PHENOMENOLOGICAL STUDY OF THE 3-HIGGS DOUBLET MODEL UNDER THE S3 SYMMETRY AT FUTURE e^+ e ^− COLLIDERS
TURKISH PHYSICAL SOCIETY 42 INTERNATIONAL PHYSICS CONGRESS, Muğla, Türkiye, 31 Ağustos - 04 Eylül 2026, ss.184, (Özet Bildiri)
- Yayın Türü: Bildiri / Özet Bildiri
- Basıldığı Şehir: Muğla
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.184
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
This talk will present the single and double Standard Model (SM)-like Higgs boson
production at future e+e− colliders in the S3 model with three Higgs doublets (S3-3H). As
a first step, we introduce the scalar and gauge sector of the S3-3H model. Next, we
investigate the parameter space of the model. The parameter space of the model is narrowed
down by theoretical arguments such as perturbative unitarity and vacuum stability and
experimental data from the Large Hadron Collider (LHC) and the Tevatron. In our
phenomenological analysis, we compute single Higgs production cross sections via
Higgsstrahlung (HS) and Vector Boson Fusion (VBF) processes. We find that for the
selected benchmark point, the predicted cross sections for the HS and VBF processes are
approximately 70% smaller than those predicted by the SM. We investigate the dependence
of the cross sections on the Higgs-gauge boson coupling modifier Κ_hVV. Hence, a precise
measurement of Κ_hVV can be considered a signature of the S3-3H model. Finally, we evaluate
double Higgs production via VBF and HS processes in the S3-3H model. As the double
Higgs boson production process offers a direct probe of the Higgs boson self-coupling, it is
an important tool for exploring the scalar sector. The production rates depart from the SM
expectations up to a few orders of magnitude due to additional scalars in our model. We
also find that the VBF mode is more sensitive to Higgs self-coupling than the HS mode.
Hence, the deviations in the Higgs couplings from the SM expectations can be crucial to
disentangle the S3-3H model from other beyond-the SM scenarios. Higgs production at
future e+e- colliders offers an excellent opportunity to test physics beyond the SM.