A comparison of spectral reconstruction methods applied to non-zero temperature NRQCD meson correlation functions

Autor:	Spriggs, Thomas, Aarts, Gert, Allton, Chris, Burns, Timothy, D'Arcy, Rachel Horohan, Jäger, Benjamin, Kim, Seyong, Lombardo, Maria-Paola, Offler, Sam, Page, Ben, Ryan, Sinead M., Skullerud, Jon-Ivar
Rok vydání:	2021
Předmět:	High Energy Physics - Lattice
Druh dokumentu:	Working Paper
DOI:	10.1051/epjconf/202225805011
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:	arXiv
Externí odkaz:	http://arxiv.org/abs/2112.04201 Zobrazit plný text záznamu View this record from Arxiv