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Durham e-Theses
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Contact interactions for point particles and strings

EDWARDS, JAMES,PAUL (2015) Contact interactions for point particles and strings. Doctoral thesis, Durham University.

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We investigate delta-function contact interactions for theories of point particles and of strings. These interactions are introduced to reformulate the conventional theory of classical electrodynamics in terms of particles and strings which interact when they intersect. Upon quantisation we find that the tensionless limit of the spinning string theory generates well-known gauge invariant quantities in the worldline formulation of quantum field theory. Despite the off-shell nature of the interaction we find that the string theory does not encounter the expected break-down of conformal invariance. We further develop worldline techniques for non-Abelian theories and consider first quantised versions of some grand unified theories. This work can be seen as initiating the construction of a first-quantised version of the quantum field theory describing the standard model.

Item Type:Thesis (Doctoral)
Award:Doctor of Philosophy
Keywords:String theory; Quantum field theory; Contact interactions; Standard model
Faculty and Department:Faculty of Science > Mathematical Sciences, Department of
Thesis Date:2015
Copyright:Copyright of this thesis is held by the author
Deposited On:02 Jun 2015 15:21

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