A5011146579- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Gas Dynamics and Kinetic Theory
- Pulsars and Gravitational Waves Research
- Quantum, superfluid, helium dynamics
- Cold Atom Physics and Bose-Einstein Condensates
- Neural Networks and Applications
- Physics of Superconductivity and Magnetism
- Fluid Dynamics and Turbulent Flows
- Advanced Thermodynamics and Statistical Mechanics
- Theoretical and Computational Physics
- Computational Fluid Dynamics and Aerodynamics
- Magnetic confinement fusion research
- High-pressure geophysics and materials
- Ionosphere and magnetosphere dynamics
- Quantum Mechanics and Applications
- Statistical Mechanics and Entropy
- Solar and Space Plasma Dynamics
- Computational Physics and Python Applications
- Lattice Boltzmann Simulation Studies
- Nuclear reactor physics and engineering
- Relativity and Gravitational Theory
Kent State University
2016-2025
Georgia Southern University
2024
Guangxi Normal University
2023-2024
Thomas Jefferson National Accelerator Facility
2024
University of California, Riverside
2024
Imam Abdulrahman Bin Faisal University
2018-2023
Campbell Collaboration
2023
University of Houston
2023
Atlantic General Hospital
2022
TU Wien
2003-2021
We analyze the collective modes of high-temperature QCD in case when there is an anisotropy momentum-space distribution function for gluons. perform a tensor decomposition gluon self-energy and solve dispersion relations both stable unstable modes. Results are presented class anisotropic functions which can be obtained by stretching or squeezing isotropic along one direction momentum space. find that three either two modes, depending on whether stretched squeezed. The presence have...
We calculate the three-loop thermodynamic potential of QCD at finite temperature and chemical potential(s) using hard-thermal-loop perturbation theory (HTLpt) reorganization density QCD. The resulting analytic allows us to compute pressure, energy density, entropy quark-gluon plasma. Using these we trace anomaly, speed sound, second-, fourth-, sixth-order quark number susceptibilities. For all observables considered find good agreement between our HTLpt calculations available lattice data...
This paper presents a comprehensive review of both the theory and experimental successes Quantum Chromodynamics, starting with its emergence as well defined in 1972-73 following developments results up to present day. Topics include earliest theoretical foundations; fundamental constants QCD; an introductory discussion lattice QCD, only known method for obtaining exact predictions from methods approximating special focus on effective field theories; QCD under extreme conditions; measurements...
Abstract This review aims at providing an extensive discussion of modern constraints relevant for dense and hot strongly interacting matter. It includes theoretical first-principle results from lattice perturbative QCD, as well chiral effective field theory results. From the experimental side, it heavy-ion collision low-energy nuclear physics results, observations neutron stars their mergers. The validity different constraints, concerning specific conditions ranges applicability, is also provided.
We continue our exploration of the collective modes an anisotropic quark-gluon plasma by extending previous analysis to arbitrary Riemann sheets. demonstrate that in presence momentum-space anisotropies parton distribution functions there are new relevant singularities on neighboring unphysical then show for sufficiently strong these move into region spacelike momentum and their effect can extend down physical sheet. In order this explicitly we consider polarization tensor gluons propagating...
Non-Abelian plasma instabilities may be responsible for the fast apparent quark-gluon thermalization in relativistic heavy-ion collisions if their exponential growth is not hindered by nonlinearities. We study real-time evolution of an anisotropic non-Abelian with SU(2) gauge group hard-loop approximation. find both linear and strongly nonlinear regime, only a brief phase subexponential behavior between.
We calculate the free energy of a hot gluon plasma to leading order in hard-thermal-loop perturbation theory. Effects associated with screening, quasiparticles, and Landau damping are resummed all orders. The ultraviolet divergences generated by propagator corrections can be canceled counterterm which depends on thermal mass. deviation from lattice QCD results for $T>{2T}_{c}$ has correct sign roughly magnitude accounted next-to-leading corrections.
We exactly solve the one-dimensional boost-invariant Boltzmann equation in relaxation time approximation for arbitrary shear viscosity. The results are compared with predictions of viscous and anisotropic hydrodynamics. Studying different nonequilibrium cases comparing exact kinetic-theory to second-order hydrodynamics we find that recent formulations agree better solution than standard Israel-Stewart approach. Additionally, that, given appropriate connection between kinetic times, provides...
