title: Global Fits for New Physics at the LHC and Beyond
creator: Butter, Anja
subject: ddc-530
subject: 530 Physics
description: We study physics beyond the Standard Model with state–of–the–art global fits of both UV-complete  models like supersymmetry and the more general effective field theories (EFTs).  The gamma-ray excess from the galactic center measured by Fermi–LAT can be interpreted as a  dark matter signature in the minimal supersymmetric model. Using the SFitter framework we  identify different annihilation channels with a dark matter mass up to 300 GeV yielding the  measured spectrum. Strong constraints from direct detection experiments and relic density  rule out large regions of the parameter space, favoring a pseudoscalar mediator. In the next–  to–minimal supersymmetric model the additional singlet allows efficient annihilation of dark  matter particles below 60 GeV via a light pseudoscalar. We connect the resulting solutions to  the GC excess with a large invisible Higgs branching ratio in reach of the LHC.  Finally we use the EFT framework to constrain higher-dimensional operators from the Higgs  and the electroweak gauge sector. Our bounds on triple gauge–boson couplings from LHC di–  boson channels are several times stronger than those obtained from LEP data. The combination  of Higgs measurements and triple gauge vertices leads to a significant improvement in the  entire set of operators.
date: 2017
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/23710/1/phd_thesis_a_butter.pdf
identifier: DOI:10.11588/heidok.00023710
identifier: urn:nbn:de:bsz:16-heidok-237109
identifier:   Butter, Anja  (2017) Global Fits for New Physics at the LHC and Beyond.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/23710/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng