Speaker
Peter Lowdon
(Goethe University Frankfurt)
Description
Local quantum field theory (QFT) provides a framework for establishing the non-perturbative constraints imposed on finite-temperature correlation functions. In this talk I will discuss how the locality of fields has significant implications for the spectral properties of finite-temperature QFTs, in particular that the peak-broadening effects experienced by particle states can be directly extracted from imaginary-time correlation functions. As an application, I discuss the calculation of the pion spectral function from Euclidean data.
Primary author
Peter Lowdon
(Goethe University Frankfurt)
Co-authors
Owe Philipsen
(Goethe University Frankfurt)
Ralf-Arno Tripolt
(University of Giessen)
