Reconstruction of bottomonium spectral functions in thermal QCD using Kernel Ridge Regression

Autor:	Samuel Offler, Gert Aarts, Chris Allton, Benjamin Jaeger, Seyong Kim, Maria Paola Lombardo, Ben Page, Sinead Ryan, Jon-Ivar Skullerud, Thomas Spriggs
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	Nuclear Theory (nucl-th) High Energy Physics - Lattice Nuclear Theory High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) FOS: Physical sciences
Popis:	We discuss results for bottomonium at nonzero temperature obtained using NRQCD on Fastsum Generation 2L ensembles, as part of the Fastsum collaboration's programme to determine the spectrum of the bottomonium system as a function of temperature using a variety of approaches. Here we give an update on results for spectral functions obtained using Kernel Ridge Regression. We pay in particular attention to the generation of training data and introduce the notion of using lattice QCD ensembles to learn how to improve the generation of training data. A practical implementation is given. 9 pages, 10 figures, contribution to the 38th International Symposium on Lattice Field Theory, 26th-30th July 2021, Massachusetts Institute of Technology, USA
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ad7e20af0891a2ad24017a0513e577b http://arxiv.org/abs/2112.02116 Zobrazit plný text záznamu