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The NRQCD Υ spectrum at non-zero temperatures using Backus-Gilbert regularisations
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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...
| Published in: | Proceedings of The 41st International Symposium on Lattice Field Theory — PoS(LATTICE2024) |
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| ISSN: | 1824-8039 |
| Published: |
Trieste, Italy
Sissa Medialab
2025
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa70969 |
| 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 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. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
This work is supported by the UKRI Science and Technology Facilities Council (STFC) Consolidated Grant No. ST/X000648/1. |
| Start Page: |
197 |