by describing the theoretical disagreements between...
Fluctuations in jet momentum as an energy loss probe (2006)
Torrieri, Giorgio, Gale, Charles, Jeon, Sangyong, Pop, Vasile Topor
We investigate the measurement of the distribution of away-side jet $p_T$ as a way to probe the energy loss mechanism in heavy ion collisions, and constrain the properties of the medium created in...
Particle multiplicities and fluctuations in 200 GeV Au-Au collisions (2005)
Torrieri, Giorgio, Jeon, Sangyong, Rafelski, Johann
We use the statistical hadronization model (SHM) to describe hadron multiplicity yields and fluctuations. We consider 200 GeV Au-Au collisions, and show that both event averaged yields of stable...
Constraining freeze-out with yields and fluctuations (2005)
Torrieri, Giorgio, Jeon, Sangyong, Rafelski, Johann
We show that the simultaneous measurement of yields and fluctuations in heavy ion collisions is capable of falsifying and constraining the statistical hadronization model. We show how such a...
A statistical model analysis of yields and fluctuations in 200 GeV Au-Au collisions (2005)
Torrieri, Giorgio, Jeon, Sangyong, Rafelski, Johann
We show that the simultaneous measurement of yields and fluctuations is capable of falsifying and constraining the statistical hadronization model. We show how such a measurement can test for...
Particle yield fluctuations and chemical non-equilibrium at RHIC (2005)
Torrieri, Giorgio, Jeon, Sangyong, Rafelski, Johann
We study charge fluctuations within the statistical hadronization model. Considering both the particle yield ratios and the charge fluctuations we show that it is possible to differentiate between...
Centrality Dependence of Bulk Fireball Properties at RHIC (2005)
Rafelski, Johann, Letessier, Jean, Torrieri, Giorgio
We explore the centrality dependence of properties of the dense hadronic matter created in \sqrt{s_{NN}}=200 GeV Au--Au collisions at RHIC. Using the statistical hadronization model we fit particle...
SHARE: Statistical Hadronization with Resonances (2005)
Torrieri, Giorgio, Steinke, Steve, Broniowski, Wojciech, Florkowski, Wojciech, Letessier, Jean, Rafelski, Johann
SHARE is a collection of programs designed for the statistical analysis of particle production in relativistic heavy-ion collisions. With the physical input of intensive statistical parameters, it...
Centrality Dependence of Bulk Fireball Properties at RHIC (2005)
Rafelski, Johann, Letessier, Jean, Torrieri, Giorgio
We explore the centrality dependence of properties of the dense hadronic matter created in \sqrt{s_{NN}}=200 GeV Au--Au collisions at RHIC. Using the statistical hadronization model we fit particle...
SHARE: Statistical Hadronization with Resonances (2005)
Torrieri, Giorgio, Steinke, Steve, Broniowski, Wojciech, Florkowski, Wojciech, Letessier, Jean, Rafelski, Johann
SHARE is a collection of programs designed for the statistical analysis of particle production in relativistic heavy-ion collisions. With the physical input of intensive statistical parameters, it...
Centrality Dependence of Bulk Fireball Properties at RHIC (2004)
Rafelski, Johann, Letessier, Jean, Torrieri, Giorgio
We explore the centrality dependence of properties of the dense hadronic matter created in \sqrt{s_{NN}}=200 GeV Au--Au collisions at RHIC. Using the statistical hadronization model we fit particle...
Deconfinement energy threshold: analysis of hadron yields at 11.6 A GeV (2004)
Letessier, Jean, Rafelski, Johann, Torrieri, Giorgio
We analyze the hadron yields obtained at the AGS in the range 11--11.6 A GeV and discuss strategies to identify possible deconfinement at this energy scale. These include consideration of chemical...
Statistical hadronization with resonances (2004)
Torrieri, Giorgio, Letessier, Jean, Rafelski, Johann, Steinke, Steve
We introduce the equilibrium and non-equilibrium statistical hadronization picture of particle production in ultra-relativistic heavy ion collisions. We describe the related physical reaction...
