Wenkai Fan
A5061494961- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nonlinear Dynamics and Pattern Formation
- Quantum chaos and dynamical systems
- Chaos control and synchronization
- Gamma-ray bursts and supernovae
- Experimental and Theoretical Physics Studies
- Mechanical and Optical Resonators
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Statistical Methods and Models
- Magnetic Field Sensors Techniques
- Black Holes and Theoretical Physics
- Fire dynamics and safety research
- Contact Mechanics and Variational Inequalities
- Simulation Techniques and Applications
- GNSS positioning and interference
- Physics of Superconductivity and Magnetism
- Computational Physics and Python Applications
- Pulsars and Gravitational Waves Research
- Plasma and Flow Control in Aerodynamics
- Atomic and Molecular Physics
- Geophysics and Gravity Measurements
- demographic modeling and climate adaptation
- Laser-Plasma Interactions and Diagnostics
Duke University
2020-2024
Fudan University
2024
Seascape Consultants (United Kingdom)
2022-2023
Wayne State University
2021
University of California, Berkeley
2021
Lawrence Berkeley National Laboratory
2021
Central China Normal University
2021
Nanjing University
2016-2020
Stony Brook University
2019
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 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...
Heavy-flavor hadrons produced in ultrarelativistic heavy-ion collisions are a sensitive probe for studying hadronization mechanisms of the quark-gluon-plasma. In this paper, we survey how different transport models simulation heavy-quark diffusion through quark-gluon plasma implement and affects final state observables. Utilizing same input charm-quark distribution all at transition, find that transverse-momentum dependence nuclear modification factor various charm hadron species has...
We study parton energy-momentum exchange with the quark gluon plasma (QGP) within a multistage approach composed of in-medium Dokshitzer-Gribov-Lipatov-Altarelli-Parisi evolution at high virtuality, and (linearized) Boltzmann transport formalism lower virtuality. This simulation is then calibrated in comparison high-<a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:msub><a:mi>p</a:mi><a:mi>T</a:mi></a:msub></a:math> charged hadrons, <b:math...
The JETSCAPE simulation framework is an overarching computational envelope for developing complete event generators heavy-ion collisions. It allows modular incorporation of a wide variety existing and future software that simulates different aspects collision. default package contains both the framework, entire set indigenous third party routines can be used to directly compare with experimental data. In this article, we outline algorithmic design define interfaces describe modules required...
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...
Understanding the modification of jets and high-$p_T$ probes in small systems requires integration soft hard physics. We present recent developments extending JETSCAPE framework to build an event generator, which includes correlations between partons, study jet observables systems. The multi-scale physics collision is separated into different stages. Hard scatterings are first sampled at binary positions provided by Glauber geometry. They then propagated backward space-time following...
We evaluate the second to fourth-order baryon, charge and strangeness susceptibilities near a chiral critical point using Nambu–Jona-Lasinio model under different temperatures baryon chemical potential. Baryon number are found be of greatest magnitude, offering strongest signal. Whereas have smallest divergence dominating area, owing large strange quark mass. also make an attempt compare our results with experiment data. The trend at high collision energy is consistent between theory...
For the first time, we investigate susceptibilities of dense quark matter up to $8$th order using an effective model. Generally higher will have more sign changes and larger magnitude, thus should give information about presence location conjectured QCD critical end point (CEP). Two cases are studied, one with CEP being crossover phase transition throughout diagram. It is found that a rapid can also similar pattern as case yield large signal. We propose several kinds ions for collision...
Parton energy-momentum exchange with the quark gluon plasma (QGP) is a multi-scale problem. In this work, we calculate interaction of charm quarks QGP within higher twist formalism at high virtuality and energy using MATTER model, while low portion treated via (linearized) Boltzmann Transport (LBT) formalism. Coherence effect that reduces medium-induced emission rate in model also taken into account. The interplay between these two formalisms studied detail used to produce good description...
