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Aspman, J. (2018) *On the predictability of string theory*. Göteborg : Chalmers University of Technology

** BibTeX **

@mastersthesis{

Aspman2018,

author={Aspman, Johannes},

title={On the predictability of string theory},

abstract={Eleven-dimensional supergravity can be compactied on AdS4M7 where M7 can be chosen
as the so called squashed seven-sphere. This allows two solutions, depending on the
orientation of the sphere, one with N = 1 supersymmetry and one non-supersymmetric.
Both solutions correspond to spontaneous symmetry breakings of the round sphere. However,
recent conjectures concerning the string landscape have led to the statement that
non-supersymmetric AdS vacua should be unstable. By studying the standard model of
particle physics one can make certain predictions about the masses of neutrinos from this
conjecture, leading to measureable predictions from string theory.
This thesis aims to study the mass spectra of the squashed sphere in order to gain
some insight into whether or not any instabilities occur. This could then either disprove
or strengthen the proposed conjectures. The full spectrum is not found but some helpful
steps along the way have been provided. In particular, only the scalar, vector and spinor
spectra are studied.
The thesis also discusses some of the conjectures regarding the string landscape in
more detail and shows how these can be used to make predictions in particle physics. The
concepts of Kaluza-Klein compactication and supersymmetry are also introduced, as well
as some group theoretical methods for studying dierential operators on manifolds. The
full mass spectra of the round seven-sphere are derived using two dierent methods.},

publisher={Institutionen för fysik (Chalmers), Chalmers tekniska högskola},

place={Göteborg},

year={2018},

note={139},

}

** RefWorks **

RT Generic

SR Electronic

ID 255601

A1 Aspman, Johannes

T1 On the predictability of string theory

YR 2018

AB Eleven-dimensional supergravity can be compactied on AdS4M7 where M7 can be chosen
as the so called squashed seven-sphere. This allows two solutions, depending on the
orientation of the sphere, one with N = 1 supersymmetry and one non-supersymmetric.
Both solutions correspond to spontaneous symmetry breakings of the round sphere. However,
recent conjectures concerning the string landscape have led to the statement that
non-supersymmetric AdS vacua should be unstable. By studying the standard model of
particle physics one can make certain predictions about the masses of neutrinos from this
conjecture, leading to measureable predictions from string theory.
This thesis aims to study the mass spectra of the squashed sphere in order to gain
some insight into whether or not any instabilities occur. This could then either disprove
or strengthen the proposed conjectures. The full spectrum is not found but some helpful
steps along the way have been provided. In particular, only the scalar, vector and spinor
spectra are studied.
The thesis also discusses some of the conjectures regarding the string landscape in
more detail and shows how these can be used to make predictions in particle physics. The
concepts of Kaluza-Klein compactication and supersymmetry are also introduced, as well
as some group theoretical methods for studying dierential operators on manifolds. The
full mass spectra of the round seven-sphere are derived using two dierent methods.

PB Institutionen för fysik (Chalmers), Chalmers tekniska högskola,

LA eng

LK http://publications.lib.chalmers.se/records/fulltext/255601/255601.pdf

OL 30