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

Autor:	Offler, Sam, Aarts, Gert, Allton, Chris, Jäger, Benjamin, Kim, Seyong, Lombardo, Maria-Paola, Page, Benjamin, Ryan, Sinead M., Skullerud, Jon-Ivar, Spriggs, Thomas
Rok vydání:	2021
Předmět:	High Energy Physics - Lattice Nuclear Theory
Druh dokumentu:	Working Paper
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. Comment: 9 pages, 10 figures, contribution to the 38th International Symposium on Lattice Field Theory, 26th-30th July 2021, Massachusetts Institute of Technology, USA
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2112.02116 Zobrazit plný text záznamu View this record from Arxiv