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Related Experiment Videos

Baryogenesis at low reheating temperatures

Davidson1, Losada, Riotto

  • 1Theoretical Physics, Oxford University, 1 Keble Road, Oxford, OX1 3NP, United Kingdom.

Physical Review Letters
|September 16, 2000
PubMed
Summary
This summary is machine-generated.

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See all related articles

The early universe

Area of Science:

  • Cosmology
  • Particle Physics
  • Baryogenesis

Background:

  • The standard model of particle physics describes fundamental particles and forces.
  • Baryogenesis explains the asymmetry between matter and antimatter in the universe.
  • The reheating phase after inflation is crucial for particle physics processes.

Purpose of the Study:

  • To investigate the conditions for electroweak baryogenesis.
  • To explore the implications of a maximum reheating temperature exceeding the radiation-dominated era temperature.
  • To re-evaluate the upper bound on the Higgs mass related to baryon asymmetry preservation.

Main Methods:

  • Analyzing the thermal equilibrium of standard model anomalous (B+L)-violating processes.
  • Considering temperatures below the reheating temperature T(r) but above 1 GeV.

Related Experiment Videos

  • Examining alternative sources of baryon asymmetry, such as Affleck-Dine mechanism or chiral asymmetries.

    • Main Results:

    • Standard model anomalous (B+L)-violating processes can be in thermal equilibrium at temperatures below T(r).
    • Electroweak baryogenesis is viable under these conditions, potentially relaxing the Higgs mass upper bound.
    • The baryon asymmetry can be reprocessed by sphaleron transitions from other asymmetries.

    Conclusions:

    • The maximum temperature during reheating plays a critical role in baryogenesis models.
    • The Higgs mass constraint can be modified, opening new possibilities for electroweak baryogenesis.
    • Alternative mechanisms for generating and preserving baryon asymmetry are viable.