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@INPROCEEDINGS{Braathen:630138,
author = {Braathen, Johannes and Heinemeyer, Sven and Verduras
Schaeidt, Alain},
title = {{L}ooking for {SFOEWPT} in the {R}x{SM} at the {HL}-{LHC}
and {LISA}},
reportid = {PUBDB-2025-01843},
year = {2025},
abstract = {We explore the real-singlet extension of the Standard Model
without a Z2 symmetry (RxSM) as a framework to address the
baryon asymmetry of the Universe and investigate
modifications to the Higgs potential. First, we identify
regions of parameter space that allow a Strong First-Order
Electroweak Phase Transition (SFOEWPT) using the public
tools BSMPT, CosmoTransitions, and TransitionListener, while
incorporating relevant theoretical constraints as well as
experimental bounds through HiggsTools. Additionally, we
calculate the stochastic gravitational wave background and
assess its potential observability at LISA. Next, we
determine the one-loop corrections to the trilinear Higgs
couplings involved in di-Higgs production (hhh) and (hhH)
using the public code anyH3. Finally, we evaluate the
di-Higgs production cross section at the (HL-)LHC within the
regions of the RxSM parameter space that permit an SFOEWPT,
taking into account the one-loop corrections to the
trilinear Higgs couplings. This result is compared with
those obtained in the SM and in the RxSM at tree level,
highlighting the significant impact of loop corrections on
the trilinear couplings.},
month = {Jun},
date = {2025-06-09},
organization = {HPNP25, Osaka (Japan), 9 Jun 2025 - 13
Jun 2025},
cin = {T},
cid = {I:(DE-H253)T-20120731},
pnm = {611 - Fundamental Particles and Forces (POF4-611) / DFG
project G:(GEPRIS)520070247 - Untersuchungen von Neue Physik
mit generischen Präzisionsberechnungen (520070247)},
pid = {G:(DE-HGF)POF4-611 / G:(GEPRIS)520070247},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)24},
url = {https://bib-pubdb1.desy.de/record/630138},
}