C. Nattrass
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View article: Transport-based initial conditions for heavy-ion collisions at finite densities
Transport-based initial conditions for heavy-ion collisions at finite densities Open
We employ the SMASH transport model to provide event-by-event initial conditions for the energy-momentum tensor and conserved charge currents in hydrodynamic simulations of relativistic heavy-ion collisions. We study the fluctuations and d…
View article: Interplay of prompt and non-prompt photons in photon-triggered jet observables
Interplay of prompt and non-prompt photons in photon-triggered jet observables Open
Prompt photons are important yet challenging to observe in relativistic heavy-ion collisions, as they are produced in the early stages and traverse almost the entire QGP medium without interaction. Experimental analyses typically employ is…
View article: Soft-hard framework with exact four-momentum conservation for small systems
Soft-hard framework with exact four-momentum conservation for small systems Open
A new framework, called , for the combined study of both hard and soft transverse momentum sectors in high-energy proton-proton (p−p) and proton-nucleus (p−A) collisions is set up. A dynamical initial state is set up using the model with t…
View article: Bayesian inference analysis of jet quenching using inclusive jet and hadron suppression measurements
Bayesian inference analysis of jet quenching using inclusive jet and hadron suppression measurements Open
The Collaboration reports a new determination of the jet transport parameter q̂ in the quark-gluon plasma (QGP) using Bayesian inference, incorporating all available inclusive hadron and jet yield suppression data measured in heavy-ion coll…
View article: Hard jet substructure in a multistage approach
Hard jet substructure in a multistage approach Open
We present predictions and postdictions for a wide variety of hard jet-substructure observables using a multistage model within the framework. The details of the multistage model and the various parameter choices are described in []. A nov…
View article: Bayesian Inference analysis of jet quenching using inclusive jet and hadron suppression measurements
Bayesian Inference analysis of jet quenching using inclusive jet and hadron suppression measurements Open
The JETSCAPE Collaboration reports a new determination of the jet transport parameter $\hat{q}$ in the Quark-Gluon Plasma (QGP) using Bayesian Inference, incorporating all available inclusive hadron and jet yield suppression data measured …
View article: New metric improving Bayesian calibration of a multistage approach studying hadron and inclusive jet suppression
New metric improving Bayesian calibration of a multistage approach studying hadron and inclusive jet suppression Open
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 for…
View article: A multistage framework for studying the evolution of jets and high-pT probes in small collision systems
A multistage framework for studying the evolution of jets and high-pT probes in small collision systems Open
Understanding the modification of jets and high-$p_T$ probes in small systems requires the integration of soft and hard physics. We present recent developments in extending the JETSCAPE framework to build an event generator, which includes…
View article: Hybrid Hadronization of Jet Showers from $e^++𝑒^−$ to $𝐴 + 𝐴$ with JETSCAPE
Hybrid Hadronization of Jet Showers from $e^++𝑒^−$ to $𝐴 + 𝐴$ with JETSCAPE Open
In this talk we review jet production in a large variety of collision systems using the JETSCAPE event generator and Hybrid Hadronization. Hybrid Hadronization combines quark recombination, applicable when distances between partons in phas…
View article: Multiscale evolution of heavy flavor in the QGP
Multiscale evolution of heavy flavor in the QGP Open
Shower development dynamics for a jet traveling through the quark-gluon plasma (QGP) is a multiscale process, where the heavy flavor mass is an important scale. During the high virtuality portion of the jet evolution in the QGP, emission o…
View article: Effects of multi-scale jet-medium interactions on jet substructures
Effects of multi-scale jet-medium interactions on jet substructures Open
We utilize event-by-event Monte Carlo simulations within the JETSCAPE framework to examine scale-dependent jet-medium interactions in heavy-ion collisions. The reduction in jet-medium interaction during the early high-virtuality stage, whe…
View article: Multiplicity Based Background Subtraction for Jets in Heavy Ion Collisions
Multiplicity Based Background Subtraction for Jets in Heavy Ion Collisions Open
Jet measurements in heavy ion collisions at low jet momentum can provide constraints on the properties of the quark gluon plasma but are overwhelmed by a significant, fluctuating background. We build upon our previous work which demonstrat…
View article: Photon-triggered jets as probes of multi-stage jet modification
Photon-triggered jets as probes of multi-stage jet modification Open
Prompt photons are created in the early stages of heavy ion collisions and traverse the QGP medium without any interaction. Therefore, photon-triggered jets can be used to study the jet quenching in the QGP medium. In this work, photon-tri…
View article: Measuring jet quenching with a Bayesian inference analysis of hadron and jet data by JETSCAPE
Measuring jet quenching with a Bayesian inference analysis of hadron and jet data by JETSCAPE Open
The JETSCAPE Collaboration reports the first multi-messenger study of the QGP jet transport parameter $\hat{q}$ using Bayesian inference, incorporating all available hadron and jet inclusive yield and jet substructure data from RHIC and th…
View article: Results from PHENIX
Results from PHENIX Open
The PHENIX experiment at the Relatimay invistic Heavy Ion Collider has collected data scanning system sizes from p + p and 3 He+Au to Au+Au and U+U at collision energies from √ S NN = 7.7 to 510 GeV. The extensive measurements from these d…
