Spectral properties of bottomonium at high temperature: a systematic investigation

Skullerud, Jon-Ivar; Aarts, Gert; Allton, Chris; Anwar, Naeem; Bignell, Ryan; Burns, Timothy; D'arcy, Rachel Horohan; Jäger, Benjamin; Kim, Seyong; Lombardo, Maria Paola; Page, Ben; Ryan, Sinead M.; Smecca, Antonio; Spriggs, Tom

doi:10.22323/1.483.0160

Conference Paper/Proceeding/Abstract 72 views 9 downloads

Spectral properties of bottomonium at high temperature: a systematic investigation

Jon-Ivar Skullerud, Gert Aarts

, Chris Allton

, Naeem Anwar

, Ryan Bignell, Timothy Burns

, Rachel Horohan D'arcy, Benjamin Jäger, Seyong Kim, Maria Paola Lombardo, Ben Page, Sinead M. Ryan, Antonio Smecca, Tom Spriggs

Proceedings of The XVIth Quark Confinement and the Hadron Spectrum Conference — PoS(QCHSC24), Volume: 483, Start page: 160

Swansea University Authors: Gert Aarts , Chris Allton , Naeem Anwar , Timothy Burns

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DOI (Published version): 10.22323/1.483.0160

Abstract

We investigate spectral features of bottomonium at high temperature, in particular the thermal mass shift and width of ground state S-wave and P-wave state. We employ and compare a range of methods for determining these features from lattice NRQCD correlators, including direct correlator analyses (m...

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Published in:	Proceedings of The XVIth Quark Confinement and the Hadron Spectrum Conference — PoS(QCHSC24)
ISSN:	1824-8039
Published:	Trieste, Italy Sissa Medialab 2025
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa70967

