학술논문
A comparison of spectral reconstruction methods applied to non-zero temperature NRQCD meson correlation functions.
Document Type
Article
Author
Source
Subject
*MAXIMUM likelihood statistics
*REGRESSION analysis
*MACHINE learning
*QUANTUM chromodynamics
*LATTICE dynamics
*EQUATIONS
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Language
ISSN
2101-6275
Abstract
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. [ABSTRACT FROM AUTHOR]