We present measurements of azimuthal correlations charged hadron pairs in $\sqrt{{s}_{\mathit{NN}}}=200$ GeV $\mathrm{Au}+\mathrm{Au}$ collisions for the trigger and associated particle transverse-momentum ranges $1<{p}_{T}^{t}<10\phantom{\rule{4pt}{0ex}}\mathrm{GeV}/c$ $0.5<{p}_{T}^{a}<10\phantom{\rule{4pt}{0ex}}\mathrm{GeV}/c$. After subtraction an underlying event using a model that includes higher-order anisotropy ${v}_{2}, {v}_{3}$, ${v}_{4}$, away-side yield highest...
In this talk we review jet production in a large variety of collision systems using the JETSCAPE event generator and Hybrid Hadronization. Hadronization combines quark recombination, applicable when distances between partons phase space are small, string fragmentation appropriate for dilute parton systems. It can therefore smoothly describe transition from very like $e^++𝑒^−$ to full $𝐴 + 𝐴$ collisions. We test picture by generate jets various Comparison experimental data $𝑝 𝑝$ collisions...
We present predictions and postdictions for a wide variety of hard jet-substructure observables using multistage model within the framework. The details various parameter choices are described in []. A novel feature this is presence two stages jet modification: high-virtuality phase [modeled modular all twist transverse-scattering elastic-drag radiation ()], where modified coherence effects diminish medium-induced radiation, lower virtuality linear Boltzmann transport parton splits fully...
We study the subharmonic frequency response of a generalized driven oscillator excited by nonlinear periodic force. take magnetic pendulum called Doubochinski as an example. So-called “amplitude quantization,” i.e., existence multiple discrete solutions, is identified resonance in to feeding. The found be related symmetry driving force: Odd occurs under even symmetric force, and vice versa. obtain solutions investigate transition competition between multistable orbits via curves Poincaré...
We use a Bayesian-calibrated multistage viscous hydrodynamic model to explore deuteron yield, mean transverse momentum and flow observables in LHC Pb-Pb collisions. theoretical uncertainty the production of deuterons, including (i) contribution thermal (ii) models for subsequent formation deuterons (hadronic transport vs coalescence) (iii) overall sensitivity results -- particular bulk viscosity, which is often neglected studies production. Using physical parameters set by comparison only...
We study the nonlinear behaviors of mass-spring systems damped by dry friction using simulation a LC circuit anti-parallel diodes. show that differential equation for electric oscillator is equivalent to mechanical system when piecewise linear model used simplify diodes' I–V curve. derive series solutions under weak approximation which can describe resonant response as well amplitudes superharmonic components. The experimental results are consistent with solutions. also present phenomenon...
In this paper, the coupling strength G of Nambu–Jona-Lasinio (NJL) model is modified by incorporating quark’s feedback into gluon propagator. The two-flavor NJL with quark-dependent explored. quark condensate in framework has a conspicuous agreement lattice quantum chromodynamics (QCD) results at finite temperature. Then, it compared original both zero (chiral limit) and nonzero current mass. QCD phase diagram susceptibilities are investigated temperature–chemical potential [Formula: see...
Abstract We discuss the sign and energy dependence of second to tenth order susceptibilities baryon number, charge strangeness for analysis critical conditions in heavy ion collisions LHC RHIC by applying a modified Nambu-Jona-Lasinio model. This model is fitted quark condensate lattice QCD result at finite temperature zero chemical potential. The presence point made these deviate considerably from Hadron-Resonance-Gas that shows no criticality. sign, magnitude, higher fluctuations hint...
Heavy-flavor hadrons produced in ultra-relativistic heavy-ion collisions are a sensitive probe for studying hadronization mechanisms of the quark-gluon-plasma. In this work, we survey how different transport models simulation heavy-quark diffusion through quark-gluon plasma implement and affects final-state observables. Utilizing same input charm-quark distribution all at transition, find that transverse-momentum dependence nuclear modification factor various charm hadron species has...
The rotating saddle not only is an interesting system that able to trap a ball near its point, but can also intuitively illustrate the operating principles of quadrupole ion traps in modern physics. Unlike conventional models based on mass-point approximation, we study stability rotating-saddle using rigid-body dynamics. stabilization condition theoretically derived and subsequently verified by experiments. results are compared with previous model, giving large discrepancy as curvature...
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...