Hadron resonance probes of QGP (2004)
Torrieri, Giorgio, Rafelski, Johann
We discuss the indirect and direct role of the short-lived resonances as probes of QGP freeze-out process. The indirect effect is the distortion of stable single particle yields and spectra by...
Torrieri, Giorgio, Rafelski, Johann
We introduce the Statistical Hadronization with Resonances (SHARE) suite of programs and perform a study of particle multiplicities as well as bulk thermodynamic quantities for the RHIC Au--Au...
Statistical hadronization phenomenology in heavy ion collisions at SPS and RHIC energies (2004)
This dissertation examines the phenomenology of statistical hadronization at ultrarelativistic energies. We start with an overview of current experimental and theoretical issues in Relativistic heavy...
SHARE: Statistical Hadronization with Resonances (2004)
Torrieri, Giorgio, Steinke, Steve, Broniowski, Wojciech, Florkowski, Wojciech, Letessier, Jean, Rafelski, Johann
SHARE is a collection of programs designed for the statistical analysis of particle production in relativistic heavy-ion collisions. With the physical input of intensive statistical parameters, it...
Statistical hadronization with resonances (2004)
Torrieri, Giorgio, Letessier, Jean, Rafelski, Johann, Steinke, Steve
We introduce the equilibrium and non-equilibrium statistical hadronization picture of particle production in ultra-relativistic heavy ion collisions. We describe the related physical reaction...
Statistical hadronization with resonances (2004)
Torrieri, Giorgio, Letessier, Jean, Rafelski, Johann, Steinke, Steve
We introduce the equilibrium and non-equilibrium statistical hadronization picture of particle production in ultra-relativistic heavy ion collisions. We describe the related physical reaction...
A comparison of statistical hadronization models (2003)
Torrieri, Giorgio, Rafelski, Johann
We investigate the sensitivity of fits of hadron spectra produced in heavy ion collisions to the choice of statistical hadronization model. We start by giving an overview of statistical model...
Statistical Hadronization probed by resonances (2002)
Torrieri, Giorgio, Rafelski, Johann
We study to what extent a measurement of the $m_\bot$ spectra for hadrons and their resonances can resolve ambiguities in statistical model description of particle production. We describe in...
Strangeness and QGP freeze-out dynamics (2001)
Rafelski, Johann, Torrieri, Giorgio, Letessier, Jean
We compare chemical and thermal analysis of the SPS Pb--Pb results at $158A$ GeV, and present a first chemical analysis of RHIC results. We show how a combined analysis of several strange hadron...
Strange hadrons and their resonances: a diagnostic tool of QGP freeze-out dynamics (2001)
Rafelski, Johann, Letessier, Jean, Torrieri, Giorgio
We update our chemical analysis of (strange) hadrons produced at the SPS in Pb--Pb collisions at 158A GeV and and present a first chemical analysis of RHIC results. We report that the shape of...
Strange hadron resonances as a signature of freeze-out dynamics (2001)
Torrieri, Giorgio, Rafelski, Johann
We study the production and the observability of Lambda*(1520), K*0(892), and Sigma*(1385), strange hadron resonances as function of the freeze-out conditions within the statistical model of hadron...
The Strange Quark-Gluon Plasma (2001)
Rafelski, Johann, Torrieri, Giorgio, Letessier, Jean
Strangeness flavor has turned out to be a very effective diagnostic tool of relativistic heavy ion physics. The absolute yield provides information about conditions arising in first instants of the...
Search for QGP and Thermal Freeze-out of Strange Hadrons (2000)
Torrieri, Giorgio, Rafelski, Johann
After reviewing the observables of QGP we perform an analysis of m_T spectra of strange hadrons measured as function of centrality in 156AGeV Pb--Pb interactions. We show that there is a good...