eprintid: 23710
rev_number: 14
eprint_status: archive
userid: 3416
dir: disk0/00/02/37/10
datestamp: 2017-11-17 07:55:26
lastmod: 2018-01-12 11:28:49
status_changed: 2017-11-17 07:55:26
type: doctoralThesis
metadata_visibility: show
creators_name: Butter, Anja
title: Global Fits for New Physics at the LHC and Beyond
subjects: 530
divisions: 130300
adv_faculty: af-13
cterms_swd: LHC
cterms_swd: Dark Matter
cterms_swd: Effective Field Theory
abstract: 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
id_scheme: DOI
id_number: 10.11588/heidok.00023710
ppn_swb: 1658658043
own_urn: urn:nbn:de:bsz:16-heidok-237109
date_accepted: 2017-11-02
advisor: HASH(0x564e1c3c97c0)
language: eng
bibsort: BUTTERANJAGLOBALFITS2017
full_text_status: public
citation:   Butter, Anja  (2017) Global Fits for New Physics at the LHC and Beyond.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/23710/1/phd_thesis_a_butter.pdf