Effective fine structure constant

Reefat (2019) Effective fine structure constant. Masters thesis, Memorial University of Newfoundland.

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Abstract

In this thesis, we use the dispersive approach to calculate the effective fine structure constant. In this calculation, a truncated self-energy and triangle topology is considered up to Next-to-Next to Leading Order (NNLO). We have used the dispersive approach for two-loop self energy to evaluate a NNLO (two loop) contributions and a result obtained is rather compact expressions using only two loop Passarino-Veltman function basis. For the triangle topology, we have used a bulk approximation technique. The numerical result was obtained using the LoopTools and ColliersLink packages in Mathematica.

Item Type: Thesis (Masters)
URI: http://research.library.mun.ca/id/eprint/13965
Item ID: 13965
Additional Information: Includes bibliographical references (pages 107-108).
Keywords: NNLO, Mathematical modelling, Dispersion Approach, Fine Structure Constant, NLO, Fine Structure Constant
Department(s): Science, Faculty of > Physics and Physical Oceanography
Date: September 2019
Date Type: Submission
Library of Congress Subject Heading: Fine-structure constant--Mathematical models.

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