Thermal QCD spectrum and potential: bottomonium at non-zero temperature

SPRIGGS, THOMAS

doi:10.23889/SUthesis.65442

E-Thesis 749 views 221 downloads

Thermal QCD spectrum and potential: bottomonium at non-zero temperature / THOMAS SPRIGGS

Swansea University Author: THOMAS SPRIGGS

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DOI (Published version): 10.23889/SUthesis.65442

Abstract

The spectrum and potential of bottomonium mesons offer windows into strong force phenomenology. This thesis investigates these two constructs at non-zero temperature to explore thermal modifications of bound states. Lattice simulations are performed on two generations of the FASTSUM ensembles using...

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Published:	Swansea, Wales, UK 2023
Institution:	Swansea University
Degree level:	Doctoral
Degree name:	Ph.D
Supervisor:	Allton, C; Burns, T
URI:	https://cronfa.swan.ac.uk/Record/cronfa65442

first_indexed	2024-01-11T11:52:27Z
last_indexed	2024-11-25T14:16:05Z
id	cronfa65442
recordtype	RisThesis
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spelling	2024-04-12T11:25:25.0170451 v2 65442 2024-01-11 Thermal QCD spectrum and potential: bottomonium at non-zero temperature 31db7a33e898084e6507e1311cadfe66 THOMAS SPRIGGS THOMAS SPRIGGS true false 2024-01-11 The spectrum and potential of bottomonium mesons offer windows into strong force phenomenology. This thesis investigates these two constructs at non-zero temperature to explore thermal modifications of bound states. Lattice simulations are performed on two generations of the FASTSUM ensembles using a nonrelativistic effective field theory of quantum chromodynamics, NRQCD. These ensembles contain 2+1 flavours of dynamical sea quarks at temperatures spanning the pseudocritical temperature. Maximum likelihood estimation is used to recover the spectrum of two representative bottomonium states, Υ and χb1, from which the ground state mass and width are determined at non-zero temperature. The central and spin-dependent potentials between the bottom quark and antiquarkare calculated using the approach from the HAL QCD collaboration. The standard implementation is used and then significant improvements are presented that provide a validation of the use of the non-relativistic Schrödinger equation at non-zero temperature. E-Thesis Swansea, Wales, UK Lattice field theory, particle physics, bottomonium, hadron spectroscopy 7 12 2023 2023-12-07 10.23889/SUthesis.65442 Part of this thesis has been redacted to protect personal information COLLEGE NANME COLLEGE CODE Swansea University Allton, C; Burns, T Doctoral Ph.D STFC CDT UKRI, STFC CDT. 2024-04-12T11:25:25.0170451 2024-01-11T11:40:53.7336675 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics THOMAS SPRIGGS 1 65442__29433__6308c4961cc641df8e67fb4abf62a7d0.pdf 2023_Spriggs_T.final.65442.pdf 2024-01-11T12:12:19.1090383 Output 6313871 application/pdf E-Thesis – open access true Distributed under the terms of a Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0). Copyright; The author, Thomas Spriggs, 2024. true eng https://creativecommons.org/licenses/by-sa/4.0/deed.en
title	Thermal QCD spectrum and potential: bottomonium at non-zero temperature
spellingShingle	Thermal QCD spectrum and potential: bottomonium at non-zero temperature THOMAS SPRIGGS
title_short	Thermal QCD spectrum and potential: bottomonium at non-zero temperature
title_full	Thermal QCD spectrum and potential: bottomonium at non-zero temperature
title_fullStr	Thermal QCD spectrum and potential: bottomonium at non-zero temperature
title_full_unstemmed	Thermal QCD spectrum and potential: bottomonium at non-zero temperature
title_sort	Thermal QCD spectrum and potential: bottomonium at non-zero temperature
author_id_str_mv	31db7a33e898084e6507e1311cadfe66
author_id_fullname_str_mv	31db7a33e898084e6507e1311cadfe66_***_THOMAS SPRIGGS
author	THOMAS SPRIGGS
author2	THOMAS SPRIGGS
format	E-Thesis
publishDate	2023
institution	Swansea University
doi_str_mv	10.23889/SUthesis.65442
college_str	Faculty of Science and Engineering
hierarchytype
hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
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description	The spectrum and potential of bottomonium mesons offer windows into strong force phenomenology. This thesis investigates these two constructs at non-zero temperature to explore thermal modifications of bound states. Lattice simulations are performed on two generations of the FASTSUM ensembles using a nonrelativistic effective field theory of quantum chromodynamics, NRQCD. These ensembles contain 2+1 flavours of dynamical sea quarks at temperatures spanning the pseudocritical temperature. Maximum likelihood estimation is used to recover the spectrum of two representative bottomonium states, Υ and χb1, from which the ground state mass and width are determined at non-zero temperature. The central and spin-dependent potentials between the bottom quark and antiquarkare calculated using the approach from the HAL QCD collaboration. The standard implementation is used and then significant improvements are presented that provide a validation of the use of the non-relativistic Schrödinger equation at non-zero temperature.
published_date	2023-12-07T05:14:14Z
_version_	1851549972659437568
score	11.090071

Thermal QCD spectrum and potential: bottomonium at non-zero temperature / THOMAS SPRIGGS

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