Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


Jia Liu dissertation.pdf (18.7 MB)

ETD Abstract Container

Abstract Header

Pre-equilibrium evolution effects on relativistic heavy-ion collision observables

Liu, Jia
http://rave.ohiolink.edu/etdc/view?acc_num=osu1449185522

Abstract Details

2015, Doctor of Philosophy, Ohio State University, Physics.
In this thesis, we improve several aspects of the standard model of relativistic heavy-ion collisions. We include a pre-equilibrium dynamical stage and study it in the strong and weak coupling limits. We stress the importance of this stage on the later hydrodynamic evolution as well as on the mean transverse momenta, transverse momentum distributions and anisotropic flow coefficients of directly emitted hadrons. In order to properly address the bulk viscosity, we update the hydrodynamic equations within the boost-invariant viscous hydrodynamic simulation program VISH2+1 to a more complete set of equations that includes non-linear terms related to the shear stress tensor and bulk pressure. The importance of each non-linear term is discussed. With the understanding that the effects of tunable parameters in the heavy-ion simulation model on physical observables are entangled, we optimize them simultaneously. We perform such optimizations for Pb + Pb collisions at the Large Hadron Collider (LHC) for both Monte Carlo Kharzeev-Levin-Nardi (MC-KLN) and Monte Carlo Glauber (MC-Glb) initial-state models. In a first stage we test the parameter optimization routine with zero bulk viscosity and without the hadronic after-burner. This sets the baseline for subsequent searches including the hadronic after-burner and a non-zero bulk viscosity. We report the preferred parameter ranges and compare them across different initial-state models, with and without pre-equilibrium dynamics. The parameter space for the runs with hadronic after-burner is further explored within a Bayesian approach. Using a Markov Chain Monte Carlo routine we determine the posterior probability distribution of each parameter and assign quantitative uncertainty ranges to them.
Ulrich Heinz (Advisor)
Michael Lisa (Committee Member)
Robert Perry (Committee Member)
Junko Shigemitsu (Committee Member)
176 p.
Nuclear Physics; Physics; Theoretical Physics
relativistic heavy-ion collisions; viscous hydrodynamics; specific shear viscosity; specific bulk viscosity

Recommended Citations

Citations

  • Liu, J. (2015). Pre-equilibrium evolution effects on relativistic heavy-ion collision observables [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449185522

    APA Style (7th edition)

  • Liu, Jia. Pre-equilibrium evolution effects on relativistic heavy-ion collision observables. 2015. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1449185522.

    MLA Style (8th edition)

  • Liu, Jia. "Pre-equilibrium evolution effects on relativistic heavy-ion collision observables." Doctoral dissertation, Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449185522

    Chicago Manual of Style (17th edition)

osu1449185522
351
© 2015, some rights reserved.Creative Commons License Pre-equilibrium evolution effects on relativistic heavy-ion collision observables by Jia Liu is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by The Ohio State University and OhioLINK.