Date of Award

Spring 1-1-2017

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Physics

First Advisor

Paul Romatschke

Second Advisor

James L. Nagle

Third Advisor

Andrew J. Hamilton

Fourth Advisor

Anna Hasenfratz

Fifth Advisor

Dennis Perepelitsa

Abstract

In this thesis, various theoretical results surrounding the quark--gluon plasma which is created in the ultrarelativistic collisions of ions are presented. The many-body, strong-coupling, and real-time characteristics of those collisions partially exclude first-principle quantum chromodynamics calculations, whereas the effective theory of hydrodynamics allows for a rather successful description of the quark--gluon plasma. A criterion of hydrodynamic stability is used to restrict the transport coefficient bulk viscosity. In addition, various collisional systems over a wide range of energy are successfully modeled for particle spectra, yields, flow coefficients, and HBT radii. Despite questions of hydrodynamic applicability to few-particle systems, there is reasonable agreement with experimental data for p+p collisions in this framework. Notably, the strong dependence on the bulk viscosity of simulation results for p+p collisions could help constrain this transport coefficient. All of those aspects solidify our quantitative understanding of the quark--gluon plasma produced in ion collisions.

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Physics Commons

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