Aspects of beyond MSSM Higgs physics: implications for the Higgs spectrum and processes and a full set of BMSSM Feynmanrules

Boehner, Susanne (2014) Aspects of beyond MSSM Higgs physics: implications for the Higgs spectrum and processes and a full set of BMSSM Feynmanrules. Masters thesis (MPhil), University of Sussex.

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Abstract

Beyond MSSM (BMSSM) Models provide natural solutions to the little hierarchy problem in minimal SUSY theories. Well studied extensions of the MSSM can be organised in an effective operator approach utilising the merrits of an Effective Field Theory to study BMSSM effects. Lifting the lightest Higgs mass to the current LHC bound of 126 ± 0.4 ± 0.4 GeV [8] [9] through the stop loop contribution, BMSSM effects can make significant changes to the upper bounds of Higgs and top squark masses. BMSSM corrections to MSSM Feynman rules are leading to new processes but also significant contributions to in leading order 1 [over] tan β to the MSSM amplitudes. In this work we are exploring effects on the Higgs sector mass spectrum and also Higgs interactions in the setup of [1]. The theoretical foundation for Supersymmetry is presented and a motivation for Beyond minimal SUSY models is outlined. The MSSM Higgs sector is presented, followed by an elaborate demonstration how BMSSM contributions in the effective operator approach [1] affect the MSSM Higgs mass spectrum and processes. Finally as an original contribution a full list of Feynman rules for all cubic and quartic BMSSM tree level vertices is presented
and discussed.

Item Type: Thesis (Masters)
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics > QC0170 Atomic physics. Constitution and properties of matter Including molecular physics, relativity, quantum theory, and solid state physics
Depositing User: Library Cataloguing
Date Deposited: 18 Jun 2014 13:57
Last Modified: 21 Sep 2015 14:48
URI: http://sro.sussex.ac.uk/id/eprint/48924

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