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Title: Estimating nucleon substructure properties in a unified model of p-Pb and Pb-Pb collisions

Abstract

We apply a well tested hybrid transport model, which couples viscous hydrodynamics to a hadronic afterburner, to describe bulk observables in proton-lead and lead-lead collisions at $$\sqrt{s}$$$$_ {NN}$$ = 5.02 TeV. The quark-gluon plasma (QGP) initial conditions are modeled using the parametric TRENTo model with additional nucleon substructure parameters to vary the number and size of hot spots inside each nucleon, followed by a pre-equilibrium free streaming stage to match the full energy-momentum tensor of the initial state onto viscous hydrodynamics. Initial condition and QGP medium parameters, such as the temperature dependence of the QGP shear and bulk viscosities, are then calibrated using Bayesian parameter estimation to describe charged particle yields, mean pT and anisotropic flow harmonics of both collision systems in a single self-consistent framework. We find that the hybrid model provides a compelling, simultaneous description of both collision systems using appropriately chosen model parameters, and present new posterior estimates for the size and shape of the nucleon and temperature dependence of QGP shear and bulk viscosities.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Duke Univ., Durham, NC (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Duke Univ., Durham, NC (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1543577
Grant/Contract Number:  
FG02-05ER41367
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Physics. A
Additional Journal Information:
Journal Volume: 982; Journal Issue: C; Journal ID: ISSN 0375-9474
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Physics; Bayesian; small systems; initial conditions; quark-gluon plasma

Citation Formats

Moreland, J. Scott, Bernhard, Jonah E., and Bass, Steffen A. Estimating nucleon substructure properties in a unified model of p-Pb and Pb-Pb collisions. United States: N. p., 2019. Web. doi:10.1016/j.nuclphysa.2018.07.011.
Moreland, J. Scott, Bernhard, Jonah E., & Bass, Steffen A. Estimating nucleon substructure properties in a unified model of p-Pb and Pb-Pb collisions. United States. https://doi.org/10.1016/j.nuclphysa.2018.07.011
Moreland, J. Scott, Bernhard, Jonah E., and Bass, Steffen A. Tue . "Estimating nucleon substructure properties in a unified model of p-Pb and Pb-Pb collisions". United States. https://doi.org/10.1016/j.nuclphysa.2018.07.011. https://www.osti.gov/servlets/purl/1543577.
@article{osti_1543577,
title = {Estimating nucleon substructure properties in a unified model of p-Pb and Pb-Pb collisions},
author = {Moreland, J. Scott and Bernhard, Jonah E. and Bass, Steffen A.},
abstractNote = {We apply a well tested hybrid transport model, which couples viscous hydrodynamics to a hadronic afterburner, to describe bulk observables in proton-lead and lead-lead collisions at $\sqrt{s}$$_ {NN}$ = 5.02 TeV. The quark-gluon plasma (QGP) initial conditions are modeled using the parametric TRENTo model with additional nucleon substructure parameters to vary the number and size of hot spots inside each nucleon, followed by a pre-equilibrium free streaming stage to match the full energy-momentum tensor of the initial state onto viscous hydrodynamics. Initial condition and QGP medium parameters, such as the temperature dependence of the QGP shear and bulk viscosities, are then calibrated using Bayesian parameter estimation to describe charged particle yields, mean pT and anisotropic flow harmonics of both collision systems in a single self-consistent framework. We find that the hybrid model provides a compelling, simultaneous description of both collision systems using appropriately chosen model parameters, and present new posterior estimates for the size and shape of the nucleon and temperature dependence of QGP shear and bulk viscosities.},
doi = {10.1016/j.nuclphysa.2018.07.011},
journal = {Nuclear Physics. A},
number = C,
volume = 982,
place = {United States},
year = {Tue Jan 22 00:00:00 EST 2019},
month = {Tue Jan 22 00:00:00 EST 2019}
}

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Works referenced in this record:

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