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High Energy Physics Seminar

Thursday, May 6, 2021
12:00pm to 1:00pm
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Online Event
Nonstandard thermal histories and the small-scale matter power spectrum
Jessie Shelton, UIUC,

Decoupled hidden sectors in the early universe can easily and generically result in departures from radiation domination prior to BBN, leaving a potentially observable footprint in the distribution of dark matter on very small scales.   I'll talk about the gravitational consequences of an era of modified cosmic expansion, maps to the particle physics of decoupled hidden sectors that can realize such eras, and the resulting features in the (linear) matter power spectrum, with an eye toward potential future observability.

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