Characterization of the Transition Region in the QCD Phase Diagram

dc.contributor.advisorRatti, Claudia
dc.contributor.committeeMemberGunaratne, Gemunu H.
dc.contributor.committeeMemberLabate, Demetrio
dc.contributor.committeeMemberTimmins, Anthony
dc.contributor.committeeMemberKoerner, Lisa W.
dc.creatorParotto, Paolo 1989-
dc.date.accessioned2020-01-04T03:53:49Z
dc.date.createdMay 2019
dc.date.issued2019-05
dc.date.submittedMay 2019
dc.date.updated2020-01-04T03:53:50Z
dc.description.abstractThe study of the Quantum Chromodynamics (QCD) phase diagram has been the object of great effort in the scientific community both from theory and experiment, and has been investigated from first principles through lattice simulations in the low density regime. The transition between ordinary matter and a deconfined Quark Gluon Plasma was shown from lattice QCD to be a smooth crossover. It is probed experimentally in relativistic heavy-ion collisions at the Brookhaven National Laboratiory (BNL) and CERN, where sufficiently high temperatures are reached to create such a system. This transition is believed to become of the first order at large baryon density, implying the existence of a critical point. The search for such a point is the main goal of the second Beam Energy Scan (BES-II) program at BNL. In this dissertation, I focus on the transition region of the QCD phase diagram by calculating several observables with different theoretical approaches. In the first part of this work, I study the moment in heavy-ion collisions at which the chemical composition of the system is fixed: the chemical freeze-out. I compare net-particle fluctuations calculated in the Hadron Resonance Gas (HRG) model to experimental data to determine the chemical freeze-out temperature, with particular attention on the dependence of such temperature on the flavor composition of the particles. A separate analysis is performed to study the content of the hadron spectrum, through a comparison of HRG model and lattice QCD results. I also generate a family of Equations of State (EoS) for QCD matching lattice calculations at low baryon density, and including a critical point in the correct universality class. Moreover, I investigate the consequences of the critical point on measurable quantities, providing guidance for the forthcoming data from the BES. Finally, in light of the recent extension of hydrodynamic simulations to include all conserved charges of strong interactions, I produce an EoS for QCD that depends on all three chemical potentials. I then study the impact of these additional conserved charges on the thermodynamics when realistic conditions on the composition of the system are imposed.
dc.description.departmentPhysics, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.citationPortions of this document appear in: Alba, Paolo, Rene Bellwied, Szabolcs Borsányi, Zoltan Fodor, Jana Günther, Sandor D. Katz, Valentina Mantovani Sarti et al. "Constraining the hadronic spectrum through QCD thermodynamics on the lattice." Physical Review D 96, no. 3 (2017): 034517. And in: Bellwied, Rene, Jacquelyn Noronha-Hostler, Paolo Parotto, I. Portillo Vazquez, Claudia Ratti, and Jamie M. Stafford. "Freeze-out temperature from net-kaon fluctuations at energies available at the BNL Relativistic Heavy Ion Collider." Physical Review C 99, no. 3 (2019): 034912.
dc.identifier.urihttps://hdl.handle.net/10657/5785
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. UH Libraries has secured permission to reproduce any and all previously published materials contained in the work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectQuark-gluon plasma
dc.subjectHeavy-Ion Collisions
dc.subjectEquation of State
dc.titleCharacterization of the Transition Region in the QCD Phase Diagram
dc.type.dcmiText
dc.type.genreThesis
local.embargo.lift2021-05-01
local.embargo.terms2021-05-01
thesis.degree.collegeCollege of Natural Sciences and Mathematics
thesis.degree.departmentPhysics, Department of
thesis.degree.disciplinePhysics
thesis.degree.grantorUniversity of Houston
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
PAROTTO-DISSERTATION-2019.pdf
Size:
6.19 MB
Format:
Adobe Portable Document Format
License bundle
Now showing 1 - 2 of 2
No Thumbnail Available
Name:
PROQUEST_LICENSE.txt
Size:
4.43 KB
Format:
Plain Text
Description:
No Thumbnail Available
Name:
LICENSE.txt
Size:
1.81 KB
Format:
Plain Text
Description: