The work is centered on the study of dimensionally reduced vector effective field theories from the point of view of soft scalar limits using the spinor-helicity formalism. The Dirac-Born-Infeld model is singled out by its enhanced soft limit at the level of four and six-point amplitudes. In the process, the spinor-helicity formalism is outlined and its use illustrated on explicit examples. The remainder of the work is focused on the corresponding questions in six dimensions. The rel- evant version of spinor-helicity formalism is presented, followed by a discussion of little group invariants and of the (im)possibility of their use on characteriza- tion of theories. Lastly, attempts at formalizing the process of taking the soft limit are made, with inspiration from the four-dimensional case. 1
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:396871 |
| Date | January 2019 |
| Creators | Skácel, Ondřej |
| Contributors | Novotný, Jiří, Kampf, Karol |
| Source Sets | Czech ETDs |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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