What question did this study set out to answer?

To determine whether gravitational particle production during the transition and oscillation epochs of cosmic inflation can generate the observed relic abundance of dark matter lacking non-gravitational interactions.

September 1, 2018Journal of High Energy PhysicsOpen Access

Production of purely gravitational dark matter

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To determine whether gravitational particle production during the transition and oscillation epochs of cosmic inflation can generate the observed relic abundance of dark matter lacking non-gravitational interactions.
Calculated gravitational particle production rates transitioning from the end of inflation into the inflaton oscillation epoch within realistic inflation models.
Evaluated viable parameter space by comparing dark matter mass against the inflationary Hubble parameter and inflaton mass scales.
Viable relic abundances of dark matter can be generated purely through gravitational dynamics depending on the chosen inflation model and particle mass.
Gravitational particle production remains efficient even when dark matter particle mass substantially exceeds the Hubble scale during inflation, provided it remains lighter than the inflaton mass.

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Implication

Theoretical analysis reveals viable production of purely gravitational dark matter during post-inflation transitions, indicating non-gravitational interactions are unnecessary to explain relic...

Cite This Study

A 2018 study studied this question.

synapsesocial.com/papers/6a83074a67735c513e7d5a48 https://doi.org/10.1007/jhep09(2018)135

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Implication

Theoretical analysis reveals viable production of purely gravitational dark matter during post-inflation transitions, indicating non-gravitational interactions are unnecessary to explain relic...

Production of purely gravitational dark matter

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Discussion

Implication

Cite This Study

Production of purely gravitational dark matter

Key Points

Discussion

Implication

Cite This Study

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