We present results of the application anisotropic hydrodynamics (aHydro) framework to (2+1)-dimensional boost invariant systems. The necessary aHydro dynamical equations are derived by taking moments Boltzmann equation using a momentum-space one-particle distribution function. derivation and then proceed numerical solutions resulting partial differential both realistic smooth Glauber initial conditions fluctuating Monte-Carlo conditions. For this purpose we have developed two...
Anisotropic hydrodynamics is a non-perturbative reorganization of relativistic that takes into account the large momentum-space anisotropies generated in ultrarelativistic heavy-ion collisions. As result, it allows one to extend regime applicability hydrodynamic treatments situations can be quite far from isotropic thermal equilibrium. In this paper, I review material presented series three introductory lectures. derivation ideal and second-order viscous kinetic theory. then show how methods...
Non-Abelian plasma instabilities play a crucial role in the nonequilibrium dynamics of weakly coupled quark-gluon plasma, and they importantly modify standard perturbative bottom-up thermalization scenario heavy-ion collisions. Using auxiliary-field formulation hard-loop effective theory, we study numerically real-time evolution an anisotropic collisionless Yang-Mills undergoing longitudinal free-streaming expansion. In this first lattice simulation consider most unstable modes,...
We present a complete formulation of second-order $(2+1)$-dimensional anisotropic hydrodynamics. The resulting framework generalizes leading-order hydrodynamics by allowing for deviations the one-particle distribution function from spheroidal form assumed at leading order. derive equations motion additional terms in macroscopic currents generated these their kinetic definition using Grad-Israel-Stewart 14-moment ansatz. result is set coupled partial differential momentum-space anisotropy...
We determine the dynamical attractors associated with anisotropic hydrodynamics (aHydro) and DNMR equations for a $0+1\mathrm{d}$ conformal system using kinetic theory in relaxation time approximation. compare our results to nonequilibrium attractor obtained from exact solution of Boltzmann equation, Navier-Stokes theory, second-order Mueller-Israel-Stewart theory. demonstrate that aHydro equation resums an infinite number terms inverse Reynolds number. The resulting resummed possesses...
In this paper we review recent progress towards understanding the nature of quarkonia in quark-gluon plasma. We theory necessary to understand melting bound states due color-screening, including lattice results for heavy quark potential, on correlation functions related relevant spectral functions, and emergence a complex-valued potential high-temperature quantum chromodynamics. close with brief survey phenomenological models quarkonium suppression relativistic ion collisions.
We present an exact solution of the relativistic Boltzmann equation for a system undergoing boost-invariant longitudinal and azimuthally symmetric transverse flow ("Gubser flow"). The resulting nonequilibrium dynamics is compared to first second order hydrodynamic approximations various shear viscosity entropy density ratios. This novel can be used test validity accuracy different in conditions similar those generated heavy-ion collisions.
We calculate the number density, energy transverse pressure, longitudinal and magnetization of an ensemble spin one-half particles in presence a homogenous background magnetic field. The field direction breaks spherical symmetry causing pressure to be different than parallel it. present explicit formulae appropriate at zero finite temperature for both charged uncharged including effect anomalous moment. demonstrate that resulting expressions satisfy canonical relations, Omega = - P_parallel...
I compute the thermal suppression of $\ensuremath{\Upsilon}(1s)$ and ${\ensuremath{\chi}}_{b1}$ states in $\sqrt{{s}_{NN}}=2.76\text{ }\text{ }\mathrm{TeV}$ Pb-Pb collisions. Using each these estimate total ${R}_{AA}$ for state as a function centrality, rapidity, transverse momentum. find less than would be traditionally assumed; however, my final results are good agreement with recent preliminary CMS data.
We derive the form of viscous corrections to phase-space distribution function due bulk pressure and shear stress tensor using iterative Chapman-Enskog method. then calculate transport coefficients necessary for second-order hydrodynamic evolution tensor. demonstrate that obtained method are different than those previously 14-moment approximation a finite particle mass. Specializing case boost-invariant transversally homogeneous longitudinal expansion, we show result in better agreement with...
Bjorken hydrodynamics applies to the boost invariant regime of heavy ion collisions; Gubser generalized this nuclei finite radius. Assuming Gubser's symmetry, authors solve Boltzmann equation numerically, and show that is applicable in a much larger than one might naively expect, even when ratio shear viscosity entropy density relatively large.