A5100666978- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Nuclear reactor physics and engineering
- Medical Imaging Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Stochastic processes and statistical mechanics
- Plant Virus Research Studies
- Distributed and Parallel Computing Systems
- Statistical Methods and Bayesian Inference
- Atomic and Subatomic Physics Research
- Gamma-ray bursts and supernovae
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Fluid Dynamics and Turbulent Flows
- Particle Accelerators and Free-Electron Lasers
- Radiation Therapy and Dosimetry
- Markov Chains and Monte Carlo Methods
- Optical properties and cooling technologies in crystalline materials
Massachusetts Institute of Technology
2016-2025
Moscow Institute of Thermal Technology
2015-2024
University of Antwerp
2024
Institute of High Energy Physics
2019-2024
A. Alikhanyan National Laboratory
2022-2024
Scuola Normale Superiore
2023-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2023-2024
William & Mary
2024
Williams (United States)
2024
Seascape Consultants (United Kingdom)
2023
We introduce the concepts of participant triangularity and triangular flow in heavy-ion collisions, analogous to definitions eccentricity elliptic flow. The characterizes anisotropy initial nuclear overlap geometry arises from event-by-event fluctuations participant-nucleon collision points. In studies using a multiphase transport model (AMPT), signal is observed that proportional corresponds large third Fourier coefficient two-particle azimuthal correlation functions. Using correlations at...
Results on charged pion and kaon production in central Pb+Pb collisions at 20A 30A GeV are presented compared to data lower higher energies. A rapid change of the energy dependence is observed around for yields pions kaons as well shape transverse mass spectra. The compatible with prediction that threshold a state deconfined matter early stage located low SPS
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 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 study the properties of strongly-coupled quark-gluon plasma with a multistage model heavy ion collisions that combines T$_\mathrm{R}$ENTo initial condition ansatz, free-streaming, viscous relativistic hydrodynamics, and hadronic transport. A model-to-data comparison Bayesian inference is performed, revisiting assumptions made in previous studies. The role parameter priors studied light their importance towards interpretation results. emphasize use closure tests to perform extensive...
Using combined data from the Relativistic Heavy Ion and Large Hadron Colliders, we constrain shear bulk viscosities of quark-gluon plasma (QGP) at temperatures ∼150–350 MeV. We use Bayesian inference to translate experimental theoretical uncertainties into probabilistic constraints for viscosities. With model averaging propagate an estimate uncertainty generated by transition hydrodynamics hadron transport in plasma's final evolution stage, providing most reliable phenomenological date on...
We present measurements of the pseudorapidity distribution primary charged particles produced in $\mathrm{A}\mathrm{u}+\mathrm{A}\mathrm{u}$ collisions at three energies, $\sqrt{{s}_{NN}}=19.6$, 130, and 200 GeV, for a range collision centralities. The narrows more central excess are high peripheral collisions. For given centrality, however, distributions found to scale with energy according ``limiting fragmentation'' hypothesis. universal fragmentation region described by this scaling grows...
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...
We present the first measurement of pseudorapidity densities primary charged particles near midrapidity in Au+Au collisions at sqrt[s(NN)] = 56 and 130 GeV. For most central collisions, we find charged-particle density to be dN/deta|(|eta|<1) 408+/-12(stat)+/-30(syst) GeV 555+/-12(stat)+/-35(syst) GeV, values that are higher than any previously observed nuclear collisions. Compared proton-antiproton our data show an increase per participant by more 40% energy.
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...
We have measured transverse momentum distributions of charged hadrons produced in d+Au collisions at sqrt[s(NN)]=200 GeV. The spectra were obtained for momenta 0.25<p(T)<6.0 GeV/c, a pseudorapidity range 0.2<eta<1.4 the deuteron direction. evolution with collision centrality is presented comparison to p+pmacr; same energy. With increasing centrality, yield high increases more rapidly than overall particle density, leading strong modification spectral shape. This change shape qualitatively...
This Rapid Communication describes the measurement of elliptic flow for charged particles in Au+Au collisions at $\sqrt{{s}_{\mathit{NN}}}=200$ GeV using PHOBOS detector Relativistic Heavy Ion Collider. The measured azimuthal anisotropy is presented over a wide range pseudorapidity three broad collision centrality classes first time this energy. Two distinct methods extracting signal were used to reduce systematic uncertainties. falls sharply with increasing $|\ensuremath{\eta}|$ 200 all...
