%0 Conference Paper
%A Zwicky, Roman
%T A brief Introduction to Dispersion Relations and Analyticity
%N DESY-PROC-2016-04
%C Hamburg
%I Verlag Deutsches Elektronen-Synchrotron
%M PUBDB-2017-06825
%M DESY-PROC-2016-04
%@ 978-3-945931-07-3
%B DESY-PROC
%P 93-120
%D 2017
%< Zwicky, Roman "A brief Introduction to Dispersion Relations and Analyticity" in Proceedings of the Helmholtz International Summer School 2016 (HQ 2016) : Quantum Field Theory at the Limits : from Strong Fields to Heavy Quarks / Ali, Ahmed, Blaschke, David, Issadykov, Aidos, Ivanov, Mikhail (eds.), Verlag Deutsches Elektronen-Synchrotron : 2017 ; HQ 2016 : Helmholtz International Summer School 2016, 2016-07-18 - 2016-07-30, Dubna
%X In these lectures we provide a basic introduction into the topic of dispersion relation and analyticity. The properties of 2-point functions are discussed in some detail from the viewpoint of the Källén-Lehmann and general dispersion relations. The Weinberg sum rules figure as an application. The analytic structure of higher point functions in perturbation theory are analysed through the Landau equations and the Cutkosky rules.
%B Quantum Field Theory at the Limits
%C 18 Jul 2016 - 30 Jul 2016, Dubna (Russia)
Y2 18 Jul 2016 - 30 Jul 2016
M2 Dubna, Russia
%F PUB:(DE-HGF)29 ; PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
%9 ReportContribution to a conference proceedingsContribution to a book
%R 10.3204/DESY-PROC-2016-04/Zwicky
%U https://bib-pubdb1.desy.de/record/330326