Constraints on new physics from baryogenesis and Large Hadron Collider data.

Area of Science:

• Particle Physics
• Cosmology
• High-Energy Physics

Background:

• The Standard Model of particle physics has limitations in explaining cosmological observations.
• Electroweak baryogenesis is a key mechanism for generating the observed matter-antimatter asymmetry in the universe.
• New physics theories are needed to address these open questions.

Purpose of the Study:

• To demonstrate how electroweak baryogenesis can constrain theories of new physics.
• To apply these constraints to a specific model, a singlet scalar extension of the Standard Model.
• To investigate the impact of Large Hadron Collider (LHC) data on viable parameter space.

Main Methods:

• Developing a theoretical framework that requires consistency with electroweak baryogenesis.
• Utilizing current experimental data from the Large Hadron Collider (LHC) for validation.
• Analyzing a singlet scalar extension of the Standard Model as a case study.

Main Results:

• Stringent bounds are derived for new physics theories by imposing electroweak baryogenesis conditions.
• The viable parameter space for the singlet scalar extension is significantly reduced.
• The study highlights the power of combining cosmological requirements with collider data.

Conclusions:

• Electroweak baryogenesis serves as a powerful theoretical constraint for new physics.
• The singlet scalar extension of the Standard Model is significantly constrained by current data and baryogenesis requirements.
• Future research can explore other new physics models using this combined approach.