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This research investigates the effects of cosmological gravitational particle production in Higgs inflation.

Higgs inflation: particle factory

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Randomized trial examines particle production in Higgs inflation, suggesting implications for dark matter.

This research investigates the effects of cosmological gravitational particle production in Higgs inflation.
Analyzed the characteristics of particle production using a scalar field with quartic self-coupling and nonminimal coupling to gravity.
Calculated the peak occupation number and its scaling with the nonminimal coupling parameter ξ.
Discussed implications for late-time relics, such as dark matter.
Identified explosive particle production that peaks at a comoving wavenumber k ~ ξ 2 / 3 aH.
Demonstrated that the new peak in production can dominate over conventional CGPP for modest values of ξ.
Highlighted the implications for dark matter and relic particle distribution as ξ varies.

Chowdhury et al. (2026) studied this question.

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