Type
Text
Type
Dissertation
Advisor
Tsybychev, Dmitri | Siegel, Warren | Herzog, Christopher | Khuri, Marcus.
Date
2016-12-01
Keywords
Physics | F-theory, String Theory, Superconformal, Superspace, Supersymmetry
Department
Department of Physics
Language
en_US
Source
This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.
Identifier
http://hdl.handle.net/11401/76645
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
Supersymmetry is a very popular topic in recent high energy physics theories. Especially, in order to make sense of string theory, we have to impose supersymmetry. Superspace method is proven to be a very useful approach to supersymmetric theories by treating supersymme- try as part of the geometry. In this dissertation, we use superspace method to investigate superconformal field theory and string/brane theory. The first part of the dissertation, we rewrite semi-shortening con- ditions using superspace approach. The rewritten expression is co- variant under superconformal transformation. We found that all the known semi-shortening condition are part of the covariantized ones and can be generalized to weaker shortening conditions. We also give an example how one can find other constraints from the known ones, particularly in N = 4 SYM in projective superspace. The second part is focused on “F-theory†, a theory that has man- ifestly U-duality. It can be reduced to M-theory, manifestly T-dual version string theory, and ordinary string theory. The theory is for- mulated on coset space G/H where G is the U-duality group and H is the unbroken symmetry group. We modified coset space formalism to find a general algebra for the symmetry currents. And we give an explicit example on 10 dimensional F-theory which can reduce to 3D string theory. | 99 pages
Recommended Citation
Ju, Chia-Yi, "Some Applications of Superspace" (2016). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 2532.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/2532