We report a new determination of $\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{q}$, the jet transport coefficient quark-gluon plasma. use JETSCAPE framework, which incorporates novel multistage theoretical approach to in-medium evolution and Bayesian inference for parameter extraction. The calculations, based on Matter Lbt quenching models, are compared experimental measurements inclusive hadron suppression in $\mathrm{Au}+\mathrm{Au}$ collisions at BNL Relativistic Heavy Ion Collider (RHIC)...
We present a new study of jet interactions in the quark-gluon plasma created high-energy heavy-ion collisions, using multistage event generator within jetscape framework. focus on medium-induced modifications rate inclusive jets and high transverse momentum (high-${p}_{\mathrm{T}}$) hadrons. Scattering-induced energy loss is calculated two stages: virtuality stage based matter model, which scattering highly virtual partons modifies vacuum radiation pattern, second at lower lbt leading gain...
The charged-particle pseudorapidity density dNch/dη has been measured for Au+Au collisions at √sNN=130GeV RHIC, using the PHOBOS apparatus. total number of charged particles produced 3% most-central |η|≤5.4 is found to be 4200±470. evolution with centrality discussed, and compared model calculations data from proton-induced collisions. show an enhancement in production midrapidity, while fragmentation regions, results are consistent expectations pp pA scattering.Received 6 June...
The PHOBOS experiment has measured the charged particle multiplicity at mid-rapidity in Au+Au collisions sqrt(s_NN) = 200 GeV as a function of collision centrality. Results on dN/deta(eta<1) divided by number participating nucleon pairs, , are presented . As was found from similar data 130 GeV, can be equally well described parton saturation models and two-component fits which include contributions that scale Npart binary collisions, Ncoll. We compare two energies means ratio R(200/130)...
We present transverse momentum distributions of charged hadrons produced in Au+Au collisions at sqrt(s_NN) = 200 GeV. The spectra were measured for momenta p_T from 0.25 to 4.5 GeV/c a rapidity range 0.2 < y_pi 1.4. evolution the is studied as function collision centrality, 65 344 participating nucleons. results are compared data proton-antiproton and lower RHIC energies. find significant change spectral shape between peripheral collisions. Comparing central collisions, we that yields...
This Letter describes the measurement of energy dependence elliptic flow for charged particles in $\mathrm{Au}+\mathrm{Au}$ collisions using PHOBOS detector at Relativistic Heavy Ion Collider. Data taken collision energies $\sqrt{{s}_{NN}}=19.6$, 62.4, 130, and 200 GeV are shown over a wide range pseudorapidity. These results, when plotted as function ${\ensuremath{\eta}}^{\ensuremath{'}}=|\ensuremath{\eta}|\ensuremath{-}{y}_{\mathrm{beam}}$, scale with approximate linearity throughout...
The past decade has seen huge advances in experimental measurements made heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) and more recently Large Hadron (LHC). These new data, combination with theoretical from calculations a variety of frameworks, have led to broad deep knowledge properties thermal QCD matter. Increasingly quantitative descriptions quark-gluon plasma (QGP) created these established that QGP is strongly coupled liquid lowest value specific viscosity ever...
The modification of hard jets in an extended static medium held at a fixed temperature is studied using three different Monte Carlo event generators: linear Boltzmann transport (LBT), modular all twist transverse-scattering elastic-drag and radiation (MATTER), algorithm for relativistic treatment heavy-ion interactions (MARTINI). Each generator contains set assumptions regarding the energy virtuality partons within jet versus scale and, hence, applies to epoch space-time history evolution....
This paper describes the measurement of collective flow for charged particles in Au+Au collisions at sqrt[s(NN)]=130 GeV using PHOBOS detector Relativistic Heavy Ion Collider (RHIC). The measured azimuthal hit anisotropy is presented over a wide range pseudorapidity (-5.0<eta<5.3) first time this energy. result, averaged momenta and particle species, observed to reach 7% peripheral midrapidity, falling off with centrality increasing |eta|. These results call into question common assumption...
We present the first measurement of pseudorapidity density primary charged particles in Au+Au collisions at root square[s(NN)] = 200 GeV. For 6% most central collisions, we obtain dN(ch)/d(eta)/(/eta/<1) 650+/-35(syst). Compared to 130 GeV, highest energy studied previously, an increase by a factor 1.14+/-0.05 90% confidence level, is found. The dependence discussed comparison with data from proton-induced and theoretical predictions.