C. Loizides
A5087302152- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Advanced Data Storage Technologies
- Stochastic processes and statistical mechanics
- Algorithms and Data Compression
- Radiation Detection and Scintillator Technologies
- Statistical Methods and Bayesian Inference
- Nuclear physics research studies
- Fluid Dynamics and Turbulent Flows
- Distributed and Parallel Computing Systems
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Advanced Mathematical Modeling in Engineering
- Geometric Analysis and Curvature Flows
- Cosmology and Gravitation Theories
- Theoretical and Computational Physics
- Parallel Computing and Optimization Techniques
- Radiation Effects in Electronics
- Statistical Methods and Inference
- Markov Chains and Monte Carlo Methods
- Advanced Data Compression Techniques
Oak Ridge National Laboratory
2017-2025
A. Alikhanyan National Laboratory
2015-2024
University of Houston
2023-2024
Rice University
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2012-2023
Homi Bhabha National Institute
2020-2023
Variable Energy Cyclotron Centre
2018-2023
University of Bergen
2004-2023
European Organization for Nuclear Research
2012-2023
University of Koblenz and Landau
2023
This Letter presents measurements of the elliptic flow charged particles as a function pseudorapidity and centrality from Cu-Cu collisions at 62.4 200 GeV using PHOBOS detector Relativistic Heavy Ion Collider. The in is found to be significant even for most central events. For comparison with Au-Au results, it that detailed way which collision geometry (eccentricity) estimated critical importance when scaling out system-size effects. A new form eccentricity, called participant introduced...
This writeup is a compilation of the predictions for forthcoming Heavy Ion Program at Large Hadron Collider, as presented CERN Theory Institute 'Heavy Collisions LHC - Last Call Predictions', held from May 14th to June 10th 2007.
This report presents the capabilities of CMS experiment to explore rich heavy-ion physics programme offered by CERN Large Hadron Collider (LHC). The collisions lead nuclei at energies , will probe quark and gluon matter unprecedented values energy density. prime goal this research is study fundamental theory strong interaction — Quantum Chromodynamics (QCD) in extreme conditions temperature, density parton momentum fraction (low-x).
Pseudorapidity distributions of charged particles emitted in $Au+Au$, $Cu+Cu$, $d+Au$, and $p+p$ collisions over a wide energy range have been measured using the PHOBOS detector at RHIC. The centrality dependence both particle multiplicity midrapidity were measured. with $|\eta|<5.4$, which account for between 95% 99% total charged-particle emission associated collision participants, are presented different centralities. Both density, $dN_{ch}/d\eta$, multiplicity, $N_{ch}$, found to...
We present the results of an improved Monte Carlo Glauber (MCG) model relevance for collisions involving nuclei at center-of-mass energies BNL Relativistic Heavy Ion Collider ($\sqrt{{s}_{\mathit{NN}}}=0.2$ TeV), CERN Large Hadron (LHC) ($\sqrt{{s}_{\mathit{NN}}}=2.76--8.8\phantom{\rule{0.16em}{0ex}}\mathrm{TeV}$), and proposed future hadron colliders ($\sqrt{{s}_{\mathit{NN}}}\ensuremath{\approx}10--63$ TeV). The inelastic $pp$ cross sections as a function $\sqrt{{s}_{\mathit{NN}}}$ are...
In this paper, we investigate various ways of defining the initial source eccentricity using Monte Carlo Glauber (MCG) approach. particular, examine participant eccentricity, which quantifies shape by major axes ellipse formed interaction points participating nucleons. We show that reasonable variation density parameters in calculation, as well variations how matter production is modeled, do not significantly modify already established behavior a function collision centrality. Focusing on...
A measurement of two-particle correlations with a high transverse momentum trigger particle (p_T^{trig} > 2.5 GeV/c) is presented for Au+Au collisions at sqrt(s_NN) = 200 GeV over the uniquely broad longitudinal acceptance PHOBOS detector (-4 < \Delta\eta 2). broadening away-side azimuthal correlation compared to elementary observed all \Delta\eta. As in p+p collisions, near-side characterized by peak correlated partners small angle relative particle. However, central an additional extended...
``Glauber'' models are used to calculate geometric quantities in the initial state of heavy ion collisions, such as impact parameter, number participating nucleons and eccentricity. The four RHIC experiments have different methods for Glauber Model calculations, leading similar results various observables. In this document, we describe an implementation Monte Carlo based calculation by PHOBOS experiment. assumptions that go described. A user's guide is provided running calculations.