View article: 3D Multi-system Bayesian Calibration with Energy Conservation to Study Rapidity-dependent Dynamics of Nuclear Collisions
3D Multi-system Bayesian Calibration with Energy Conservation to Study Rapidity-dependent Dynamics of Nuclear Collisions Open
Considerable information about the early-stage dynamics of heavy-ion collisions is encoded in the rapidity dependence of measurements. To leverage the large amount of experimental data, we perform a systematic analysis using three-dimensio…
View article: Interpretable machine learning methods applied to jet background subtraction in heavy-ion collisions
Interpretable machine learning methods applied to jet background subtraction in heavy-ion collisions Open
Jet measurements in heavy ion collisions can provide constraints on the properties of the quark gluon plasma, but the kinematic reach is limited by a large, fluctuating background. We present a novel application of symbolic regression to e…
View article: Separating signal from combinatorial jets in a high-background environment
Separating signal from combinatorial jets in a high-background environment Open
We study procedures for discriminating combinatorial jets in a high background environment, such as a heavy-ion collision from signal jets arising from a hard scattering. We investigate a population of jets clustered from a combined pythia…
View article: A multistage framework for studying the evolution of jets and high-$p_T$ probes in small collision systems
A multistage framework for studying the evolution of jets and high-$p_T$ probes in small collision systems Open
Understanding the modification of jets and high-$p_T$ probes in small systems requires the integration of soft and hard physics. We present recent developments in extending the JETSCAPE framework to build an event generator, which includes…
View article: Multiscale evolution of heavy flavor in the QGP
Multiscale evolution of heavy flavor in the QGP Open
Shower development dynamics for a jet traveling through the quark-gluon plasma (QGP) is a multiscale process, where the heavy flavor mass is an important scale. During the high virtuality portion of the jet evolution in the QGP, emission o…
View article: A new metric improving Bayesian calibration of a multistage approach studying hadron and inclusive jet suppression
A new metric improving Bayesian calibration of a multistage approach studying hadron and inclusive jet suppression Open
We study parton energy-momentum exchange with the quark gluon plasma (QGP) within a multistage approach composed of in-medium DGLAP evolution at high virtuality, and (linearized) Boltzmann Transport formalism at lower virtuality. This mult…
View article: Effects of multi-scale jet-medium interactions on jet substructures
Effects of multi-scale jet-medium interactions on jet substructures Open
We utilize event-by-event Monte Carlo simulations within the JETSCAPE framework to examine scale-dependent jet-medium interactions in heavy-ion collisions. The reduction in jet-medium interaction during the early high-virtuality stage, whe…
View article: Multiscale evolution of charmed particles in a nuclear medium
Multiscale evolution of charmed particles in a nuclear medium Open
Parton energy-momentum exchange with the quark gluon plasma (QGP) is a multiscale problem. In this work, we calculate the interaction of charm quarks with the QGP within the higher twist formalism at high virtuality and high energy using t…
View article: Inclusive jet and hadron suppression in a multistage approach
Inclusive jet and hadron suppression in a multistage approach Open
We present a new study of jet interactions in the quark-gluon plasma created in high-energy heavy-ion collisions, using a multistage event generator within the jetscape framework. We focus on medium-induced modifications in the rate of inc…
View article: Interpretable Machine Learning Methods Applied to Jet Background Subtraction in Heavy Ion Collisions
Interpretable Machine Learning Methods Applied to Jet Background Subtraction in Heavy Ion Collisions Open
Jet measurements in heavy ion collisions can provide constraints on the properties of the quark gluon plasma, but the kinematic reach is limited by a large, fluctuating background. We present a novel application of symbolic regression to e…
View article: Separating signal from combinatorial jets in a high background environment
Separating signal from combinatorial jets in a high background environment Open
We study procedures for discriminating combinatorial jets in a high background environment, such as a heavy ion collision, from signal jets arising from a hard-scattering. We investigate a population of jets clustered from a combined PYTHI…
View article: Hard jet substructure in a multistage approach
Hard jet substructure in a multistage approach Open
We present predictions and postdictions for a wide variety of hard jet-substructure observables using a multistage model within the JETSCAPE framework. The details of the multistage model and the various parameter choices are described in …
View article: Comprehensive Study of Multi-scale Jet-medium Interaction
Comprehensive Study of Multi-scale Jet-medium Interaction Open
We explore jet-medium interactions at various scales in high-energy heavy-ion collisions using the JETSCAPE framework. The physics of the multi-stage modeling and the coherence effect at high virtuality is discussed through the results of …
View article: A tale of two jets
A tale of two jets Open
We used model studies to investigate approaches to distin-guish signal and combinatorial jets.
View article: Demographic study of major conferences in heavy ion physics
Demographic study of major conferences in heavy ion physics Open
We present a study of the demographics of major conferences in heavy ion physics. We look at the distribution of talks by gender for Quark Matter, Strangeness in Quark Matter, Initial Stages, and Hard Probes between 2011–2022. We find that…