Quasipotential approach to the Bethe-Salpeter equation for positronium

dc.rights.license	CC-BY-NC-ND
dc.contributor.advisor	Laenen, Eric
dc.contributor.advisor	Gursoy, Umut
dc.contributor.author	Rajamov, M.
dc.date.accessioned	2019-08-20T17:00:45Z
dc.date.available	2019-08-20T17:00:45Z
dc.date.issued	2019
dc.identifier.uri	https://studenttheses.uu.nl/handle/20.500.12932/33486
dc.description.abstract	We discuss why the usual perturbation theory in unsuited for the study of bound states in quantum field theory. The Dyson equation for the 4-point Green's function is then presented and the Bethe-Salpeter equation derived from it, by using Green's function factorization around bound state poles. Some historical facts are given for context, after which we discuss a particular approach for solving the Bethe-Salpeter equation known as the quasipotential approach. We discuss several possible choices of gauge and two-body propagator that can be used within this scheme and use one to calculate the leading order hyperfine splitting in positronium.
dc.description.sponsorship	Utrecht University
dc.format.extent	535068
dc.format.mimetype	application/pdf
dc.language.iso	en
dc.title	Quasipotential approach to the Bethe-Salpeter equation for positronium
dc.type.content	Master Thesis
dc.rights.accessrights	Open Access
dc.subject.keywords	Green's function, two-body propagator, positronium, hydrogen, bound state, perturbation theory, quasipotential
dc.subject.courseuu	Theoretical Physics