The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations

Smecca, Antonio; Aarts, Gert; Allton, Chris; Bignell, Ryan; Burns, Timothy; Jäger, Benjamin; D’Arcy, Rachel; Kim, Seyong; Lombardo, Maria-Paola; Page, Ben; Ryan, Sinead; Spriggs, Tom; Skullerud, Jon-Ivar

doi:10.22323/1.466.0197

Conference Paper/Proceeding/Abstract 69 views 7 downloads

The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations

Antonio Smecca, Gert Aarts

, Chris Allton

, Ryan Bignell, Timothy Burns

, Benjamin Jäger, Rachel D’Arcy, Seyong Kim, Maria-Paola Lombardo, Ben Page, Sinead Ryan, Tom Spriggs, Jon-Ivar Skullerud

Proceedings of The 41st International Symposium on Lattice Field Theory — PoS(LATTICE2024), Volume: 466, Start page: 197

Swansea University Authors: Antonio Smecca, Gert Aarts , Chris Allton , Timothy Burns

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DOI (Published version): 10.22323/1.466.0197

Abstract

Understanding how the properties of heavy mesons change as temperature increases is crucial for gaining valuable insights into the quark-gluon plasma. Information about meson masses and decay widths is encoded in the meson spectral function, which, in principle, can be extracted from Euclidean corre...

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Published in:	Proceedings of The 41st International Symposium on Lattice Field Theory — PoS(LATTICE2024)
ISSN:	1824-8039
Published:	Trieste, Italy Sissa Medialab 2025
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa70969

first_indexed	2025-11-22T22:01:17Z
last_indexed	2026-01-17T05:33:02Z
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spelling	2026-01-16T10:15:28.2087525 v2 70969 2025-11-22 The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations 9345a6afbdec2a30c155b7a154e7e3de Antonio Smecca Antonio Smecca true false 1ba0dad382dfe18348ec32fc65f3f3de 0000-0002-6038-3782 Gert Aarts Gert Aarts true false de706a260fa1e1e47430693e135f41c7 0000-0003-0795-124X Chris Allton Chris Allton true false 00c358e0adea90df98f1d4a5188cb3ed 0000-0002-7201-6437 Timothy Burns Timothy Burns true false 2025-11-22 BGPS Understanding how the properties of heavy mesons change as temperature increases is crucial for gaining valuable insights into the quark-gluon plasma. Information about meson masses and decay widths is encoded in the meson spectral function, which, in principle, can be extracted from Euclidean correlation functions via generalised Laplace transformations. However, this inverse problem is ill-posed for lattice correlation functions and requires regularisation. In this work, we present the latest results for bottomonium spectral functions obtained within the lattice NRQCD framework using the Backus-Gilbert regularisation, along with two other variants, one of which is commonly referred to as the HLT method. Our analysis employs Generation 2L anisotropic lattice configurations produced by the \textsc{Fastsum} collaboration. Conference Paper/Proceeding/Abstract Proceedings of The 41st International Symposium on Lattice Field Theory — PoS(LATTICE2024) 466 197 Sissa Medialab Trieste, Italy 1824-8039 18 12 2025 2025-12-18 10.22323/1.466.0197 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University This work is supported by the UKRI Science and Technology Facilities Council (STFC) Consolidated Grant No. ST/X000648/1. 2026-01-16T10:15:28.2087525 2025-11-22T16:55:15.6383349 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Antonio Smecca 1 Gert Aarts 0000-0002-6038-3782 2 Chris Allton 0000-0003-0795-124X 3 Ryan Bignell 4 Timothy Burns 0000-0002-7201-6437 5 Benjamin Jäger 6 Rachel D’Arcy 7 Seyong Kim 8 Maria-Paola Lombardo 9 Ben Page 10 Sinead Ryan 11 Tom Spriggs 12 Jon-Ivar Skullerud 13 70969__36018__7dbd972f312d433e91cb2451108e31a5.pdf 70969.VoR.pdf 2026-01-16T10:13:57.3767052 Output 929230 application/pdf Version of Record true Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. true eng https://creativecommons.org/licenses/by-nc-nd/4.0/
title	The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations
spellingShingle	The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations Antonio Smecca Gert Aarts Chris Allton Timothy Burns
title_short	The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations
title_full	The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations
title_fullStr	The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations
title_full_unstemmed	The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations
title_sort	The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations
author_id_str_mv	9345a6afbdec2a30c155b7a154e7e3de 1ba0dad382dfe18348ec32fc65f3f3de de706a260fa1e1e47430693e135f41c7 00c358e0adea90df98f1d4a5188cb3ed
author_id_fullname_str_mv	9345a6afbdec2a30c155b7a154e7e3de_*_Antonio Smecca 1ba0dad382dfe18348ec32fc65f3f3de__Gert Aarts de706a260fa1e1e47430693e135f41c7__Chris Allton 00c358e0adea90df98f1d4a5188cb3ed_*_Timothy Burns
author	Antonio Smecca Gert Aarts Chris Allton Timothy Burns
author2	Antonio Smecca Gert Aarts Chris Allton Ryan Bignell Timothy Burns Benjamin Jäger Rachel D’Arcy Seyong Kim Maria-Paola Lombardo Ben Page Sinead Ryan Tom Spriggs Jon-Ivar Skullerud
format	Conference Paper/Proceeding/Abstract
container_title	Proceedings of The 41st International Symposium on Lattice Field Theory — PoS(LATTICE2024)
container_volume	466
container_start_page	197
publishDate	2025
institution	Swansea University
issn	1824-8039
doi_str_mv	10.22323/1.466.0197
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	Understanding how the properties of heavy mesons change as temperature increases is crucial for gaining valuable insights into the quark-gluon plasma. Information about meson masses and decay widths is encoded in the meson spectral function, which, in principle, can be extracted from Euclidean correlation functions via generalised Laplace transformations. However, this inverse problem is ill-posed for lattice correlation functions and requires regularisation. In this work, we present the latest results for bottomonium spectral functions obtained within the lattice NRQCD framework using the Backus-Gilbert regularisation, along with two other variants, one of which is commonly referred to as the HLT method. Our analysis employs Generation 2L anisotropic lattice configurations produced by the \textsc{Fastsum} collaboration.
published_date	2025-12-18T05:34:05Z
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The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations

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