Bayesian calibration of a hybrid nuclear collision model using $$\textit{p}$$₋Pb and Pb-Pb data at energies available at the CERN Large Hadron Collider
Abstract
Here, we posit a unified hydrodynamic and microscopic description of the quark-gluon plasma (QGP) produced in ultrarelativistic p₋Pb and Pb-Pb collisions at $$\sqrt{s}_\text{NN}$$ = 5.02 TeV and evaluate our assertion using Bayesian inference. Specifically, we model the dynamics of both collision systems using initial conditions with parametric nucleon substructure, a preequilibrium free streaming stage, event-by-event viscous hydrodynamics, and a microscopic hadronic afterburner. Free parameters of the model, which describe the initial state and QGP medium are then simultaneously calibrated to fit charged-particle yields, mean $$p_T$$, and flow cumulants. We argue that the global agreement of the calibrated model with the experimental data strongly supports the existence of hydrodynamic flow in small collision systems at ultrarelativistic energies, and that the flow produced develops at length scales smaller than a single proton. Posterior estimates for the model's input parameters are obtained, and new insights into the temperature dependence of the QGP transport coefficients and event-by-event structure of the proton are discussed.
- Authors:
-
- Duke Univ., Durham, NC (United States)
- Publication Date:
- Research Org.:
- Duke Univ., Durham, NC (United States); Univ. of California, Oakland, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- OSTI Identifier:
- 1800267
- Alternate Identifier(s):
- OSTI ID: 1601076
- Grant/Contract Number:
- FG02-05ER41367; AC02-05CH11231; NSF-ACI-1550225
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 101; Journal Issue: 2; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Physics
Citation Formats
Moreland, J. Scott, Bernhard, Jonah E., and Bass, Steffen A. Bayesian calibration of a hybrid nuclear collision model using $\textit{p}$₋Pb and Pb-Pb data at energies available at the CERN Large Hadron Collider. United States: N. p., 2020.
Web. doi:10.1103/physrevc.101.024911.
Moreland, J. Scott, Bernhard, Jonah E., & Bass, Steffen A. Bayesian calibration of a hybrid nuclear collision model using $\textit{p}$₋Pb and Pb-Pb data at energies available at the CERN Large Hadron Collider. United States. https://doi.org/10.1103/physrevc.101.024911
Moreland, J. Scott, Bernhard, Jonah E., and Bass, Steffen A. Fri .
"Bayesian calibration of a hybrid nuclear collision model using $\textit{p}$₋Pb and Pb-Pb data at energies available at the CERN Large Hadron Collider". United States. https://doi.org/10.1103/physrevc.101.024911. https://www.osti.gov/servlets/purl/1800267.
@article{osti_1800267,
title = {Bayesian calibration of a hybrid nuclear collision model using $\textit{p}$₋Pb and Pb-Pb data at energies available at the CERN Large Hadron Collider},
author = {Moreland, J. Scott and Bernhard, Jonah E. and Bass, Steffen A.},
abstractNote = {Here, we posit a unified hydrodynamic and microscopic description of the quark-gluon plasma (QGP) produced in ultrarelativistic p₋Pb and Pb-Pb collisions at $\sqrt{s}_\text{NN}$ = 5.02 TeV and evaluate our assertion using Bayesian inference. Specifically, we model the dynamics of both collision systems using initial conditions with parametric nucleon substructure, a preequilibrium free streaming stage, event-by-event viscous hydrodynamics, and a microscopic hadronic afterburner. Free parameters of the model, which describe the initial state and QGP medium are then simultaneously calibrated to fit charged-particle yields, mean $p_T$, and flow cumulants. We argue that the global agreement of the calibrated model with the experimental data strongly supports the existence of hydrodynamic flow in small collision systems at ultrarelativistic energies, and that the flow produced develops at length scales smaller than a single proton. Posterior estimates for the model's input parameters are obtained, and new insights into the temperature dependence of the QGP transport coefficients and event-by-event structure of the proton are discussed.},
doi = {10.1103/physrevc.101.024911},
journal = {Physical Review C},
number = 2,
volume = 101,
place = {United States},
year = {Fri Feb 21 00:00:00 EST 2020},
month = {Fri Feb 21 00:00:00 EST 2020}
}
Web of Science
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