first_indexed	2025-11-22T22:01:17Z
last_indexed	2026-01-16T05:32:51Z
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We employ and compare a range of methods for determining these features from lattice NRQCD correlators, including direct correlator analyses (multi-exponential fits and moments of spectral functions), linear methods (Backus-Gilbert, Tikhonov and HLT methods), and Bayesian methods for spectral function reconstruction (MEM and BR). 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This work used the DiRAC Data Intensive service (DIaL2 and DIaL) at the University of Leicester, managed by the University of Leicester Research Computing Service on behalf of the STFC DiRAC HPC Facility (www.dirac.ac.uk). The DiRAC service at Leicester was funded by BEIS, UKRI and STFC capital funding and STFC operations grants. This work used the DiRAC Extreme Scaling service (Tesseract) at the University of Edinburgh, managed by the Edinburgh Parallel Computing Centre on behalf of the STFC DiRAC HPC Facility (www.dirac.ac.uk). The DiRAC service at Edinburgh was funded by BEIS, UKRI and STFC capital funding and STFC operations grants. DiRAC is part of the UKRI Digital Research Infrastructure. This work was performed using the PRACE Marconi-KNL resources hosted by CINECA, Italy. We acknowledge the support of the Supercomputing Wales project, which is part-funded by the European Regional Development Fund (ERDF) via Welsh Government, and the University of Southern Denmark for use of computing facilities. This work is supported by STFC grant ST/X000648/1 and The Royal Society Newton International Fellowship. RB acknowledges support from a Science Foundation Ireland Frontiers for the Future Project award with grant number SFI-21/FFP-P/10186. 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spelling	2026-01-15T16:45:25.2567095 v2 70967 2025-11-22 Spectral properties of bottomonium at high temperature: a systematic investigation 1ba0dad382dfe18348ec32fc65f3f3de 0000-0002-6038-3782 Gert Aarts Gert Aarts true false de706a260fa1e1e47430693e135f41c7 0000-0003-0795-124X Chris Allton Chris Allton true false 5bc959853ea1ac141e88196468cd6d3e 0000-0002-9774-8781 Naeem Anwar Naeem Anwar true false 00c358e0adea90df98f1d4a5188cb3ed 0000-0002-7201-6437 Timothy Burns Timothy Burns true false 2025-11-22 BGPS We investigate spectral features of bottomonium at high temperature, in particular the thermal mass shift and width of ground state S-wave and P-wave state. We employ and compare a range of methods for determining these features from lattice NRQCD correlators, including direct correlator analyses (multi-exponential fits and moments of spectral functions), linear methods (Backus-Gilbert, Tikhonov and HLT methods), and Bayesian methods for spectral function reconstruction (MEM and BR). We comment on the reliability and limitations of the various methods. Conference Paper/Proceeding/Abstract Proceedings of The XVIth Quark Confinement and the Hadron Spectrum Conference — PoS(QCHSC24) 483 160 Sissa Medialab Trieste, Italy 1824-8039 27 10 2025 2025-10-27 10.22323/1.483.0160 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University We acknowledge EuroHPC Joint Undertaking for awarding the project EHPC-EXT-2023E01- 010 access to LUMI-C, Finland. This work used the DiRAC Data Intensive service (DIaL2 and DIaL) at the University of Leicester, managed by the University of Leicester Research Computing Service on behalf of the STFC DiRAC HPC Facility (www.dirac.ac.uk). The DiRAC service at Leicester was funded by BEIS, UKRI and STFC capital funding and STFC operations grants. This work used the DiRAC Extreme Scaling service (Tesseract) at the University of Edinburgh, managed by the Edinburgh Parallel Computing Centre on behalf of the STFC DiRAC HPC Facility (www.dirac.ac.uk). The DiRAC service at Edinburgh was funded by BEIS, UKRI and STFC capital funding and STFC operations grants. DiRAC is part of the UKRI Digital Research Infrastructure. This work was performed using the PRACE Marconi-KNL resources hosted by CINECA, Italy. We acknowledge the support of the Supercomputing Wales project, which is part-funded by the European Regional Development Fund (ERDF) via Welsh Government, and the University of Southern Denmark for use of computing facilities. This work is supported by STFC grant ST/X000648/1 and The Royal Society Newton International Fellowship. RB acknowledges support from a Science Foundation Ireland Frontiers for the Future Project award with grant number SFI-21/FFP-P/10186. RHD acknowledges support from Taighde Éireann – Research Ireland under Grant number GOIPG/2024/3507. 2026-01-15T16:45:25.2567095 2025-11-22T16:53:59.0650714 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Jon-Ivar Skullerud 1 Gert Aarts 0000-0002-6038-3782 2 Chris Allton 0000-0003-0795-124X 3 Naeem Anwar 0000-0002-9774-8781 4 Ryan Bignell 5 Timothy Burns 0000-0002-7201-6437 6 Rachel Horohan D'arcy 7 Benjamin Jäger 8 Seyong Kim 9 Maria Paola Lombardo 10 Ben Page 11 Sinead M. Ryan 12 Antonio Smecca 13 Tom Spriggs 14 70967__36009__284eda81f8074df593a118f8296a4ff6.pdf 70967.VoR.pdf 2026-01-15T16:18:21.8824090 Output 1573521 application/pdf Version of Record true © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). true eng https://creativecommons.org/licenses/by-nc-nd/4.0/deed.en
title	Spectral properties of bottomonium at high temperature: a systematic investigation
spellingShingle	Spectral properties of bottomonium at high temperature: a systematic investigation Gert Aarts Chris Allton Naeem Anwar Timothy Burns
title_short	Spectral properties of bottomonium at high temperature: a systematic investigation
title_full	Spectral properties of bottomonium at high temperature: a systematic investigation
title_fullStr	Spectral properties of bottomonium at high temperature: a systematic investigation
title_full_unstemmed	Spectral properties of bottomonium at high temperature: a systematic investigation
title_sort	Spectral properties of bottomonium at high temperature: a systematic investigation
author_id_str_mv	1ba0dad382dfe18348ec32fc65f3f3de de706a260fa1e1e47430693e135f41c7 5bc959853ea1ac141e88196468cd6d3e 00c358e0adea90df98f1d4a5188cb3ed
author_id_fullname_str_mv	1ba0dad382dfe18348ec32fc65f3f3de_*_Gert Aarts de706a260fa1e1e47430693e135f41c7__Chris Allton 5bc959853ea1ac141e88196468cd6d3e__Naeem Anwar 00c358e0adea90df98f1d4a5188cb3ed_*_Timothy Burns
author	Gert Aarts Chris Allton Naeem Anwar Timothy Burns
author2	Jon-Ivar Skullerud Gert Aarts Chris Allton Naeem Anwar Ryan Bignell Timothy Burns Rachel Horohan D'arcy Benjamin Jäger Seyong Kim Maria Paola Lombardo Ben Page Sinead M. Ryan Antonio Smecca Tom Spriggs
format	Conference Paper/Proceeding/Abstract
container_title	Proceedings of The XVIth Quark Confinement and the Hadron Spectrum Conference — PoS(QCHSC24)
container_volume	483
container_start_page	160
publishDate	2025
institution	Swansea University
issn	1824-8039
doi_str_mv	10.22323/1.483.0160
publisher	Sissa Medialab
college_str	Faculty of Science and Engineering
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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	We investigate spectral features of bottomonium at high temperature, in particular the thermal mass shift and width of ground state S-wave and P-wave state. We employ and compare a range of methods for determining these features from lattice NRQCD correlators, including direct correlator analyses (multi-exponential fits and moments of spectral functions), linear methods (Backus-Gilbert, Tikhonov and HLT methods), and Bayesian methods for spectral function reconstruction (MEM and BR). We comment on the reliability and limitations of the various methods.
published_date	2025-10-27T05:34:05Z
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Spectral properties of bottomonium at high temperature: a systematic investigation

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