Medium effects on the production of high-$p_{\rm T}$ particles in nucleus-nucleus (AA) collisions are generally quantified by nuclear modification factor ($R_{\rm AA}$), defined to be unity absence effects. Modeling particle including a nucleon-nucleon impact parameter dependence, we demonstrate that $R_{\rm AA}$ at midrapidity peripheral AA can significantly affected event selection and geometry biases. Even without jet quenching shadowing, these biases cause an apparent suppression for...
Abstract High-energy nuclear collisions encompass three key stages: the structure of colliding nuclei, informed by low-energy physics, initial condition , leading to formation quark–gluon plasma (QGP), and hydrodynamic expansion hadronization QGP, final-state hadron distributions that are observed experimentally. Recent advances in both experimental theoretical methods have ushered a precision era heavy-ion collisions, enabling an increasingly accurate understanding these stages. However,...
This article presents results on event-by-event elliptic flow fluctuations in $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{\mathit{NN}}}=$ 200 GeV, where the contribution from non-flow correlations has been subtracted. An analysis method is introduced to measure correlations, relying assumption that are most prominent short ranges ($|\ensuremath{\Delta}\ensuremath{\eta}|<2$). Assuming of order observed $p+p$ for long-range ($|\ensuremath{\Delta}\ensuremath{\eta}|>2$), relative...
This Letter presents the first measurement of event-by-event fluctuations elliptic flow parameter v(2) in Au+Au collisions at square root(s(NN))=200 GeV as a function collision centrality. The relative nonstatistical are found to be approximately 40%. results, including contributions from and azimuthal correlations that unrelated reaction plane (nonflow correlations), establish an upper limit on magnitude underlying fluctuations. is consistent with predictions based spatial participating...
Relativistic heavy ion collisions produce nuclei-sized droplets of quark-gluon plasma whose expansion is well described by viscous hydrodynamic calculations. Over the past half decade, this formalism was also found to apply smaller closer size individual nucleons, as produced in $p+p$ and $p+A$ collisions. The paradigm further tested with a variety collision species, including $p+\mathrm{Au},d+\mathrm{Au}$, $^{3}\mathrm{He}+\mathrm{Au}$ producing different geometries. Nevertheless, questions...
We present the first measurements of pseudorapidity distribution primary charged particles in Cu+Cu collisions as a function collision centrality and energy, √sNN=22.4, 62.4, 200 GeV, over wide range pseudorapidity, using PHOBOS detector. A comparison Au+Au results shows that total number produced rough shape (height width) distributions are determined by nucleon participants. More detailed studies reveal more precise matching full occurs for same Npart/2A rather than Npart. In other words,...
We present transverse momentum distributions of charged hadrons produced in Cu+Cu collisions at sqrt(s) = 62.4 and 200 GeV. The spectra are measured for momenta 0.25 < p_T 5.0 GeV/c GeV 7.0 GeV, a pseudo-rapidity range 0.2 eta 1.4. nuclear modification factor R_AA is calculated relative to p+p data both collision energies as function centrality. At given energy fractional cross-section, observed be systematically larger compared Au+Au. However, the same number participating nucleons,...
The precise reconstruction of jet transverse momenta in heavy-ion collisions is a challenging task. A major obstacle the large number (mainly) low-${p}_{\mathrm{T}}$ particles overlaying jets. Strong region-to-region fluctuations this background complicate measurement and lead to significant uncertainties. In paper, novel approach correct (or energies) for underlying introduced. proposed method makes use common machine learning techniques estimate momentum based on several parameters,...
We review the theoretical and experimental progress in Glauber model of multiple nucleon and/or parton scatterings, after last 10--15 years operation with proton nuclear beams at CERN Large Hadron Collider (LHC) various light heavy colliding ions BNL Relativistic Heavy Ion (RHIC). The main developments state-of-the-art field are summarized. These encompass measurements inclusive inelastic cross sections, advances description density profiles their fluctuations, inclusion subnucleonic degrees...
We present a study on the applicability of transverse mass scaling for identified particle spectra in proton-proton collisions at $\sqrt{s}=7$ TeV based data taken by ALICE experiment LHC. The measured yields are parametrized and compared to estimates obtained from generalized approach applied different reference spectra. It is found that not able describe over full range momentum. At low $p_{\rm T}$, deviations $20$% or more obtained, particular if pions used as particles. A better...