Search results for: Matthew Luzum

Items from 1 to 11 out of 11 results

article

Mixed Harmonic Correlations: Hydrodynamic Predictions at RHIC using Experimental Analysis Techniques

Fernando G. Gardim, Frederique Grassi, Matthew Luzum, Jacquelyn Noronha-Hostler

Nuclear Physics A > 2017 > 967 > C > 389-392

Correlations of different azimuthal flow harmonics v_n and symmetry planes Ψn can add constraints to theoretical models, and probe aspects of the system that are independent of the traditional single-harmonic measurements. Using NeXSPheRIO, a hydrodynamical model which has accurately reproduced a large set of single-harmonic correlations at RHIC, we make predictions of these new observables for 200...

article

Thermal and prompt photons at RHIC and the LHC

Jean-François Paquet, Chun Shen, Gabriel Denicol, Matthew Luzum, more

Nuclear Physics A > 2016 > 956 > C > 409-412

Thermal and prompt photon production in heavy ion collisions is evaluated and compared with measurements from both RHIC and the LHC. An event-by-event hydrodynamical model of heavy ion collisions that includes shear and bulk viscosities is used, along with up-to-date photon emission rates. Larger tension with measurements is observed at RHIC than at the LHC. The center-of-mass energy and centrality...

article

Energy versus centrality dependence of the jet quenching parameter $$\hat{q}$$ q ^ at RHIC and LHC: a new puzzle?

Carlota Andrés, Néstor Armesto, Matthew Luzum, Carlos A. Salgado, more

The European Physical Journal C > 2016 > 76 > 9 > 1-12

The central goal of jet quenching studies in high-energy nuclear collisions is the characterization of those QCD medium properties that are accessible by these probes. Most of the discussion in the last years has been focused on the determination of the jet quenching parameter, $$\hat{q}$$ q ^ . We present here an extraction of this parameter using data of inclusive particle suppression...

article

A Prospective Cohort Study of Medication Reconciliation Using Pharmacy Technicians in the Emergency Department to Reduce Medication Errors among Admitted Patients

Sarah Wallace Cater, Matthew Luzum, Allison E. Serra, Meredith H. Arasaratnam, more

Journal of Emergency Medicine > 2015 > 48 > 2 > 230-238

The collection of a complete, verified medication history is essential to patient safety. The involvement of clinical pharmacists has been shown to improve the completeness and accuracy of medication histories; however, to our knowledge, involvement of pharmacy technicians has not been studied.Our aim was to determine whether verification of medication histories by pharmacy technicians in the emergency...

article

Probing the early-time dynamics of relativistic heavy-ion collisions with electromagnetic radiation

Gojko Vujanovic, Jean-François Paquet, Gabriel S. Denicol, Matthew Luzum, more

Nuclear Physics A > 2014 > 932 > C > 230-234

Using 3 + 1D viscous relativistic fluid dynamics, we show that electromagnetic probes are sensitive to the initial conditions and to the out-of-equilibrium features of relativistic heavy-ion collisions. Within the same approach, we find that hadronic observables show a much lesser sensitivity to these aspects. We conclude that electromagnetic observables allow access to dynamical regions that are...

article

Extracting the bulk viscosity of the quark–gluon plasma

Jean-Bernard Rose, Jean-Francois Paquet, Gabriel S. Denicol, Matthew Luzum, more

Nuclear Physics A > 2014 > 931 > C > 926-930

We investigate the implications of a nonzero bulk viscosity coefficient on the azimuthal momentum anisotropy of ultracentral relativistic heavy ion collisions at the Large Hadron Collider. We find that, with IP-Glasma initial conditions, a finite bulk viscosity coefficient leads to a better description of the flow harmonics in ultracentral collisions. We then extract optimal values of bulk and shear...

article

Probing the non-equilibrium dynamics of hot and dense QCD with dileptons

Gojko Vujanovic, Jean-François Paquet, Gabriel S. Denicol, Matthew Luzum, more

Nuclear Physics A > 2014 > 931 > C > 701-705

It is argued that, in heavy ion collisions, thermal dileptons are good probes of the transport properties of the medium created in such events, and also of its early-time dynamics, usually inaccessible to hadronic observables. In this work we show that electromagnetic azimuthal momentum anisotropies do not only display a sensitivity to the shear relaxation time and to the initial shear-stress tensor...

