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@PHDTHESIS{Rathmann:1013584,
author = {Rathmann, Lena Maria},
othercontributors = {Krämer, Michael and Kahlhöfer, Felix Karl David},
title = {{D}ark matter indirect detection and phenomenology of
flavored dark matter models},
school = {RWTH Aachen University},
type = {Dissertation},
address = {Aachen},
publisher = {RWTH Aachen University},
reportid = {RWTH-2025-05621},
pages = {1 Online-Ressource : Illustrationen},
year = {2025},
note = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
University; Dissertation, RWTH Aachen University, 2025},
abstract = {Dark matter remains one of the most fascinating puzzles in
modern physics, with its existence being well established
through a variety of astrophysical observations. However,
despite extensive experimental and theoretical efforts, the
properties of dark matter remain largely unknown. In this
thesis, we contribute to the search for dark matter by
studying two different strategies: First, we study indirect
detection with cosmic ray antideuterons which can provide
insights into the interactions of dark matter with Standard
Model particles. Second, we develop dark matter models to
help explain the observational evidence and study
specifically the phenomenology of flavored dark matter
models. In the first part, we investigate the indirect
detection of dark matter with cosmic ray antideuterons which
are expected to have a much lower background compared to
other antiparticles, making them a promising target for dark
matter searches. We compute their injection spectrum using
Monte Carlo simulations, taking into account the
uncertainties that arise from the modeling of the production
of antideuterons. We simulate the propagation of
antideuterons through the Galaxy using two different
propagation models and include the uncertainties of the
propagation parameters. The computed antideuteron fluxes are
used to develop and train a neural network emulator to
predict the antideuteron flux with a significant speed-up
compared to simulations. Using the emulator, we investigate
the sensitivity of current and future experiments to
antideuterons produced in dark matter annihilations. We find
that our tool is accurate and efficient and can be used for
the interpretation of future antideuteron data in the
context of dark matter. In the second part of the thesis we
focus on the phenomenology of flavored dark matter models.
These models offer a rich phenomenology that can evade
current constraints and allow for a more dynamic freeze-out
phenomenology. First, we study a flavored Majorana dark
matter model with couplings to up-type quarks and focus on
more general freeze-out scenarios. We perform detailed scans
over the parameter space to obtain viable points that are
not excluded by current constraints and find that including
coannihilation and conversion processes significantly
increases the viable parameter space of the model. The
parameter space is then confronted with constraints from a
variety of LHC searches, and we discuss possible signatures
to distinguish the Majorana dark matter model from the Dirac
case. We find that the charge asymmetry in the production of
a top quark and a jet is a promising signature. Lastly, we
expand the study to include a variety of flavored dark
matter models and develop a framework to perform an
automated study of the phenomenology of these models. This
framework includes all relevant constraints from the relic
abundance, direct and indirect detection experiments as well
as flavor and collider constraints and allows for a
systematic study of the viable parameter space of flavored
dark matter models. To demonstrate the capabilities of the
framework, we perform a study of a model with couplings to
right-handed leptons. We conclude that the phenomenology of
the model can be studied very efficiently with this
framework and find that it is mostly constrained by the
relic abundance and flavor observables.},
cin = {136110 / 130000},
ddc = {530},
cid = {$I:(DE-82)136110_20140620$ / $I:(DE-82)130000_20140620$},
pnm = {DFG project G:(GEPRIS)418642100 - Neue flavour-verletzende
Wechselwirkungen bei hohen Transversalimpulsen (C3a)
(418642100) / TRR 257: Phänomenologische
Elementarteilchenphysik nach der Higgs-Entdeckung},
pid = {G:(GEPRIS)418642100 / G:(GEPRIS)396021762},
typ = {PUB:(DE-HGF)11},
doi = {10.18154/RWTH-2025-05621},
url = {https://publications.rwth-aachen.de/record/1013584},
}
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