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Browsing the Web of Amplitudes
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

We begin by studying field-theory amplitude relations such as the Kleiss-Kuijf, Bern-Carrasco-Johansson, Kawai-Lewellen-Tye and the double copy construction, which are important ingredients in this thesis. Going beyond the field-theory limit we study how the gauge-sector of the heterotic string relates to type I amplitudes through the single valued projection of multiple zeta values. At low energy and for a U(1) gauge group (a single brane) the type I amplitudes are generated by the Born-Infeld action, whereas the corresponding heterotic amplitudes vanish in this limit. As a simple exercise we study Yang-Mills theory deformed by a $F^4$ operator, which is the first correction induced by the Born-Infeld action. This exercise is then generalized by considering the four- and six-point amplitudes in Tseytlin's proposal for a non-Abelian Born-Infeld action. Comparing these amplitudes with those found in type I and heterotic string theory we attempt to gain more insight about the non-Abelian Born-Infeld action.

Place, publisher, year, edition, pages
2016. , p. 56
Series
FYSAST ; FYSMAS1051
Keywords [en]
amplitude, amplitudes, relation, relations, browsing, web, bcj, kk, double, copy, zeroth, klt, single, valued, projection, quantum, field, theory, qft, string, type, I, II, heterotic
National Category
Other Physics Topics
Identifiers
URN: urn:nbn:se:uu:diva-309989OAI: oai:DiVA.org:uu-309989DiVA, id: diva2:1054678
Educational program
Master Programme in Physics
Presentation
2016-11-28, Oseenska Rummet, Ångström, Uppsala, 14:15 (English)
Supervisors
Examiners
Available from: 2017-01-19 Created: 2016-12-08 Last updated: 2017-01-19Bibliographically approved

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