Chasing the Two-Higgs-Doublet Model via Electroweak Corrections at e^{+}e^{-} Colliders.

Area of Science:

• Particle Physics
• High-Energy Physics
• Collider Physics

Background:

• The Standard Model (SM) describes fundamental particles and forces.
• The Two-Higgs-Doublet Model (2HDM) is an extension of the SM.
• Electron-positron colliders offer precise environments for particle physics studies.

Purpose of the Study:

• To investigate Higgs boson production associated with neutrino pairs (e^{+}e^{-}→hνν[over ¯]).
• To analyze these processes at next-to-leading-order (NLO) accuracy.
• To explore the potential for discovering new physics beyond the Standard Model.

Main Methods:

• Calculations performed at next-to-leading-order (NLO) accuracy.
• Analysis within both the Standard Model (SM) and the Two-Higgs-Doublet Model (2HDM).
• Comparison of theoretical predictions including electroweak corrections with experimental observables.

Main Results:

• New physics effects in e^{+}e^{-}→hνν[over ¯] are observable in total and differential cross sections.
• These effects are detectable even in the Higgs alignment limit.
• Electroweak corrections play a crucial role in distinguishing new physics signals.

Conclusions:

• Precision studies at future e^{+}e^{-} colliders are vital for new physics searches.
• The process e^{+}e^{-}→hνν[over ¯] provides a sensitive probe for physics beyond the Standard Model.
• The Higgs alignment limit does not obscure the observability of new physics effects.