A5004585077- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Stochastic processes and statistical mechanics
- Magnetic properties of thin films
- ZnO doping and properties
- Nuclear physics research studies
- Transition Metal Oxide Nanomaterials
- Meteorological Phenomena and Simulations
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Physics of Superconductivity and Magnetism
- Advanced Memory and Neural Computing
Duke University
2016-2021
Fujian University of Technology
2021
Massachusetts Institute of Technology
2021
Lawrence Berkeley National Laboratory
2021
Durham Technical Community College
2019
Sichuan University
2017
Institute for Theoretical and Experimental Physics
2005
Sapienza University of Rome
2005
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...
Several transport models have been employed in recent years to analyze heavy-flavor meson spectra high-energy heavy-ion collisions. Heavy-quark coefficients extracted from these with their default parameters vary, however, by up a factor of 5 at high momenta. To investigate the origin this large theoretical uncertainty, systematic comparison heavy-quark is carried out between various models. Within common scheme devised for nuclear modification charm quarks brick medium quark-gluon plasma,...
By applying a Bayesian model-to-data analysis, we estimate the temperature and momentum dependence of heavy quark diffusion coefficient in an improved Langevin framework. The posterior range is obtained by performing Markov chain Monte Carlo random walk calibrating on experimental data $D$-meson $R_{\mathrm{AA}}$ $v_2$ three different collision systems at RHIC LHC: AuAu collisions 200 GeV, PbPb 2.76 5.02 TeV. spatial found to be consistent with lattice QCD calculations comparable other...
In relativistic heavy-ion collisions, the production of heavy quarks at large transverse momenta is strongly suppressed compared to proton-proton collisions. addition an unexpectedly azimuthal anisotropy was observed for emission charmed hadrons in non-central Both observations pose challenges theoretical understanding coupling between and quark-gluon plasma produced these Transport models evolution a QCD medium offer opportunity study effects - two most successful approaches are based on...
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 develop a framework of coupled transport equations for open heavy flavor and quarkonium states, in order to describe their inside the quark-gluon plasma. Our is capable studying simultaneously both hidden observables heavy-ion collision experiments can account both, uncorrelated correlated recombination. recombination implementation depends on real-time quark antiquark distributions. carry out consistency tests show how interplay among transport, dissociation drives system equilibrium....
Heavy flavor observables provide valuable information on the properties of hot and dense Quark-Gluon Plasma (QGP) created in ultra-relativistic nucleus-nucleus collisions. Various microscopic models have successfully described many associated with its formation. Their transport coefficients differ, however, due to different assumptions about underlying interaction heavy quarks plasma constituents, initial geometries formation times, hadronization processes a time evolution QGP. In this study...
Hard probes produced in perturbative processes are excellent for the study of hot and dense QCD matter created relativistic heavy-ion collisions. Transport theory, allowing coupling to an evolving medium with fluctuating initial conditions, has become a powerful tool this endeavor. However, implementation Landau-Pomeranchuk-Migdal (LPM) effect medium-induced parton bremsstrahlung pair production, poses challenge semi-classical transport models based on Boltzmann-type equations. In work, we...
The JETSCAPE framework is a modular and versatile Monte Carlo software package for the simulation of high energy nuclear collisions. In this work we present new tune JETSCAPE, called PP19, validate it by comparison to jet-based measurements in $p+p$ collisions, including inclusive single jet cross sections, shape observables, fragmentation functions, charged hadron dijet mass sections. These observables collisions provide baseline their counterparts Quantifying level agreement results with...
In this study, Ni/NiO binary nanoparticles are synthesized utilizing a reflux method combined with calcination process. The average size of the is 5-20 nm and Ni content 3.55%. Both microstructures interface states different phases have significant impacts on magnetic properties. By tuning temperature cooling field during loop measurement, change rule several critical parameters such as coercivity H C exchange bias E was complicated in nature. large (482 Oe) enhanced (1335 were observed at 5...
We develop a set of coupled Boltzmann equations to describe the dynamical evolution heavy quarks and quarkonia inside quark-gluon plasma. The quarkonium dissociation recombination terms are calculated from pNRQCD. Their interplay drives system detailed balance. quark energy loss term is necessary for reach kinematic thermalization. By coupling transport with initial particles' momenta generated by Pythia hydrodynamic medium evolutions, we can RAA ϒ family at both RHIC LHC energies....
The impact of nonequilibrium effects on the dynamics heavy-ion collisions is investigated by comparing a transport approach, Parton-Hadron-String-Dynamics (PHSD), to 2D+1 viscous hydrodynamical model, which based assumption local equilibrium and conservation laws. Starting model from same initial condition as in PHSD, using an equivalent lQCD equation state (EoS), coefficients, i.e., shear viscosity $\ensuremath{\eta}$ bulk $\ensuremath{\zeta}$ we compare time evolution system terms energy...
Abstract Beam optics design for a Super Tau-Charm Factory (STCF) that planning in China is presented this paper. This STCF an electron-positron circular collider characterized with high luminosity, wide energy ranges as well longitudinally polarized electron beam. In order to achieve the recently proposed collision scheme based on large Piwinski angle and crab waist sextupole will be adopted. paper, beam optical parameters their basis storage ring lattice are given. addition, preliminary...
We study how heavy quark dynamics is affected by the nature of bulk evolution QCD matter, initial condition system, and treatment elementary interactions between quarks surrounding medium. For same QGP expansion scenario we discuss consequences assumption a local equilibrium comparing for nuclear modification factor elliptic flows charm quarks. this purpose employ parton-hadron-string (PHSD), which an off-shell microscopic transport approach, as well linearized-Boltzmann (LB) scheme obtained...
Using a Bayesian model-to-data analysis, we estimate the temperature dependence of heavy quark diffusion coefficients by calibrating to experimental data $D$-meson $R_{\mathrm{AA}}$ and $v_2$ in AuAu collisions ($\sqrt{s_{NN}}=200$ GeV) PbPb ($\sqrt{s_{NN}}=2.76$ TeV)~\cite{Xie:2016iwq}. The spatial coefficient $D_s2\pi T$ is found be mostly constraint around $(1.3-1.5) T_c$ compatible with lattice QCD calculations. We demonstrate capability our improved Langevin model simultaneously...
We investigate the heavy flavor dynamics in quark-gluon plasma (QGP) medium created p-Pb collisions at CERN Large Hadron Collider (LHC). In (3+1)-dimensional viscous hydrodynamics model describing QGP medium, of quarks are studied an improved Langevin framework incorporating both collisional and radiative energy loss. The hadronization is given by a hybrid fragmentation recombination. find that in-medium evolution charm raises D-meson $R_{pPb}$ low transverse momenta while it suppresses...
The modification of jet substructure in relativistic heavy-ion collisions is studied using JETSCAPE, a publicly available software package containing framework for Monte Carlo event generators. Multi-stage evolution JETSCAPE provides an integrated description quenching by combining multiple models, with each becoming active at different stage the parton shower evolution. Jet due to aspects shape and fragmentation observables. Various combinations energy loss models are exploed, medium...
Transport equations have been applied successfully to describe the quarkonium evolution inside quark-gluon plasma, which include both plasma screening effects and recombination. We demonstrate how transport equation is derived from QCD by using open quantum system framework effective field theory. Weak coupling Markovian approximations used in derivation are justified a separation of scales. By solving numerically, we study Upsilon production heavy ion collisions.