A comparison of spectral reconstruction methods applied to non-zero temperature NRQCD meson correlation functions
| Autor: | Thomas Spriggs, Gert Aarts, Chris Allton, Timothy Burns, Rachel Horohan D’Arcy, Benjamin Jäger, Seyong Kim, Maria-Paola Lombardo, Sam Offler, Ben Page, Sinead M. Ryan, Jon-Ivar Skullerud |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | EPJ Web of Conferences, Vol 258, p 05011 (2022) |
| ISSN: | 2100-014X |
| Popis: | We present results from the fastsum collaboration's programme to determine the spectrum of the bottomonium system as a function of temperature. Three different methods of extracting spectral information are discussed: a Maximum Likelihood approach using a Gaussian spectral function for the ground state, the Backus Gilbert method, and the Kernel Ridge Regression machine learning procedure. We employ the fastsum anisotropic lattices with 2+1 dynamical quark flavours, with temperatures ranging from 47 to 375 MeV. Comment: 8 pages, 4 figures. Presented at A Virtual Tribute to Quark Confinement and the Hadron Spectrum, August 2-6 2021, University of Stavanger, Stavanger, Norway |
| Databáze: | OpenAIRE |
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