Estimating nucleon substructure properties in a unified model of p-Pb and Pb-Pb collisions
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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Duke Univ., Durham, NC (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- FG02-05ER41367
- OSTI ID:
- 1543577
- Journal Information:
- Nuclear Physics. A, Vol. 982, Issue C; ISSN 0375-9474
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
| Proton shape fluctuations and its relation to DIS | preprint | January 2018 |
| Initial conditions of bulk matter in ultrarelativistic nuclear collisions | preprint | January 2019 |
Similar Records
One fluid to rule them all: Viscous hydrodynamic description of event-by-event central p+p, p+Pb and Pb+Pb collisions at TeV
Elliptic flow in {radical}(s)=200 GeV Au+Au collisions and {radical}(s)=2.76 TeV Pb+Pb collisions: Insights from viscous hydrodynamics+hadron cascade hybrid model