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Area of Science:

  • Cosmology
  • Particle Physics
  • Quantum Field Theory

Background:

  • The Standard Model requires nonminimal gravitational coupling for renormalization in curved spacetime.
  • Vacuum stability during high-scale inflation necessitates this coupling for the Higgs field.
  • Investigating the Higgs field dynamics at the end of cosmic inflation is crucial.

Purpose of the Study:

  • To examine the Higgs field dynamics in a minimal inflationary scenario.
  • To understand the role of nonminimal gravitational coupling (ξ) of the Higgs field.
  • To determine the consequences of spacetime curvature at the end of inflation.

Main Methods:

  • Simulating the minimal inflationary scenario with an inflaton field coupled to the Standard Model Higgs field.
  • Analyzing the effects of nonminimal gravitational coupling (ξ) on Higgs particle production.
  • Investigating the impact of rapidly changing spacetime curvature on vacuum stability.

Main Results:

  • For nonminimal coupling ξ≳1, significant Higgs particle production occurs.
  • Rapidly changing spacetime curvature can trigger a transition to a negative-energy vacuum state.
  • This transition can lead to an immediate collapse of the Universe.

Conclusions:

  • The nonminimal gravitational coupling of the Higgs field has profound implications for cosmic evolution.
  • High-energy physics and cosmology are intricately linked through phenomena like Higgs field dynamics.
  • The stability of the Universe's vacuum state is sensitive to inflationary end-stage dynamics.