Standard Model Background of the Cosmological Collider

Area of Science:

• Cosmology
• Particle Physics
• High-Energy Physics

Background:

• The inflationary universe offers a unique
• cosmological collider
• environment.
• This environment operates at the Hubble scale energy, capable of producing extremely massive particles.

Purpose of the Study:

• To establish the standard model background signals for the cosmological collider.
• To enable the exploration of new physics at very high energy scales.

Main Methods:

• Analyzing the theoretical framework of the inflationary universe as a particle collider.
• Identifying and characterizing the expected signals from standard model particle production.

Main Results:

• The study details the standard model particle physics background within the cosmological collider context.
• This provides a baseline for identifying potential deviations indicative of new physics.

Conclusions:

• Understanding the standard model background is a prerequisite for using the cosmological collider to probe new physics.
• The findings pave the way for future searches for physics beyond the standard model using cosmological data.