TY  - JOUR
AU  - Anisha
AU  - Arco, Francisco
AU  - Di Noi, Stefano
AU  - Englert, Christoph
AU  - Mühlleitner, Margarete
TI  - Z and Higgs factory implications of two Higgs doublets with first-order phase transitions
JO  - Journal of high energy physics
VL  - 10
IS  - 10
SN  - 1126-6708
CY  - Heidelberg
PB  - Springer
M1  - PUBDB-2025-05538
M1  - arXiv:2506.18555
M1  - KA-TP-17-2025
M1  - DESY-25-085
SP  - 179
PY  - 2025
N1  - J. High Energ. Phys. 2025, 179 (2025)
AB  - We investigate the potential of future electron-positron colliders, such as FCC-ee and CEPC, to probe 2-Higgs-doublet models (2HDMs) that facilitate a strong first-order electroweak phase transition (SFOEWPT), a necessary condition for electroweak baryogenesis. Focusing on a 2HDM in the CP-conserving limit, we identify parameter regions consistent with an SFOEWPT and evaluate their compatibility with projected precision electroweak and Higgs measurements, as well as searches for exotic Higgs bosons. We show that radiative corrections to e<sup>+</sup>e<sup>−</sup> → hZ production introduce deviations in the cross section that are resolvable with the anticipated sub-percent precision at lepton colliders even when experimental outcomes of the LHC and Z pole measurements are in agreement with the SM. This underscores the opportunities of a precision lepton collider to explore BSM quantum corrections to the Higgs sector more broadly.
KW  - Electroweak Precision Physics (autogen)
KW  - Multi-Higgs Models (autogen)
KW  - Phase Transitions in the Early Universe (autogen)
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1007/JHEP10(2025)179
UR  - https://bib-pubdb1.desy.de/record/642385
ER  -