Is electroweak baryogenesis dead?

Area of Science:

• Particle Physics
• Cosmology
• High-Energy Physics

Background:

• Traditional electroweak baryogenesis models face challenges like fine-tuning and Landau poles.
• Existing models with singlet scalars improve phase transitions but lack UV completeness for baryogenesis.
• No UV complete models have successfully demonstrated baryogenesis in these settings.

Purpose of the Study:

• To propose a new model for electroweak baryogenesis that avoids fine-tuning.
• To demonstrate a UV complete model consistent to scales above 1 TeV.
• To introduce a novel source of CP violation within a singlet scalar coupling to the Higgs.

Main Methods:

• Introducing a new source of particle-antiparticle (CP) violation in singlet field couplings.
• Developing a model where dark matter is central to generating CP asymmetry.
• Ensuring the model's consistency to scales significantly above 1 TeV.

Main Results:

• A new model of electroweak baryogenesis is demonstrated.
• The model requires no fine-tuning of parameters.
• It is consistent with physics up to scales well above 1 TeV.
• Dark matter is shown to be the primary driver of CP asymmetry, leading to baryon asymmetry.

Conclusions:

• The proposed model offers a viable solution to challenges in electroweak baryogenesis.
• It provides a UV complete framework for generating the baryon asymmetry.
• Dark matter's role in CP violation offers new avenues for theoretical exploration.