article

Constraining models of initial state with v2 and v3 data from LHC and RHIC

Ekaterina Retinskaya, Matthew Luzum, Jean-Yves Ollitrault

Nuclear Physics, Section A > 2014 > 926 > Complete > 152-158

We present a combined analysis of elliptic and triangular flow data from LHC and RHIC using viscous relativistic hydrodynamics. Elliptic flow v2 in hydrodynamics is proportional to the participant eccentricity ε2 and triangular flow is proportional to the participant triangularity ε3, which means vn=κnεn, where κn is the linear response coefficient in harmonic n. Experimental data for v2 and v3 combined...

article

Characterizing the hydrodynamic response to the initial conditions

Fernando G. Gardim, Frédérique Grassi, Matthew Luzum, Jean-Yves Ollitrault

Nuclear Physics, Section A > 2013 > 904-905 > Complete > 503c-506c

In hydrodynamics, the momentum distribution of particles at the end of the evolution is completely determined by initial conditions. We study quantitatively to what extent anisotropic flow vn is determined by predictors such as the initial eccentricity εn in a set of realistic simulations, and we also show the importance of nonlinear terms in order to correctly predict v4. This knowledge will be important...

article

Extracting the shear viscosity of the quark-gluon plasma from flow in ultra-central heavy-ion collisions

Matthew Luzum, Jean-Yves Ollitrault

Nuclear Physics, Section A > 2013 > 904-905 > Complete > 377c-380c

We propose a method for extracting the shear viscosity over entropy density ratio (η/s) of the quark-gluon plasma from experimental data. We argue that uncertainty due to poor knowledge of the earliest stages of a heavy-ion collision is smallest for ultra-central events. The most precise value of η/s can thus be obtained from a global fit to pT-integrated Fourier harmonics of azimuthal correlations...

article

Collective flow and long-range correlations in relativistic heavy ion collisions

Matthew Luzum

Physics Letters B > 2011 > 696 > 5 > 499-504

Making use of recently released data on dihadron correlations by the STAR Collaboration, I analyze the long-range (“ridge-like”) part of these data and show that the dependence on both transverse momentum as well as orientation with respect to the event plane are consistent with correlations expected from only collective flow. In combination with previously analyzed centrality-dependent data, they...

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Keywords

HEAVY-ION COLLISIONS (2)
QUARK–GLUON PLASMA (2)
RELATIVISTIC VISCOUS HYDRODYNAMICS (2)
BULK VISCOSITY (1)
DIHADRON CORRELATIONS (1)
DILEPTON AZIMUTHAL MOMENTUM ANISOTROPY (1)
ELECTROMAGNETIC PROBES (1)
ELECTROMAGNETIC RADIATION (1)
FLOW (1)
FLUCTUATIONS (1)
INITIAL CONDITIONS OF RELATIVISTIC HEAVY-ION COLLISIONS (1)
MEDICAL ERRORS (1)
MEDICATION RECONCILIATION (1)
MIXED HARMONIC CORRELATIONS (1)
OUT-OF-EQUILIBRIUM INITIAL CONDITIONS (1)
PATIENT SAFETY (1)
PHARMACY TECHNICIAN (1)
QGP (1)
QUALITY IMPROVEMENT (1)
QUARK-GLUON PLASMA (1)
RELATIVISTIC HYDRODYNAMICS (1)
SHEAR RELAXATION TIME (1)
TEMPERATURE DEPENDENT SHEAR VISCOSITY (1)
TRANSPORT COEFFICIENTS OF STRONGLY INTERACTING MEDIA (1)
ULTRACENTRAL RELATIVISTIC HEAVY ION COLLISIONS (1)
ULTRARELATIVISTIC HEAVY ION COLLISONS (1)
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Elsevier (10)
Springer (1)

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Search results for: Matthew Luzum

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