A5102813393- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- COVID-19 epidemiological studies
- Mathematical and Theoretical Epidemiology and Ecology Models
- Evolution and Genetic Dynamics
- Pulsars and Gravitational Waves Research
- SARS-CoV-2 and COVID-19 Research
- Superconducting Materials and Applications
- Nuclear reactor physics and engineering
- Statistical Mechanics and Entropy
- Fractional Differential Equations Solutions
- Laser-Plasma Interactions and Diagnostics
- Gas Dynamics and Kinetic Theory
- COVID-19 Pandemic Impacts
- Astro and Planetary Science
- Solar and Space Plasma Dynamics
- Fluid Dynamics and Turbulent Flows
- Computational Fluid Dynamics and Aerodynamics
- Differential Equations and Numerical Methods
- Particle Dynamics in Fluid Flows
- Combustion and flame dynamics
- Ionosphere and magnetosphere dynamics
- Cold Atom Physics and Bose-Einstein Condensates
- Markov Chains and Monte Carlo Methods
Lovely Professional University
2022-2025
University of Notre Dame
2025
Wayne State University
2015-2024
McGill University
1999-2024
Humboldt-Universität zu Berlin
2024
Jadavpur University
2020-2023
SRM Institute of Science and Technology
2023
Seascape Consultants (United Kingdom)
2023
Nagoya University
2019
Michigan State University
2019
Within five different approaches to parton propagation and energy loss in dense matter, a phenomenological study of experimental data on suppression large-${p}_{T}$ single inclusive hadrons heavy-ion collisions at both the BNL Relativistic Heavy Ion Collider (RHIC) CERN Large Hadron (LHC) was carried out. The evolution bulk medium used for given by 2 + 1 dimensional or 3 hydrodynamic models which are also constrained hadron spectra. Values jet transport parameter $\stackrel{\ifmmode...
We study the properties of strongly-coupled quark-gluon plasma with a multistage model heavy ion collisions that combines T$_\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 perform a systematic comparison of three different jet energy-loss approaches. These include the Armesto-Salgado-Wiedemann scheme based on approach Baier-Dokshitzer-Mueller-Peigne-Schiff and Zakharov (BDMPS-Z/ASW), higher twist (HT) Arnold-Moore-Yaffe (AMY) approach. In this comparison, an identical medium evolution will be utilized for all approaches: entails not only use same realistic three-dimensional relativistic fluid dynamics (RFD) simulation, but also initial parton-distribution...
We review the currently available formalisms for radiative energy loss of a high-momentum parton in dense strongly interacting medium. The underlying theoretical framework four commonly used is discussed and differences commonalities between are highlighted. A quantitative comparison single gluon emission spectra as well distributions given model system consisting uniform medium with fixed length L=2 fm L=5 (the `Brick'). Sizable found. largest can be attributed to specific approximations...
The energy loss of hard jets produced in the deep-inelastic scattering off a large nucleus is considered collinear limit. In particular, single gluon emission cross section due to multiple medium calculated. Calculations are carried out higher-twist scheme, which extended include contributions from transverse scatterings on both quark and radiated gluon. leading length-enhanced parts these power suppressed resummed. Various interferences between such diagrams lead Landau-Pomeranchuk-Migdal...
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...
We derive an expression relating the transport parameter $\stackrel{^}{q}$ and shear viscosity $\ensuremath{\eta}$ of a weakly coupled quark-gluon plasma. A deviation from this relation can be regarded as quantitative measure ``strong coupling'' medium. The ratio ${T}^{3}/\stackrel{^}{q}$, where $T$ is temperature, more broadly valid coupling strength medium than $\ensuremath{\eta}/s$, $s$ denotes entropy density. Different estimates derived existing Relativistic Heavy Ion Collider data are...
An extension to the soft collinear effective theory description of hard jets is motivated include leading contributions between propagating partons within jet with radiated from a dense extended medium. The resulting Lagrangian, containing both and power suppressed (in scale ${Q}^{2}$) contribution, arises primarily interactions modes in Glauber In this first attempt, partonic have been ignored, an effort focus solely on modes. While effect such vacuum cross sections are by powers compared...
We outline a novel approach to develop an in-medium shower Monte-Carlo event generator based on the higher-twist formalism of jet modification. By undoing one light-cone integrals which sets corresponding momentum be equal in amplitude and complex conjugate, we introduce uncertainty smaller component. This allows for generalization standard analytic Wigner transform like formalism, where non-conjugate large position are retained each parton. Jets generated event-by-event by simulating this...
Finite temperature lattice simulations of quantum chromodynamics (QCD) are sensitive to the hadronic mass spectrum for temperatures below "critical" T(c) ≈ 160 MeV. We show that a recent precision determination QCD trace anomaly shows evidence existence large number hadron states beyond those known from experiment. The results well represented by an exponentially growing up T=155 Using simple parametrizations we how one may estimate total spectral weight in these yet undermined states.
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....
The nearside distribution of particles at intermediate transverse momentum, associated with a high momentum trigger hadron produced in energy heavy-ion collision, is broadened rapidity compared the jet cone. This thought to contain lost by progenitor parton hadron. We show that broadening can be explained as final-state deflection gluons radiated from hard inside medium soft, transversely oriented, turbulent color fields arise presence plasma instabilities. magnitude effect found grow size...
We present a parameter-free postdiction of the high-${p}_{T}$ charged-hadron nuclear modification factor (${R}_{AA}$) in two centralities, measured by CMS Collaboration Pb-Pb collisions at LHC. The evolution bulk medium is modeled using viscous fluid dynamics, with parameters adjusted to describe soft hadron yields and elliptic flow. Assuming dominance radiative energy loss, we compute ${R}_{AA}$ perturbative QCD-based formalism, higher twist scheme. transverse momentum diffusion coefficient...
The event generator based on the higher-twist energy loss formalism---Modular All Twist Transverse-scattering Elastic-drag and Radiation (Matter)---is further developed coupled to a hydrodynamic model for studying jet modification in relativistic nuclear collisions. probability of parton splitting is calculated using Sudakov form factor that constructed by combination vacuum medium-induced functions; full showers are simulated, including both energy-momentum space-time evolutions all...
The transverse broadening of jets produced in deep-inelastic scattering (DIS) off a large nucleus is studied the collinear limit. A class medium enhanced higher twist corrections are resummed to calculate momentum distribution jet. In contrast previous approaches, resummation leading length shown lead two-dimensional diffusion equation for propagating Results average obtained from this approach then compared expected classical Langevin analysis propagation jet under action fluctuating color...
We present a framework where first-principles calculations of jet modification may be carried out in nonperturbative thermal environment. As an example this approach, we compute the leading-order contribution to transverse momentum broadening high-energy (near on-shell) quark medium. This involves factorization operator product from perturbative process scattering quark. An expansion is and related via dispersion relations expectation local operators. These operators are then evaluated...
We consider the case, in QCD, of a single jet propagating within strongly interacting fluid, finite extent. Interactions lead to appearance source energy-momentum fluid. The remnant that escapes container is analyzed along with portions medium excited by jet. study effect static versus semi-realistic expanding medium, jets traveling inward outward. response via recoils partonic scatterings based on weakly-coupled description and its combination hydrodynamical strongly-coupled description,...
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 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...